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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Korean Journal of Agricultural Science
Journal Basic Information
Journal DOI :
CNU Journal of Agricultural Science
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Volume & Issues
Volume 40, Issue 4 - Dec 2013
Volume 40, Issue 3 - Sep 2013
Volume 40, Issue 2 - Jun 2013
Volume 40, Issue 1 - Mar 2013
Selecting the target year
Effect of harvesting time and night temperature on tuber production of calla (Zantedeschia)
Nam, Chun-Woo ; Yoo, Dong-Lim ; Kim, Su-Jeong ; Suh, Jong-Teak ; Paek, Kee-Yoeup ; Lee, Sang Gyu ; Yoon, Moo Kyung ;
Korean Journal of Agricultural Science, volume 40, issue 4, 2013, Pages 271~276
DOI : 10.7744/cnujas.2013.40.4.271
This experiment was carried out to determine optimal culture conditions for the production of tubers of Calla (Zantedeschia elliottiana 'Golden Affair' and 'Black Magic') in Korea highland. In vitro produced plantlets and tuberlets of Calla 'Golden Affair' and 'Black Magic' were planted plastic film greenhouse and grown for 100, 120, 140 days, with different night temperature treatments (
: no heating, 10,
). In both cultivars, tuber size(tuber diameter, tuber height) and tuber weight increased with increasing cultivation period when the night temperature was maintained at
. The largest tuber diameter in vitro produced plantlets was 5.8cm in 'Black Magic' and 3.2cm in 'Golden Affair', and daily tuber growth rate was 1.110g in 'Black Magic' and 0.092g in 'Golden Affair' under the culture conditions. Consequently we think that tuber harvest date was Oct. 30 and night temperature was
and no heating that was proper method of tuber production. However we had selection of
treatment for tuber production because it appeared freezing damage occasionally in highland late in October.
Analysis on productivity and stability of introduced sweet corn hybrids
Na, Woong-Hyun ; Ha, Ji-Hyoung ; Lee, Jae-Heung ; Lee, Hee-Bong ;
Korean Journal of Agricultural Science, volume 40, issue 4, 2013, Pages 277~280
DOI : 10.7744/cnujas.2013.40.4.277
This study was carried out to compare the productivity and to evaluate the stability for the introduced sweet corn hybrids; Sunnychocolat, 7168Y and Gammiok as a check hybrids. The used materials were planted at Anseong and Daejeon by randomized block design with 3 replications on 21 April, 2013. In productivity of the used hybrid corns, plant and ear height showed comparatively stable as a 183.5 cm to 226.5 cm and 45.8 cm to 80.9 cm, respectively. In yield per 10a, number of ears was higher in Sunnychocolat than check, while Gammiok was very poor in kernel setting length and marketability. Beside, stability of the used hybrids also showed highly in the introduced hybrids than check in the ratio of ear to plant height, tolerance to environmental stress and low lodging. As results above, we thought that these introduced hybrids will be well adapted in domestic cultivation and growth habit as like other hybrid corns.
Plant quarantine isolated cultivation system in Korea and results of recorded in 2005-2012
Lee, Siwon ; Park, Jungan ; Lee, O-Mi ; Shin, Yong-Gil ;
Korean Journal of Agricultural Science, volume 40, issue 4, 2013, Pages 281~287
DOI : 10.7744/cnujas.2013.40.4.281
In Korea, isolated cultivation has been implemented for 102 genera, including about 250 species, each of which has underwent microscopic inspection, cultivation of bacteria in selective medium, analysis of physiology and biochemistry, enzyme-linked immunosorbent assay (ELISA) and polymerase chain reaction (PCR). The number of isolated microorganisms was 8,307 in the period of 2005-2012, and bulbs and tubers had the greatest diversity of microorganisms, of 5,165 (62.2%), followed by 2,119 (25.0%) sapling, 796 (9.6%) seed, 150 (1.8%) cutting slip, 70 (0.8%) branch graft and 7 (0.1%). The number of cases which were disqualified were 413 (4.97%), after the detection of 47 disease causing species of microorganism. Viruses predominated, with 27 species, followed by 16 fungi, a viroid, a Chromalveolata and 2 further species. Top on the list of detection was Arabis mosaic virus (77 cases), followed by Tobacco rattle virus (70 cases), Lily symptomless virus (46 cases) and Penicillium expansum (46 cases).
