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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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KOREAN JOURNAL OF CROP SCIENCE
Journal Basic Information
Journal DOI :
The Korean Society of Crop Science
Editor in Chief :
Volume & Issues
Volume 48, Issue 6 - Dec 2003
Volume 48, Issue 5 - Dec 2003
Volume 48 - Dec 2003
Volume 48, Issue 4 - Sep 2003
Volume 48, Issue 3 - Jun 2003
Volume 48, Issue 2 - Jun 2003
Volume 48, Issue 1 - Mar 2003
Selecting the target year
Mapping of RFLP Markers Linked to Bacterial Blight Resistant Genes (Xa-1, Xa-3) in Rice
KOREAN JOURNAL OF CROP SCIENCE, volume 48, issue 6, 2003, Pages 419~423
Bacterial blight caused by Xantomonas oryzae pv. oryzae is one of the most serious diseases of rice especially in southern area of Korea. Three races,
, are the most dominant species. lo improve rice breeding efficiency using marker assisted selection, some RFLP markers were surveyed for polymorphism between resistant and susceptible to
. And, 127 doubled-haploid (DH) lines derived from Milyang121/HRl1650-1-4-2 and 131 DH lines derived from Milyang123/HR10624-AC5 were evaluated to bacterial blight (
). Milyang121 and HR10624-AC5 have Xa-1, resistant to
race, and Milyang123 has Xa-3, resistant to
race. Three markers, RZ590, RZ536 and RG303, showing polymorphism between parents and resistance gene, Xa-1 and Xa-3, were analysed in the two combinations of DH lines. The segregation pattern of resistant DH population of Milyang123/HR10624-AC5 to susceptible showed 3:1 and 1:1 in
race. In three RFLP markers, RZ590 was linked to Xa-1 on chromosome 4, and RZ536 and RG303 were linked to Xa-3 on chromosome 11. The map distance between Xa-1 and RZ590 was 3.1cM on chromosome 4, and Xa-3 and RZ536/RG303 were 7.6/16.0cM on chromosome 11, respectively. The results of RFLP mapping will be useful for the selection and pyramiding of bacterial blight resistant genes.
Seed Production Method for Waxy Corn Hybrid, Chalok 2
KOREAN JOURNAL OF CROP SCIENCE, volume 48, issue 6, 2003, Pages 424~428
This study was conducted to find out the optimum cultural method for hybrid seed production of Chalok 2. Higher seed yield was obtained when KW3 was used as a seed parent (female). KW7 was shown Higher barren stalk occurrence which caused significant seed yield reduction when it was used as a seed parent (female). The ratio of female (KW3) to male (KW7) rows with 4 to 1 had higher seed yield than that of 2:1 or 3:1. In case of using KW3 toy a seed parent, KW3 was susceptible to stem and ear rotting disease. The 35th day after silking was optimal period to harvest due to higher 100-grain weight, lower rotten grain, and higher germination rate.
tans-Resveratrol Content of Varieties and Growth Period in Peanut
Lee, Mi-Ja ; Cheong, Young-Keun ; Kim, Hyung-Soon ; Park, Ki-Hun ; Doo, Hong-Soo ; Suh, Duck-Yong ;
KOREAN JOURNAL OF CROP SCIENCE, volume 48, issue 6, 2003, Pages 429~433
trans-Resveratrol(3,5,4'-trihydroxystilbene) is phenolic compound present in grapes, wines, and peanuts, has been reported to have health benefits including anticarcinogenic effects, protection against cardiovascular diseases and reduced cancer risk. A simple method for the quantitative extraction of trans-resveratrol from peanut has been developed. Optimal conditions for extraction were investigated. Type of solvent, time, and temperature assayed influenced trans-resveratrol yield. Adequate extraction condition was decided to ethanol/water (80:20v/v) maintained at
for 45 min. After extraction, the protocol consists of sample preparation using a
solid-phase extraction (SPE) cartridge after concentrate with rotary evaporator and quantified by reversed phase HPLC using a
column at 308 nm. Analytical methods for measuring trans-resveratrol in peanut were adapted to isolate, identify, and quantify trans-resveratrol in 11 peanut varieties by HPLC (high-performance liquid chromatography) with UV detector, The 11 peanut varieties content ranged from 0.018 to 1.125
with an average of 0.289
. The contents were higher in the seeds with than without testa, regardless of varieties. The trans-resveratrol content was Higher in 110, 130 days after sowing than that of other period.
