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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Korean Journal of Crop Science
Journal Basic Information
Journal DOI :
The Korean Society of Crop Science
Editor in Chief :
Volume & Issues
Volume 32, Issue 4 - Dec 1987
Volume 32, Issue 3 - Sep 1987
Volume 32, Issue 2 - Jun 1987
Volume 32, Issue 1 - Mar 1987
Selecting the target year
Variations of Yields and Growth-related Characteristics shown by Different Ecotype of Rice Varieties in the Temperate and Tropical Zones IV. Varietal Variation in Different Sowing Times and Nursery Period in Temperate Zone
;Eun-Woong Lee;Yong-Woong Kwon;
Korean Journal of Crop Science, volume 32, issue 2, 1987, Pages 121~129
Indonesian varieties were compared with Korean varieties on three different sowing times, each of which had three different nursery periods, at Suwon, Korea (126
19'E and 37
16'S). Indica-type varieties with exception of late-maturing ones had heading regardless of sowing time and nursery period. As the Korean varieties com-pared with those, the earlier sowing plots with shorter period of nursery gave better result in yields and yield components.
Studies on the Prevention of Excessive Drying Leaves during Burley Tobacco Curing III. Effect of the Ventilating Conditions on the Occurrence of Excessive Curing Leaves
Korean Journal of Crop Science, volume 32, issue 2, 1987, Pages 130~136
The studies were carried out to investigate the occurrence of excessive dried leaves during burley tobacco curing. Six different periods of ventilation during the entire stage of curing were applied. And also 3 different heights of rolling up polyethlene film for side ventilation of the curing house combined with 4 different spaces between garlands were applied from after yellowing. The high air temperature and low relative humidity from end of yellowing to end of browning stage were the most critical to occur excessive dried \eaves. As side ventilation was continued for the entire stage of curing, air temperature in curing house was lower and occurrence of excessive dried leaves were remarkably decreased. The air temperature was not affected on hanging spaces, but relative humidity that resulted significantly in decreasing of the excessive dried leaves was increased by narrowing of hanging spaces. As excessive dried leaves were increased, its price per kg was lower, its physical properties was worse and its total nitrogen and total suger were higher than those of normal cured leaves.
Quality of Sweet Corn Stored at Different Temperatures and Duration
Korean Journal of Crop Science, volume 32, issue 2, 1987, Pages 137~143
To find out the optimum storage temperature and duration, changes in the content of sugars and soluble solids and flavor rate of two sweet corn hybrids (Great Bell and Golden Cross Bantam) and a super sweet corn (Crisp Super Sweet 720) were observed after storing at -20, 0, 5, 10, 15, 20, and 25
for 1,3,5, and 7 days. At the temperatures below 10
, contents of soluble solids and total sugars and flavor rate were not changed significantly, but at the temperatures higher than 15
they decreased as storage temperatures increased and duration extended. Storage duration conserving flavor seems to be 7 days at temperatures below 10
, 3 days at 15
, and 1-2 days at 25
. When corn was frozen, flavor rate was a little low compared with corn stored at 0
although sugar content was higher. Both soluble solids and total sugar contents were positively correlated with flavor rate of cooked corn.
Intercropping with Soybean and Cowpea for Increasing Feed Value of Corn Stover
Korean Journal of Crop Science, volume 32, issue 2, 1987, Pages 144~150
To increase the feed value of corn stover after grain harvesting, these studies were conducted to evaluate the methods and effects of intercropping with corn and legume crops, soybean and cowpea. Basic studies were designed to detect the light receiving efficiency of intercrops with change of row-space and interrowspace under plant density of the level of 5,555 plants/l0a. Another study was conducted to select the favorable varieties for intercropping. The plant space of 90 x 20 cm was more effective to increase the light receiving effeciency of intercrop without decrease the yield of corn than that of 60 x 30 cm. Among several corn hybrid/varieties, erect leaf type was desirable for intercropping with high light penetration. Silage yield of intercropping with corn and legume crops increased above 20% without decrease of grain yield of corn compared with monocropping. The silage of intercropping appeared as a good quality roughage bulky feed with high content of crude protein and fat.