Seasonal variation in fatty acid composition in various parts of broccoli cultivars
Bhandari, Shiva Ram ; Park, Mi Young ; Chae, Won Byoung ; Kim, Dae-Young ; Kwak, Jung-Ho ;
Korean Journal of Agricultural Science, volume 40, issue 4, 2013, Pages 289~296
DOI : 10.7744/cnujas.2013.40.4.289
To evaluate seasonal variation in fatty acid composition in broccoli, 12 commercial cultivars of broccoli were grown in spring and fall season at the field of NIHHS, and their floret, leaf and stem parts were used for the fatty acid composition analyses. Among 14 fatty acids detected in broccoli, linolenic, palmitic and linoleic acids were major fatty acids comprising more than 80% of total fatty acids in both the seasons and all the parts. Likewise, stearic and oleic acids were also present in considerable amount while remaining fatty acids; caproic, lauric, myristic, pentadecanoic, palmitoleic, heptadecanoic, arachidic, behenic and lignoceric acids showed their minor compositional ratio. Among the three parts, stem exhibited highest SFAs (49.681% in spring and 50.717% in fall season) compared to MUFA and PUFA, while highest compositional ratio of PUFAs were observed in leaves (62.588% in spring and 68.931% in fall season), which indicates leaves as a good source of health beneficial fatty acids. In contrast, floret part exhibited highest SFA (48.786%) and PUFA (57.518%) in spring and fall seasons, respectively. Major fatty acids; palmitic, linoleic and linolenic acid showed lowest cultivar dependent variation (below 10%) and leaf showed least variation in both the seasons compared to floret and stem. Our results suggest that all the fatty acids are significantly influenced by genotype of cultivars (C), plant parts (P) and growing seasons (S). Among the 14 fatty acids, myristic and palmitic acid showed highest positive or negative correlationship with oleic (r=
) and linolenic acid (r=-
), respectively. The most abundant fatty acid, linolenic acid, showed either negative or no correlation ship with other fatty acids while palmitic acid, a second major fatty acid, exhibited either positive or negative correlation ship.
Effect of night break treatment using Red LED (660 nm) on flower bud initiation and growth characteristics of chrysanthemum cv. 'Baekma', and cv. 'Jinba'
Kwon, Young Soon ; Choi, Seong Youl ; Kil, Mi Jung ; You, Bong Sik ; Jung, Jae A ; Park, Sang Kun ;
Korean Journal of Agricultural Science, volume 40, issue 4, 2013, Pages 297~303
DOI : 10.7744/cnujas.2013.40.4.297
This study was carried out to examine the effect of Red LED (660 nm) and fluorescent lamp for night break (NB) treatments of each 3 hours (22:30-01:30), 4 hours (22:00-02:00) and 5 hours (21:30-:02:30) per day for 53 days on flower bud initiation and growth in Chrysanthemum cv. 'Baekma' and cv. 'Jinba'. The days to flower budding after short-day treatment in 'Baekma' was longer at fluorescent lamp 4 hr (21.0 days) and 5 hr (20.5 days) NB, and it was shorter at Red LED 3 hr (14.2 days). The days to flowering after short-day treatment in 'Baekma' was longer at fluorescent lamp 4 hr (54.0 days), 5 hr (53.5 days) NB, and Red LED 5 hr (53.3 days), and it was shortest at Red LED 3 hr (50.2 days) NB treatment among all treatments. The days to flower budding after short-day treatment of 'Jinba' was longer at fluorescent lamp 4 hr (20.6 days) and was shorter at Red LED 3 hr (14.1 days) among all treatments. Similarly, the days to flowering after short-day treatment of 'Jinba' was longer at fluorescent lamp 4 hr (55.3 days) and was shortest at Red LED 3 hr (50.2 days) among all treatments. Therefore, inhibition of flower bud initiation was the most effective under fluorescent lamp 4 hr treatment. The length of cut flower of 'Baekma' was increased by fluorescent lamp 4 hr, 5 hr, and Red LED 5 hr, but of 'Jinba' was longer at LED 4 hr and 5 hr treatment. The weight of cut flower of 'Baekma' was heaviest at fluorescent lamp 5 hr treatment and was at Red LED 5hr treatment for 'Jinba' even though there was not statistically significant difference between 'Baekma' and 'Jinba'. Consequently, under fluorescent lamp 4 hr for night break was the most effective on flower bud initiation, flowering inhibition and cut-flower characteristics in 'Baekma' and 'Jinba'.