Growth Characteristics of Dendropanax morbifera
in Wando Area of Korea
KOREAN JOURNAL OF CROP SCIENCE, volume 48, issue 6, 2003, Pages 434~437
This study was carried out to obtain basic information for environment of native area and growth characteristics under various mulching materials in Dendropanox morbifera
, Dendropax c morbifera was grown wild at Wando area, particularly, distribution frequency was high at 20 to 280 meters above the sea level, and configuration of the ground of native area descended slowly toward the southeast. The soil characteristics of native area was pH 5.3-5.5, 8.8-9.5% in organic matter content and 19.8-22.0% in soil moisture. Growth of Dendropanox morbifera
, was accelerated by transparent polyethylene film and black polyethylene film mulched.
In vitro Propagation using Shoot Tip Culture of Curcuma longa L.
KOREAN JOURNAL OF CROP SCIENCE, volume 48, issue 6, 2003, Pages 438~441
The present study was carried out to assess the possibility of rapid multiplication of Curcuma longa Linne through in vitro culture of shoot-apex. The factor investigated was effect of various growth regulators on shoot-apex culture. The shoot-apex cultured of MS(Murashige and Skoog) medium developed into plantlet in 16 Weeks. M.S. medium containing NAA at 0.5 ppm and BA 5.0 ppm was found to be optimal for growth of in vitro plantlet
Genetic Analysis of Quantitative Trait for Flowering Habits by Diallel Crosses in Sesame
Mun Sik Shin ;
KOREAN JOURNAL OF CROP SCIENCE, volume 48, issue 6, 2003, Pages 442~446
The Gene action for eight quantitative characters related to the plant type was estimated using diallel cross among three different plant types of sesame (Sesamum indicum L.) in 2001. The parental varieties used for diallel cross were Ahnnam and Yangbaeck as indeterminate type, ksan22 as semi-determinate type, and dt-45 and Suwon131 as determinate type. In variance and covariance analysis (Wr-Vr) for eight characters the mean square of array except for capsule length, 1,000 seed weight were significant, which suggest that varieties involved in diallel set cross may have epitasis. Complete dominance was observed in the flowering periods, and ratio of matured grains while partial dominance was observed in the plant height, no. of capsules per plant, and no. of branch per plant. Broad sense heritability for flowering periods, plant height, no. of capsules per plant, and no. of branch per plant ranged from 0.91 to 0.99. Narrow sense heritability for flowering periods, capsule length, ratio of matured grain, 1,000 seed eight were 0.18 to 0.34, and plant height, no. of capsules per plant and no. of branch per plant were ranged 0.77 to 0.81.
Growth and Green Pod Yield by Sowing and Acclimation Dates in Autumn Green Pea
KOREAN JOURNAL OF CROP SCIENCE, volume 48, issue 6, 2003, Pages 447~451
When sowing green peas in the autumn, proper seedling stands and growth quantity should be secured before winter begins. Also, for proper acclimatization, injuries caused by low temperatures, frost or high temperatures in the P.E. film during mulching, should be avoided during the regeneration period; that being early spring. The days required for growth in each stage in Yeosu are shorter than those in Naju because Yeosu has high temperatures during the growth period. Furthermore, in Yoesu, it was observed that there were more effective branches as well as effective and attached node positions on the branches. The first pods on the main stems and effective branches were observed to be higher than those in Naju. The number of pods per plant and the number of seeds per pod in Yoesu was greater than for those in Naju and the pod length was longer as well. Considering the missing plant rate, growth, and green pod yield, the optimum sowing date for the green pea was mid-November in both location. The stable acclimatizing date for the green pea was early March when the highest yield can be acquired due to a lot of effective branches and pods per plant and with the lowest missing plant rate and rate of injury in acclimatization.