Studies on Breeding of Hybrid Rice Using the Korean Cytoplasmic and Genetic Male Sterile Rice III. Yield and Grain Quality of the
Rice Hybrids Developed by Using the Genetic Male Sterile Lines Having the Backgrounds of Korean Variety
Hak-Soo SUH ;
Korean Journal of Crop Science, volume 32, issue 2, 1987, Pages 151~156
rice hybrids were developed by using the genetic male sterile lines having the backgrounds of Korean variety. The average heterosis, heterobeltiosis and standard heterosis for grain yield were 15.2%, 8.7% and 17.9%, respectively. Significant heterobe1tiosis for number of grains per panicle was observed. The leaf blast reaction of the hybrids was mostly similar to that of the more resistant parent. Amylose content of the hybrids ranged from 20.5% to 22.5% and protein content from 10.4% to 11.1%. The degrees of alkali digestion value, white center or white belly, clearance and heading date of the hybrids were almost same as their parents.
Comparison of Photosynthetic Rates among Panax Species and Cultivars
Korean Journal of Crop Science, volume 32, issue 2, 1987, Pages 157~162
The study was carried out to investigate the effects of light intensity, temperature and seasonal trends on the photosynthesis as well as the physiological characteristics of Panax species and cultivars. Four-year-old plant of Violet-stem variant, Yellow-berry variant, Mimaki and Russian ginseng of Panax ginseng C. A. Meyer and American ginseng of Panax quiquefolium L. were used for study. These Panax species and cultivars were cultivated under the straw shading. The light saturation point of leaves in Violet-stem variant, Yellow-berry variant, Mimaki and American ginseng were 15,000 lux, but that of Russian ginseng was 10,000 lux. The optimum air temperature on the phtosynthesis of Violet-stem variant, Yellow-berry variant, Mimaki and American ginseng were 20
but that of Russian ginseng was 15
under 15,000 lux. The photosynthetic rates were increased in order of Russian ginseng, Mimaki, Yellow-berry variant, Violet-stem variant and American ginseng. The respiration rates of ginseng leaves were increased according to the increasing of temperature, but it was not different among Panax species and cultivars. Stomata frequency of American ginseng was highest, that of Russian ginseng lowest, while the length of stomata was reverse. The total chlorophyll content of American ginseng and specific leaf weight of Mimaki were higher than other ginseng cultivars. The root weight of American ginseng was heavier than others, but that of Russian ginseng was lighter. The num ber of leaflets per plant of 2-year-old plant and the root weight of 6-year-old plant were increased in order of Russian ginseng, American ginseng, Mimaki, Yellow-berry variant and Violet-stem variant.
Studies on the Reducing Methods of Cold Wind Damage of Rice Plant by Installation of Windbreak Net in the Eastern Coastal Area
Korean Journal of Crop Science, volume 32, issue 2, 1987, Pages 163~172
Results obtained from this study conducted to find the effect of wind-break net on reducing cold wind damage in the eastern coastal cold wind damaged area are summarized as follows. The rice critical safe heading date was up to Aug. 10 in the eastern coastal area, which the frequency of gale Aug. 10 to Sep. 10 is high. The frequencies of westries and cold wind from sea were 25%, respectively, in this area. The effects of wind-break net on reducing wind verocity were 26.9, 34,6% with raising air temperature of 0.4-0.7
and water temperature of 0.3-0.5
. The effect of wind-break net was up to 10 time's distance of wind-break net's height from wind-break net. The installation of wind-break inhanced to rice growth, so showed the heading date earlier by 2-5days and increased culm length, no.of panicles per hill and no. of spiklets per panicle. The yield decrease in this area was due to sterilization, poor ripening and light 1,000 grain weight. The yields showed 20-28% increase by installation of wind-break net. The effect of wind-break net was most in the installation plot with wind-break net against cold wind from sea and westries installed in the panicle formation stage.