Breeding of a scarlet single flowering freesia 'Dancing Flame' with early flowering and high yielding for cut flower
Cho, Hae Ryong ; Rhee, Ju Hee ; Lim, Jin Hee ; Kim, Mi Sun ; Park, Sang Kun ; Shin, Hak Ki ; Joung, Hyang Young ; Choi, Youn Jung ;
Korean Journal of Agricultural Science, volume 40, issue 4, 2013, Pages 305~309
DOI : 10.7744/cnujas.2013.40.4.305
A freesia (Freesia hybrida Hort.) 'Dancing Flame' was developed for the cut flower in the National Institute of Horticultural Herbal Science in 2007. This hybrid was selected from a crossing between a seedling 'Vulcano' and 'Sailor', which is scarlet double flowering and purple single flowering, respectively, and 'Figaro' which is bright red color and semi-double flowering, in 2000. Morphological characteristics of the selected hybrid were investigated for 3 years from 2005 to 2007, and then it was named 'Dancing Flame'. 'Dancing Flame' had red color (RHS R44B) and single flower with yellow center color (RHS Y9A). The growth of the plant was vigorous and the average height was 93.3 cm. The average flower width was 60 mm, number of floret per stalk was 14.3, and stalk was 13.2 cm length. The average yield, 7.8 cuttings per plant, was 2.5 stems per plant more than the control cultivar. The average days to first flowering of 'Dancing Flame', 133 days, was approximately 5 days earlier than the control cultivar. And its average yield, 7.1 cormlet per plant, was also 2.5times more than the control cultivar.
Effects of formulation types and application timing of benzobicyclon-mixture on weed control and phytotoxicity of rice
Won, Ok Jae ; Jeong, Jong Hee ; Song, Jae Eun ; Park, Su Hyuk ; Hwang, Ki Seon ; Han, Sung Min ; Pyon, Jong Yeong ; Park, Kee Woong ;
Korean Journal of Agricultural Science, volume 40, issue 4, 2013, Pages 311~316
DOI : 10.7744/cnujas.2013.40.4.311
This study was conducted to evaluate the efficacy of two different formulations and application timings of benzobicyclon+penoxsulam+pyrzaosulfuron-ethyl (BPP) in rice field. BPP granule (GR) and tablet (TB) controlled more than 90% of four weed species 10 and 15 days after sowing in direct seeding when compared with untreated control. BPP TB was highly effective to control herbicide resistant Scirpus juncoides and Monochoria vaginalis both 10 and 15 days after transplanting (DAT). BPP GR controlled 94.0 and 96.5% of S. juncoides and M. vaginalis, respectively 10 DAT, but its efficacy decreased to 88.5 and 49.8% respectively 15 DAT. When compared with untreated control, no visual injuries were detected at 255 and 510 g a.i./ha of BPP. The yield of rice increased in both BPP GR and TB in transplanting and direct seeding rice cultivation when compared with untreated control. Based on these data, early application (10 DAT) of BPP GR and TB can be applied to provide effective weed control, especially in the field infested with herbicide resistant weed species.