Cropping Systems for Vegetable Peanut and Environmental Effect of Residue Incorporation in Soil
KOREAN JOURNAL OF CROP SCIENCE, volume 48, issue 6, 2003, Pages 452~459
A new demand for vegetable peanut (Arachis hypogaea L.) in Korea has increased farmers interest in growing vegetable peanut. Compared to grain peanut production, vegetable peanut production enables the growth period to be shortened by 20 or 30 days and farmers to adopt various cropping systems and to return crop residues in the soil. With the purpose of establishing desirable cropping systems for sustainable vegetable peanut production, three field experiments were conducted from 2000 to 2001 at Milyang, the southeastern part of Korea. Main focuses were given into the effect of cropping systems for vegetable peanut production on each crop's yield and soil sustainability. The cropping systems investigated were single vegetable peanut, peanut-radish-green barley, peanut-barley, and peanut-garlic cropping system, with or without crop residue incorporation in the soil. Among the cropping systems investigated for sustainable vegetable peanut production, peanut-only and peanut-radish-green barley cropping systems showed vulnerable to diseases and lodging while peanut-barley and peanut-garlic cropping systems showed higher stability in response to diseases and lodging, consequently leading to higher yield potential of vegetable peanut production. In the peanut-barley cropping system, both barley and peanut residues returned to the soil played an important role in soil improvement as well as in significantly increased grain yield of peanut and barley. A particular notice was taken to the pronounced increase in Trichoderma population and the amount of nitrogen mineralization induced by the returned barley residue. Soil structure, compactness, pH, and fertility were positively influenced by the returned crop residues, which apparently increased sustainability in vegetable peanut production systems.
Effect of Light Quality on Seedling Emergence, Growth and Photosynthesis of Rice
KOREAN JOURNAL OF CROP SCIENCE, volume 48, issue 6, 2003, Pages 460~464
White spunbonded fabrics has been utilized toy covering in rice seedling nursery. This study, therefore, was carried out to examine the effect of light quality on seedling emergence, growth, morphology, chlorophyll content and photosynthesis to get the information on the color of the fabrics. Blue, red and far-red lights were treated immediately after sowing seeds of three cultivars, Dongjinbyeo, Ilmibyeo and Daesanbyeo. Seedling emergence, growth and morphology, chlorophyll content and photosynthetic rate were measured. Seedling emergence rate of Dongjinbyeo and Daesanbyeo was low under far-red light treatment compared to those under blue and red light ones. Although the rate of Ilmibyeo was not different from three light treatments. Far-red light treatment showed similar response in plant height and leaf length, but yee light increased number of roots. Shoot and root dry weight was the highest in blue and red light treatments, respectively. Total dry weight, however, was the lowest under far-red light treatment. While chlorophyll content and photosynthetic rate of the three cultivars did not showed consistent response, those were the greatest under red light treatment, and were decreased in order of blue and far-red light treatment.
Effect of NaCl Treatment on Absorption of Inorganic Nutrient and Growth in Rice
KOREAN JOURNAL OF CROP SCIENCE, volume 48, issue 6, 2003, Pages 465~468
In order to find out the basic information for salt tolerance in vice (Oryza sativa L.), effects of NaCl treatment on absorption of inorganic components and growth were investigated in 6 japonica and 5 tongil varieties and compared to the salt tolerance variety, Annapurna. The absorption of N and
was less repressed than that of
, MgO, CaO, and
which were a little affected by NaCl treatment.
was the most highly repressed component in the absorption of inorganic components, followed by MgO, CaO, total-N,
content was increased about twenty times to the control at 30days after NaCl treatment, and tonsil varieties more than absorbed japonica ones. Dry weight of japonica varieties by NaCl treatment was less reduced than that of tonsil varieties, followed by Seomjinbyeo, Sinseonchalbyeo, Nakdongbyeo, Daechoungbyeo, Dongjinbyeo and Chuchoungbyeo in japonica group, and Milyang30, Gayeabyeo, Jangseongbyeo, Chilseongbyeo and Taebackbyeo in tonsil group. The relationship between dry weight reduction and Na/K ratio showed positively significant correlation in rice.