A field survey on roof ventilation system of single-span plastic greenhouse in cucurbitaceae vegetable cultivation
Yeo, Kyung-Hwan ; Yu, In-Ho ; Rhee, Han-Cheol ; Cheong, Jae-Woan ; Choi, Gyeong Lee ;
Korean Journal of Agricultural Science, volume 40, issue 4, 2013, Pages 317~323
DOI : 10.7744/cnujas.2013.40.4.317
This research was conducted to obtain the basic information for establishment of standard guidelines in the design and installation of roof ventilation system in single-span plastic greenhouse. To achieve this, the greenhouse structure & characteristics, cultivation status, and ventilation system were investigated for single-span greenhouse with roof ventilation system cultivating the Cucurbitaceae vegetables, watermelon, cucumber, and oriental melon. Most of single-span watermelon greenhouse in Haman and Buyeo area were a hoop-style and the ventilation system in those greenhouses mostly consisted of two different types of 'roof vent (circular or chimney type) + side vent (hole) + fan' and 'roof vent (circular type) + side vent (hole or roll-up type)'. The diameter of circular and chimney-type vent was mostly 60cm and the average number of vents was 10.5 per a bay with vent spacing of average 6.75m. The ratio of roof vent area to floor area and side vent area in the single-span watermelon greenhouse with ventilation fan were 0.46% and 7.6%, respectively. The single-span cucumber greenhouse in Haman and Changnyeong area were a gable roof type, such as even span, half span, three quarter and the 70.6% of total investigated single-span greenhouses was equipped with a roof ventilation fan while 58.8% had a circulation fan inside the greenhouse. The ratios of roof vent area to floor area in the single-span cucumber greenhouse ranged from 0.61 to 0.96% and in the case of the square roof vent, were higher than that of the circular type vent. On average, the roof ventilation fan in single-span cucumber greenhouse was equipped with the power input of 210W and maximum air volume of
, and the number of fans was 9.75 per a bay. The number of roof vent of single-span oriental melon greenhouse with only roll-up type side vent ranged from 8 to 21 (average 14.8), which was higher than that of other Cucurbitaceae vegetables while the vent number of the greenhouse with a roof ventilation fan was average 7 per a bay.
Growth response of Calla (Zantedeschia) to root zone environmental conditions in Highland
Nam, Chun-Woo ; Yoo, Dong-Lim ; Kim, Su-Jeong ; Suh, Jong-Teak ; Paek, Kee-Yoeup ; Lee, Sang Gyu ; Yoon, Moo Kyung ;
Korean Journal of Agricultural Science, volume 40, issue 4, 2013, Pages 325~331
DOI : 10.7744/cnujas.2013.40.4.325
This experiment has been carried out to determine optimal culture conditions for the production of cut flowers and tubers of Calla (Zantedeschia 'Golden Affair' and 'Black Magic') in highlands. Treatments consisted of various levels of root zone environments, Results are as follows: Calla 'Golden Affair' were grown with different mulching materials such as Non-mulching, Black film, reflective film, Rice hull. Mulching materials resulted in no difference in the number of cut flowers but flower length was highest in reflective film. Calla 'Black Magic' were treated with various soil water content, soil type and watering time. Number of cut flowers and flower quality were greatest when the plants were watered at -80 kPa soil water content. No symptoms of soft rot (Erwinia carotovora) was observed at this soil water content. The occurrence of soft rot was observed with similar percentage according to soil type and the soil water content. When Calla 'Black Magic' were watered at the time of soil surface drying, growth was greater compared to others. Air temperature and PPF affected plant growth and photosynthesis. Photosynthetic rate was greatest at
, while lowest at
. Soft rot did not occur without regard to dipping treatment (0, 5, 10, 24, 48 hours) when the day and night temperature were maintained at
Effects of different energy and rumen undegradable protein levels on dairy cow's production performance at mid-lactation period
Park, Su Bum ; Lim, Dong Hyun ; Park, Seong Min ; Kim, Tae Il ; Choi, Sun Ho ; Kwon, Eung Gi ; Seo, Jakyeom ; Seo, Seongwon ; Ki, Kwang Seok ;
Korean Journal of Agricultural Science, volume 40, issue 4, 2013, Pages 333~338
DOI : 10.7744/cnujas.2013.40.4.333
Sources of energy and rumen undegradable protein (RUP) have been used to meet nutrient requirements for high producing dairy cows. However studies for manipulation the levels of energy and RUP in diets have been mainly achieved using dairy cows at early-lactation period. The objective of this study thus, was to investigate the effects of different energy and rumen undegradable protein (RUP) levels on dry matter intake and milk yield in Holstein cows at mid-lactation period. Basal diet was prepared as TMR to meet nutrient requirements for dairy cows at mid-lactation according to NRC recommendation. Cows of control group (Con) were fed only basal diets while ground corn (0.5 kg/d), heat-treated soybean meal (0.5 kg/d), and their mixture (0.25 kg of each supplements/d) were added to diets for cows of treatment groups (T1, T2, and T3 respectively) to modulate the level of energy and RUP contents in diets. Addition of energy or RUP source in basal TMR did not affect in total DMI while TMR intake tended to be higher in Con compared to T3. Cows fed T3 diets tended to show increased milk yield and MUN content than those of Con. Cows for T2 as well as T3 had lower ADG (P<0.05) compared with those of Con. We concluded that the addition of RUP source in diets for dairy cows on mid-lactation period might cause the decrement of DMI and ADG.
Estimation of genetic parameter for carcass traits of commercial steers in Pyeongchang
Dang, Chang-Gwon ; Kim, Hyeong-Cheol ; Jang, Sun-Sik ; Lee, Jeong-Mook ; Hong, Yeong-Hun ; Jeon, Gi-Jun ; Yeon, Seong-Heum ; Kang, Hee-Seol ; Yang, Bo-Suk ; Hong, Seong-Koo ; Lee, Jun-Heon ; Lee, Seung-Hwan ;
Korean Journal of Agricultural Science, volume 40, issue 4, 2013, Pages 339~345
DOI : 10.7744/cnujas.2013.40.4.339
The objective of this study was to establish genetic evaluation systems with carcass data collected by 68 individual farms from 2007 to 2011 in Pyeongchang area of Kangwon province. All the possible of environment effects were corrected by analysis of variance (ANOVA) to estimate more accurate genetic parameters. Heritabilities and genetic correlations were estimated from carcass data collected from Hanwoo steers(n=10,441) born in Pyeongchang region from 2005 to 2008. Traits evaluated included carcass weight (CWT), eye muscle area (EMA), back fat thickness (BF) and marbling score (MS). As for the mean value and standard deviation for carcass traits, CWT, EMA, BF and MS were 424.5, 92, 13.7 and 5.7. Parameters were estimated using a multiple trait animal model and derivative-free restricted maximum likelihood procedures. Estimated heritabilities for CWT, EMA, BF and MS were 0.30, 0.21, 0.42 and 0.42, respectively. Genetic correlation of CWT with EMA, BF and MS were estimated to 0.24, 0.36 and 0.07, respectively. Genetic correlation of EMA with BF and MS was -0.27 and 0.61, respectively.
Genetic and of environmental effects for economic traits in pigs
Lee, Ill-Joo ; Hong, Joon-Ki ; Kim, Du-Wan ; Sa, Soo-Jin ; Kim, Young-Hwa ; Cho, Kyu-Ho ;
Korean Journal of Agricultural Science, volume 40, issue 4, 2013, Pages 347~351
DOI : 10.7744/cnujas.2013.40.4.347
This study was conducted to estimate the effect of sex, breed and on the basis of the records on 300 pigs of Duroc, Landrace and Yorkshire breeds raised at the National Institute of Animal Science. Yorkshire was observed to be superior to other breeds between 90 to 110 kg of body weight. Thicker backfat was estimated in the B-mode than in A-mode of 110 kgs range than in 90 kgs. Loin eye muscle area was larger in the final weight of 110kg than in 90 and the Duroc had significantly (p<0.05) larger loin eye muscle area than other breeds. Thinner backfat was observed in males than in females in both modes of backfat measurements and in both of the final weights of test. Females had significantly larger loin eye muscle area than males, and the difference between the two sexes were larger in the final weight of 110 kg than in 90 kg. Analysis models concluded that backfat thickness certainly influences the body weight gain when at 90 kgs and 110 kgs analysed with A-mode and B-mode respectively.