Genotypic Difference in Tocopherol and Tocotrienol Contents of Rice Bran
KOREAN JOURNAL OF CROP SCIENCE, volume 48, issue 6, 2003, Pages 469~472
The rice bran has been known to contain tocopherols and tocotrienols carrying antioxidant and cholesterol-lowing activities. The content of 8 isomers of vitamin E :
tocoperols (T) and tocotrienols (
) were extracted from 18 major rice varieties and quantified with an HPLC. Tested varieties exhibited T,
and total vitamin E (
) contents ranging 9.1-14.8, 22.4-37.1, 34.9-46.5 mg/100g with averages of 11.1, 28.0, 39.2 mg/100g, respectively. Among tested varieties, Seojinbyeo and Hwasungbyeo showed high T contents and Andabyeo, Damakum were high in
, and Andabyeo and Seojinbyeo were high in total
contents. Regardless of varieties, the average 8 isomer contents (in mg/100g) were in descending order of
T (7.8) ＞
T (0.1). In most varieties,
, a strong antioxidant and anticancer compound, consisted 64% of total tocotrienol and 46% of total vitamin E in vice bran.
Effect of Free-Ranging Time on Duck Behavior Patterns and Rice Yield in Integrated Rice and Duck Farming
KOREAN JOURNAL OF CROP SCIENCE, volume 48, issue 6, 2003, Pages 473~478
This study was conducted to clarify the effects of duck free-ranging time on the growth and behavior patterns of duck, pH and dissolved oxygen of irrigation water, and growth and yield of the rice plants in paddy fields. Two paddy fields with each 5 aye were used for 12 hours duck free-ranging plot (12HFR) and 24 hours duck free-ranging plot(24HFR). Body weight gain of the duck was not different between 12HFR and 24HFR. Eating and feather grooming behavior in the 12HFR were significantly longer than those of 24HFR, but other behavior patterns were not so. Working behavior and activities of duck in paddy fields tended to be longer in the 12HFR than in 24HFR. However, any difference was not found on staying time of duck in paddy fields. Although it was not statistically significant, pH and dissolved oxygen of irrigation water tended to be higher in the 12HFR than in 24HFR. The plant height of rice in the 12HFR was significantly shorter than that of 24HFR during the latter half period. The number of tillers per hill was significantly increased in the 24HFR than in 12HFR. The shoot dry weight of rice in the 12HFR was significantly less than in the 24HFR during the heading stage of rice plant, but the root dry weight was not different. The number of spikelets per panicle was significantly less in the 12HFR than in 24HFR, however the percentage of ripened grains was significantly higher in the 12HFR. The yield of rice was not significantly different between the treatments. In conclusion, the free-ranging time of duck for 12 hours in paddy fields promoted eating and working behavior of the ducks. Free-ranging time did give effects on rice traits such as the number of tillers per hill, plant height, shoot dry weight of the rice plant, and spikelet number and percentage of ripened grain. However, the duck growth, pH and dissolved oxygen of irrigation water, and paddy rice yield were not affected by duck free-ranging time. These results might suggest that almost same effect as in 24 hours of free-ranging can be obtained with only 12 hours of free-ranging in daytime.
Varietal Differences and Time Course Changes in Greenness Values in Rice Leaf
KOREAN JOURNAL OF CROP SCIENCE, volume 48, issue 6, 2003, Pages 479~483
Knowledge of N accumulation during the vegetative growth stage of rice (Oryza sativa L.) is useful for determining the need for topdressing fertilizer N at panicle initiation and booting stage. The chlorophyll content showing SPAD threshold values generated by a simple and portable diagnostic instrument, chlorophyll meter, enables implement the measures of greenness and/or relative chlorophyll contents of leaves. Two-year field experiment was conducted to evaluate the possible application of the chlorophyll meter for N diagnosis in transplanted paddy rice. The chlorophyll meter threshold values (SPAD reading) were taken from uppermost fully expanded leaves at 10days interval from 10 days after transplanting. SPAD readings and N contents of rice leaf blade were closely related at the maximum tillering stage. SPAD readings during growth period showed M-shaped distribution, sharply finished to drop at 20 days after heading date. As N fertilizer increased, the SPAD readings increased. The SPAD readings showed more critical and clear difference in immature paddy field than in ordinary paddy field, where the former soil showed higher response to N fertilizer topdressed. Based on the PAD readings for obtaining an optimum sink size bearing the maximum grain yield, N fertilizer to be dressed at the panicle initiation stage is to be adjusted within the SPA
tillers value range 888 in ordinary paddy, and 800 in immature paddy vice. Among the cultivars tested, Huckhyangbyeo, Jinpumbyeo, Ansungbyeo, Sobibyeo, Manpungbyeo, Sangmibyeo, Jinbongbyeo, showed high SPAD values, whereas the cultivars, Nonghobyeo, Saechuchungbyeo, Hwabongbyeo, Mananbyeo, did low values and others intermediate SPAD threshhold values.