Potential functional roles of follistatin on bovine somatic cell nuclear transfer embryos
Lee, Kyung-Bon ; Woo, Jae-Seok ; Lee, Bo-Myoung ; Park, Kang-Sun ; Han, Kil-Woo ; Kim, Min Kyu ;
Korean Journal of Agricultural Science, volume 40, issue 4, 2013, Pages 353~358
DOI : 10.7744/cnujas.2013.40.4.353
To demonstrate that follistatin treatment enhances the efficiency of nuclear transfer (SCNT), cell allocation and preimplantational development were determined in bovine SCNT embryos in the present study. Treatment of activated SCNT embryos with 10 ng/ml follistatin significantly increased the proportion of blastocyst development compared to untreated SCNT embryos. In addition, an increase in trophectoderm (TE) cell numbers and relatively higher proportion of TE cells to total cells were observed, but the number of inner cell mass (ICM) cell and total cell numbers were not changed (P < 0.05). No significant effect of other doses of follistatin was observed for the above endpoints. However, treatment with 1 and 10 ng/ml follistatin reduced the proportion of nuclear transfer blastocysts with an ICM ratio of > 60% relative to untreated nuclear transfer blastocysts at Day 7. No significant effect of follistatin treatment on proportions of nuclear transfer blastocysts with ICM ratio of 20-40% or 40-60% was observed. Taken together, these results suggested that follistatin can be used to increase developmental competence of SCNT embryos in terms of cell allocation, particularly TE cells, during preimplantation stages, subsequently enhancing placentation and birth of live offspring.
Reduction in antigenesity of whey protein by alcalase
Yu, Jae-Min ; Renchinkhand, Renchinkhand ; Bae, Hyoung Churl ; Jeong, Seok Geun ; Paik, Seung-Hee ; Nam, Myoung Soo ;
Korean Journal of Agricultural Science, volume 40, issue 4, 2013, Pages 359~365
DOI : 10.7744/cnujas.2013.40.4.359
The aim of this study was to produce enzymatic hydrolysis of
-LG and BSA with alcalase for the possible application of hypoallergenic foods toward cow's milk allergenic infant. The molecular weights of most of the peptides in hydrolysates from
-LG and BSA by alcalase were below 3,000 dalton. Antigenesity of
-LG and BSA hydrolysates to rabbit anti-
-LG antiserum and BSA antiserum were remarkably decreased by more than
at 20% inhibitionrate. Antigenesity of polyvalent antigenic peptide in
-LG and BSA hydrolysates to specific rabbit anti-
-LG antiserum and BSA antiserum was determined by PCS test using guina-pig. Hydrolysates of
-LG and BSA with less than 3,000 dalton did not show polyvalent antigenic reaction against rabbit antiserum. Hydrolysates of
-LG and BSA could be a source for the manufacturing of hypoallergenic food.
Enzymatic synthesis of asymmetric structured lipids containing 1,2-disaturated-3-unsaturated glycerol using acyl migration
Hyeon, Jin-Woo ; Lee, Ki-Teak ;
Korean Journal of Agricultural Science, volume 40, issue 4, 2013, Pages 367~375
DOI : 10.7744/cnujas.2013.40.4.367
The enzymatic interesterification was performed to produce structured lipids (SLs) with palm mid fraction (PMF) and stearic ethyl ester (STEE) for 1, 3, 6, 9, 12 and 15 hr at
. The reaction was catalyzed by Lipozyme TLIM (immobilized lipase from Thermomyces lanuginosus, amount of 20% by weight of total substrates) in a shaking water bath set at 180 rpm. The optimum condition for synthesis of asymmetric SLs were: substrate molar ratio 1:0.5 (PMF:STEE, by weight), reaction time 6 hr, enzyme 20% (wt%, water activity=0.085) of total substrate and reaction temperature
. After reaction at optimized condition, triacylglycerols (symmetrical and asymmetrical TAGs) from reactants were isolated. POP/PPO (1,3-palmitoyl-2-oleoyl glycerol or 1,2-palmitoyl-3-oleoyl glycerol), POS/PSO (palmitoyl-oleoyl-stearoyl glycerol or palmitoyl-stearoyl-oleoyl glycerol), SOS/SSO (1,3-stearoyl-2-oleoyl glycerol or 1,2-stearoyl-3-oleoyl glycerol) were obtained by solvent fractionation. Finally, refined SLs contained stearic acid of 16.91%. Solid fat index and thermogram of the refined SLs were obtained using differential scanning calorimetry. The degree of asymmetric triacylglycerol in the refined SLs was analyzed by Ag-HPLC equipped with evaporated light scattering detector (ELSD). The refined SLs consisted of symmetric TAG of 41.15 area% and asymmetric TAG of 58.85 area%.
Quality characteristics of short bread cookies with added green whole grain rice powder
Paik, Seung-Hee ; Lee, Eui-Seok ; Hong, Soon-Taek ; Ku, Ja-Hyeong ; Nam, Myoung Soo ;
Korean Journal of Agricultural Science, volume 40, issue 4, 2013, Pages 377~383
DOI : 10.7744/cnujas.2013.40.4.377
Premature-green rice is typically obtained by early harvest when culms of rice still appear green in color, and the rice and its food products have been considered as wellbeing foods. This study was carried out to determine the quality characteristics of cookies made from flour added with 10, 20, and 30% whole green rice powde r(WGRP) of two kinds of Hopum and Shinsun waxy rice. The quality characteristics of cookies, including pH, spread factor, color, hardness, and sensory properties, were estimated. WGRP with different levels of 10, 20, and 30% was added into powder for preparing cookies, and their quality properties were evaluated. The pH and hardness of the cookies increased, while spread factor showed highest added with 20% Hopum and Shinsun waxy rice. The color (L) of cookies decreased 20% added with Hopum and Shinsun waxy rice. The sensory properties of cookies was highest added with 20% Hopum and 10% Shinsun waxy rice. The result of this study suggest that addition of 20% Hopum and 10% Shinsun waxy rice are available rice cookies. It was concluded that WGRP may have a potential in bakery industry as a new food material.
Strategic improvement of short-term agricultural machinery rental system using importance performance analysis
Hong, Soon-Jung ; Huh, Yun-Kun ; Chung, Sun-Ok ;
Korean Journal of Agricultural Science, volume 40, issue 4, 2013, Pages 385~394
DOI : 10.7744/cnujas.2013.40.4.385
Short-term agricultural machinery rental system has been operated by agricultural extension organization of local government (agricultural technology center) and sponsored by Ministry of Agriculture, Food, and Rural Affairs, to improve utilization efficiency and save agricultural production cost through joint utilization of agricultural machinery. This study was conducted to analyze current status of the rental system operation and provide recommendations for future direction. Question survey was conducted for officers in charge of the rental system in the technology center, and strategic improvement was suggested through importance performance analysis (IPA). Survey results showed that 11 issues should be reformed or improved by 2015, which is not practically feasible. IPA analysis resulted that administration and manpower support, cooperation between federal and local organizations, and cooperation with other organizations should be focused for successful operation of the rental system. Issues that seem to happen after 2015 need to be handled as future research.
Performance analysis of an experimental plant factory
Ryu, Dong-Ki ; Kang, Sin-Woo ; Chung, Sun-Ok ; Hong, Soon-Jung ;
Korean Journal of Agricultural Science, volume 40, issue 4, 2013, Pages 395~403
DOI : 10.7744/cnujas.2013.40.4.395
Plant factory has drawn attention in many countries in the world due to capability of environmental control not only for better yield and quality, but also for increase in functional and medicinal components of the products. In this paper, an experimental plant factory was constructed for various tests under different environmental conditions, and the operations were evaluated. A production room was constructed with adiabatic materials with dimensions of
). Four sets of
) production frame unit, each with 9 light-installed beds and an aeroponic fertigation system, resulting in 36 beds, were prepared. Accuracy and response were evaluated for each environmental control component with and without crops. Air temperature, humidity,
concentration, light intensity, frequency, and duty ratio, fertigation rate and scheduling were controllable from a main control computer through wireless communication devices. When the plant factory was operated without crop condition, the response times were 8 minutes for change in temperature from 20 to
and 20 minutes from 15 to
; 7 minutes for change in humidity from 40 to 65%; and 4 minutes for change in
concentration from 450 to 1000 ppm. When operated for 24 hours with crop cultivation; average, maximum, and minimum values of temperatures were 20.06, 20.8, and
; humidity were 66.72, 69.37, and 63.73%;
concentrations were 1017, 1168, and 911 ppm, respectively. Photosynthetic Photon Flux Density was increased as the distance from the light source decreased, but variability was greater at shorter distances. Results of the study would provide useful information for efficient application of the plant factory and to investigate the optimum environment for crop growth through various experiments.