Spatial Distribution of Rice Root under Long-term Chemical and Manure Fertilization in Paddy
KOREAN JOURNAL OF CROP SCIENCE, volume 48, issue 6, 2003, Pages 484~489
It is well known that root distribution of rice is a crucial factor for nutrient absorbtion and affect by soil fertility management. However, the findings on root distribution are limited due to laborious and tedious work. The characteristics of root distribution were investigated in long-term fertilizer experiment plots that were established in paddy soil, a fine silty family of typic Hal-paqueps (Pyeongtaeg series) in 1967. fertilizer experiment plots of no fertilizer, compost, NPK and NPK+compost plot have been maintained consistently for the past thirty six year and Npk+silicate plot for the past twenty two years. In NPK plot, 150kg N (urea), 100kg -
(fused phosphate) and 100kg
(potassium chloride) per hectare have been applied. For NPK+silicate plot, 500kg
(silicate) was applied in addition to fertilizer in NPK plot. For the compost plot, 10,000kg rice straw compost per hectare were applied. Root samples were taken from the positions of hill-center (below hill) and mid-point of four adjacent rice hills at heading stage by cylinder monolith (CM) method. The soil cores were sampled 20cm depth from the soil surface and partitioned four into layers at an interval of 5cm. The soil particles surrounding roots were washed out with tap water, Length and weight of the roots in each soil layer were measured and root length density (RLD), root weight density (RWD), specific root length(SRL) and rooting depth index (RDI) were calculated. Total root length was measured by intersection method. Plant height, tiller and shoot dry weight were the highest in NPK+compost plot. But RLD of hill-center soil cores was the highest in no-fertilizer plots. In the soil cores from mid-point position of four adjacent hills, RLD at 15-20cm soil depth was higher in compost plot than NPK plot. RLD in compost plots showed even distribution compared to those in chemical- fertilizer plots. RWD was the highest in the NPK+compost plot. SRL was the lowest in the NPK+silicate plot. RDI was the highest in the compost plot. Also, in this experiment it was found that the distribution of roots was closely related to the physical properties of the soil as affected by fertilization management.
Flowering Response According to Different Seeding Dates and Day-length Treatment in Perilla
KOREAN JOURNAL OF CROP SCIENCE, volume 48, issue 6, 2003, Pages 490~494
To understand flowering response under diverse day-length condition and the movement of floral stimulus, we used six perilla accessions which showed diverse days to flowering. Though the growth phase was reported as irreversible between vegetative and reproductive stage, perilla showed reversible growth phase according to day length increase in May and June. When it sowed in March, flowering response was started in early May and vegetative and reproductive phase was coexisted in late June. When a part of a perilla plant was treated under short day condition, only apical buds on main stem or branches were flowered but other long day conditioned apical buds were not flowered. With this result it is suggested that the floral stimulus can not be transferred to other part of perilla.
Practice in Dual-purpose Barley for Forage and Grain with Early-sown Barley having Different Winter Habits
KOREAN JOURNAL OF CROP SCIENCE, volume 48, issue 6, 2003, Pages 495~500
To establish the dual-purpose barley cultivation for forage by clipping before overwintering and grain next year, an experiment was conducted to clarify the effect of clipping times and cultivars haying different winter habits in rice-barley cropping system at paddy field in southern Korea. Barley showed more forage yield by clipping once only on December 10 than that of twice-clipping on November 10 and December 10. Among experimented cultivars, Saegangbori (winter habit II) and Keunalbori (winter habit IV) produced higher forage yield in one time clipping than the others. On the contrary, higher total digestive nutrients(TDN) was gained from twice-cut plants. Barley clipped once or twice headed and matured without serious delay as compared to the conventionally sown barley. In spite of clipping in November and/or December, barley produced grain yield similar to that of the conventional. Conclusively, it was regarded that cultivars having II-III winter habit were suitable for dual-purpose barley cultivation for forage in winter season and grain harvest next year
Growth Characteristics and Grain Quality of Naked Barley Infected by Barley Yellow Mosaic Virus
KOREAN JOURNAL OF CROP SCIENCE, volume 48, issue 6, 2003, Pages 501~505
The growth characteristics and damage of naked barley infected with barley yellow mosaic virus (BaYMV) were investigated between resistant and susceptible varieties in habitual field plot of BaYMV BaYMV of the barley plants with typical disease symptom were identified by enzyme linked immunosorbent assay (ELISA) test. The visual degree (0-9) based on disease symptoms of BaYMV was different as 9 and 1 between susceptible variety Baegdong and resistant variety Naehanssalbori, respectively. Susceptible variety, Baegdong showed significant damage in culm length, number of kernel per spike and tiller per square meter but not in 1,000 kernel weight, so these results caused yield reduction to only 80% comparing to the control. Seed germination did not affected by BaYMV infection both in susceptible and resistant variety. In grain quality test, abortive grain yale and crude protein content were significantly increased compared to the control. The relationships between BaYMV infection and growth characteristics showed the negative correlations in culm length, number of tiller, 1000 kernel weight and yield, but it showed the positive correlation in crude protein contents. These results implied that BaYMV can affect not only barley growth and yield but grain quality.
Changes in Physiological Characteristics of Barley Genotypes under Drought Stress
KOREAN JOURNAL OF CROP SCIENCE, volume 48, issue 6, 2003, Pages 506~515
Six barley varieties that showed different degree of drought tolerance were grown with and without drought stress treatment (control), and investigated for the temporal changes in growth and several physiological traits after drought treatment. Soil water potential was -0.05 ㎫ at the initial stage of drought treatment and dropped to -0.29 ㎫ at 19 days after withholding irrigation. Soil water potential (SWP) maintained at -0.05 ㎫ in the control. The dry weight (DW) under the drought treatment were reduced compared to the control as follows: Dicktoo-S (short awn), 69% ; Dicktoo-L (long awn), 70%; Dicktoo-T (tetra), 86%; Dongbori-1, 69%; Suwonssalbori-365, 55% and Tapgolbori, ,37%. Dicktoo lines and Dongbori-1 were more tolerant than Suwonssalbori-365 and Tapgolbori. Leaf relative water contents (RWC) and leaf water potential (LWP) decreased obviously under the drought condition, the decrease being greater especially in the less drought-tolerant barley genotypes. Dongbori-1 and Dicktoo-L in drought treatment showed net photosynthesis of 38% and 17% compared to the control, respectively, and the other four genotypes much lower photosynthesis of 1.1% to 7.0%. Stomatal conductance, mesophyll conductance, and the photochemical efficiency (Fv/Fm) of PS II were reduced by drought treatment, the reduction being greater in drought-sensitive genotypes. The drought-tolerant genotypes had greater osmotic adjustment (OA) capacity under water stress. Thus, the decrease of RWC and LWP was lower and the turgor pressure conservation capacity was higher under water stress in drought-tolerant genotypes. Drought-tolerant genotypes showed less decrease of photosynthesis because stomatal conductance, mesophyll conductance and the ratio (Fv/Fm) of the variable to maximal fluorescence of drought-resistant genotype was decreased less in the drought stress condition. In conclusion, the drought-tolerant genotypes had better water conservation capacity through efficient OA, and this led to the lower decrease of photosynthesis and growth in water stress condition.