The analysis on the production and consumption of red-pepper in Korea
Hong, Seungjee ; Kim, Sounghun ;
Korean Journal of Agricultural Science, volume 40, issue 4, 2013, Pages 405~410
DOI : 10.7744/cnujas.2013.40.4.405
Even though red pepper is one of the most important agricultural products in Korean, the red pepper industry is decaying due to several reasons. In order to solve this problem, more specific studies are required. The purpose of this paper is to analyze the production and consumption sector of Korean red pepper market and to present the implications for the promotion of Korean red pepper industry. Survey analyses to producers and consumers were conducted for this research. The results of studies present a few findings: First, Korean consumers consume foreign red pepper products as well as domestic red pepper products, Second, more RPPC (Red Pepper Processing Complex) should be introduced, Third, WTP (Willingness To Pay) of consumers to red pepper products is different from WTP of producers, Forth, Consumers' requirements to promote the red pepper market is also different from producers' strategies.
The analysis on the production of bean curd industry in Korea
Kim, Sounghun ; Lee, Kyei-Im ; Choi, Ji-Hyeon ;
Korean Journal of Agricultural Science, volume 40, issue 4, 2013, Pages 411~416
DOI : 10.7744/cnujas.2013.40.4.411
In Korea, bean curd is one of most important foods and bean curd industry keeps growing. Korean bean curd industry has complicated structure with a few large-scale manufacturers and many small-size manufacturers, which causes difficulty in figuring the strategy for the promotion of bean curd industry. In order to solve this problem, more specific studies are required. The purpose of this paper is to analyze the production sector of Korean bean curd and to present the implications for the promotion of Korean bean curd industry. Survey analyses to producers was conducted for this research. The results of studies present a few findings: First, the solution for the easier purchase of raw material (soybean) should be prepared. Second, the support for marketing as well as R&D to small-size manufacturers is required. Third, the monitoring and controlling of unfair trading in bean curd market should be strengthened. Forth, the certification programs for the bean curd products should be managed.
Comsumer analysis for Korean agro-food in China
Shon, Chang-Soo ; Ko, Jinjoo ; Kim, Sounghun ;
Korean Journal of Agricultural Science, volume 40, issue 4, 2013, Pages 417~423
DOI : 10.7744/cnujas.2013.40.4.417
Recently, there is the huge interest to promote the export of Korean agro-food to Chinese market. However, small number of papers analyze the Chinese consumer to find the strategy for launching Korean agro-food in Chinese market. The purpose of this paper is to analyze Chinese consumer for Korean agro-food in Chine. Survey analysis was conducted in 4 big city (Beijing, Shanghai, Guangzhou, and Tsingtao) for this research. The results of studies present a few findings: First, many Chinese consumers prefer Korean agro-food. Second, among big cities, Beijing shows the highest level of preference for Korean agro-food, Third, Chinese consumers can pay higher price for Korean agro-food, Fourth, Chinese consumer usually buy small amount of agro-food. Fifth, the image of Korea is also important to promote the exportation of Korean agro-food to Chinese market.
Outlook for consumption of subtropical vegetables and required cultivation area
Lee, Hong-Jin ; Kim, Sung-Yong ; Kim, Yun-Sik ; Jeon, Sang-Gon ;
Korean Journal of Agricultural Science, volume 40, issue 4, 2013, Pages 425~434
DOI : 10.7744/cnujas.2013.40.4.425
Nowadays, the korean peninsula has endured weather changes toward to the subtropical climate. Also demographical structure has changed into multi-cultural society in which many people from subtropical areas have immigrated into Korea. Therefore, consumption and production of subtropical vegetables become important. For the analysis, we choose eight important subtropical crops. EDM (Equilibrium Displacement Model) with many parameters and elasticities is used for the forecast of consumption and required cultivation area. The simulation focuses on the changes of the number of foreign workers and immigrated women in Korea to predict the quantity of consumption and required area in Korea. The results show that we need additional land area about 581~1,065 ha for the cropping subtropical vegetables in Korea. Finally, these required area can be provided by the cities and counties in coast area in Gyeongsangnam-Do, Jeonranam-Do and Jeju-Do. Climate change will be continued in the future. Together with climate change, the change of demographical structure into multi-culture may increase consumption and production of subtropical vegetables. Forecasting of increased consumption and required cultivation area for subtropical vegetables is significant.