Relationship between Drought-Tolerance and Physiological Parameters in Korean Barley Genotypes
KOREAN JOURNAL OF CROP SCIENCE, volume 48, issue 6, 2003, Pages 516~526
Thirty-six barley varieties including Korean modern and local varieties were tested for drought-tolerance in the field of plastic rain shelter, Drought treatment was initiated at initial tillering stage (March 27, 2002) by withholding irrigation and lasted until harvest. Soil water potential maintained at around -0.05㎫ in the control plot and varied from -0.05㎫ (at the initial stage of drought treatment) to -0.29㎫ in the drought treatment plot. At forty days after drought treatment, relative water content (RWC), osmotic potential (OP), osmotic adjustment (OA), and
) were measured and then plants were sampled for leaf area index (LAI) and dry weight (DW). Barley was harvested at maturity for determining DW, grain yield, 1000 grains weight and number of spikelet. The tested varieties revealed wide spectrum of drought tolerance. Dongbori-1, Chalbori, Changyeongjaerae, Samdobori and Weolseong 87-31 showed strong drought-tolerance while Songhagbori and Suwonmaeg360 showed weak drought-tolerance. The drought injury indexes (drought/control ratio) of DW and yield revealed significant positive correlation with leaf RWC in drought treatment plot and
in the control plot, but obvious negative correlation with leaf OP and OA under drought condition. In addition, all the drought indexes of OP,
and RWC showed obvious positive correlation with the drought injury indexes of DW, 1000 grain weight and yield. Thus, OP and RWC under drought condition and
under well-watered condition would be used as the evaluation criteria for drought- tolerance of barley genotypes. However, further investigation is needed for the relationship between
and drought-tolerance as the other reports were not consistent with our result.
Effect of Nitrogen Fertilization on Quality Characteristics of Rice Grain and Aroma-active Compounds of Cooked Rice
Je-Cheon Chae ;
KOREAN JOURNAL OF CROP SCIENCE, volume 48, issue 6, 2003, Pages 527~533
This experiment was conducted in 2001 to investigate the effect of four nitrogen levels (0, 5.5, 11, 16.5kg/10a) on the yield and quality of vice especially with respect to eating quality. One early-maturing variety (Daejinbyeo) and two mid-late-maturing varieties (Ilpumbyeo and Chucheongbyeo) were used in this experiment. Rice yields of all varieties were increased by the higher rate of nitrogen application, mainly due to a larger number of panicles per m2. Head rice ratio was reduced significantly with an increased rate of nitrogen, while immature vice ratio was increased significantly. Increasing the nitrogen application rate, a considerable increase of protein content was found in all tested rice varieties. Palatability value of Daejinbyeo and Ilpumbyeo measured by rice taster was not affected by nitrogen application rate ranging from 0 to 11 kg/10a, but it was decreased significantly at the rate of 16.5kg/10a. In contrast, the palatability value of Chucheongbyeo was decreased significantly by increasing nitrogen application at the whole application rate. A positive correlation was found between nitrogen application rate and protein content (r=
), but head rice (r=
) and palatability value (r=
) showed a negative correlation with the nitrogen application rate. Regardless of the fact that eleven aroma-active volatile compounds were detected in cooked vice of Chucheongbyeo, it was concluded that the aroma-active volatile compounds of cooked rice was not affected by the different nitrogen application rate. The results of this study showed that the standard nitrogen fertilization rate of 11kg/10a could be appropriate considering both rice yield and palatability.
Effect of Transplant and Harvest Time on Grain Quality of Rice in Reclaimed Paddy Field
Je-Cheon Chae ;
KOREAN JOURNAL OF CROP SCIENCE, volume 48, issue 6, 2003, Pages 534~539
The yield and quality characteristics of three rice varieties(Seojinbyeo, Ilpumbyeo, and Chuchungbyeo) in reclaimed saline paddy field were investigated under different cultural practices, three transplanting times (May 15, May 30 and June 15) and four harvest times (40, 50, 60 and 70days after heading) in order to obtain basic information for the production of high quality rice. Brown rice yield of three rice varieties were significantly higher in early and medium than late season cultivation. The protein content of milled rice showed high interaction effect between transplanting time and harvest time. Palatability values of Seojinbyeo and Ilpumbyeo were significantly higher in late than medium season cultivation, but Chucheongbyeo did not show any difference in its palatability value by different transplanting time. The palatability values of three rice variety was the highest in the harvest at 40 days after heading. The grain yield of three rice varieties were higher in early and medium than late season cultivation, whereas palatability values of three rice varieties were significantly higher in the early and late season cultivation than medium season cultivation. The palatability value measured by rice taster showed a highly negative correlation(r=
) with cumulative air temperature during ripening period.