An Evaluation Method for Sesame (Sesamum indicum L.) Resistance to Phytophthora nicotianae var. parasitica
Seong Ho, Choi ; Eui Kyoo, Cho ; Young Am, Chae ;
Korean Journal of Crop Science, volume 32, issue 2, 1987, Pages 173~180
Symptom development and disease severity of Phytophthora blight in the sesame plants varied depending upon age of the plants tested, inoculation method, watering method, and inoculum density in both susceptible Suweon 9 and Suweon 26 and moderately resistant B-67 and IS 103 sesame lines to Phytophthora nicotianae var. parasitica when inoculated. However, successful differentiation of the sesame lines for varietal resistance was possible using 20-day old seedling, inoculation by soil infestation, saturated soil water condition by half immersion of pots in water tank, and 200 sporangia per one ml of inoculum. Spraying or soil inoculation to 70-day old plants also was effective in differentiating the varietal resistance. By the screening method Suwon 26 showed 100％ diseased plants and symptom severity index 9.0, while B-67 showed 20% diseased plants and symptom severity index 1.7. The rating scale given was from 0 through 9. For example, the scale 0 signified no symptom development, 5 signified discoloration of basal part of stem, and 9 signified discoloration of stem more than 10 cm high above the soil surface with blighted leaves. Differentiation in symptom severity also was made by percentage of the lesion area. Results evaluated using both parameters were well corresponded in varietal reaction of sesame to Phytophthora blight.
Effects of PP333 Spraying on Growth of Soybean
Korean Journal of Crop Science, volume 32, issue 2, 1987, Pages 181~187
The objectives of the study were to reduce lodging during the stormy rain period of soybean growing season in Korea, and to find out the most efficient foliar spraying of pp 333 solution in order to increase tolerance to lodging of soybean plants. The concentration of the pp 333 solution were three, five and eight percent and the time of spraying were 35th day after seeding and at flowering time. The most efficient foliar spraying practice was to spray five percent solution of pp 333 on the 35th day after seeding, resulting in reduced stem length damage of soybeans alone with shortened plant height and stabilized yield of soybean grains.
Growth of Seedling from Immature Kernel Harvested at Different Days after Flowering in Rye, Triticale, Wheat and Oat Cultivars
Korean Journal of Crop Science, volume 32, issue 2, 1987, Pages 188~195
This study was conducted to investigate whether seedling growth be affected by immature kernels from different stages after flowering in rye, triticale, wheat and oats cultivars, for two years in Suwon. Kernels reached a near-maximum test weight at 35 days after flowering in Paldanghomil and Dooroohomil (Rye), and 30 days in Sinkihomil (Triticale), Geurumil (Wheat), and Megwiri (Oats). Test weight of immature kernels from different days after flowering were not significantly correlated with germination percentage, but highly positively correlated with their seedling height, fresh and dry weight. However, seedling height is not different among seedlings from kernels harvested at 20, 25 and 30 days (maturing time) after flowering of Sinkihomil and Megwiri, and between 25 and 30 days (maturing time) of Geurumil. Also between seedlings from 25 day and 30 day-kernel after flowering are little difference of fresh and dry weight of Sinkihomil and Megwiri. In Suwon, located at the middle part of Korea, it was suggested that Paldanghomi1 and Dooroohomil could be harvested at 35 days (June 19, and June 24, respectively) after flowering, and Sinkihomil, Geurumil, and Megwiri, at 25days (June 24, June 14 and July 4, respectively) after flowering for seed of for2:ge production.
유채박의 사료화를 위한 유해성분(Glucosinolate) 개량육종에 관한 연구 IV. 5-vinyl-2-oxazolidinethione 함량의 유전
Jung-Il Lee ;
Korean Journal of Crop Science, volume 32, issue 2, 1987, Pages 196~200
Studies on the Combining Ability for Silage Yield and Major Agronomic Characters of Corn
Korean Journal of Crop Science, volume 32, issue 2, 1987, Pages 201~207
This experiment was conducted to identify the superior corn hybrids for silage production and to determine the combining ability of their parental inbred lines. A 7-entry diallel cross was evaluated for grain and stover yields, and agronomic characters under 3 different seasons. Hybrids Hi34 x Tx601, Hi26 x Hi34, and Hi29 x Hi34 showed high total dry matter yields. In general, late maturing hybrids had higher grain and silage yields than early maturing hybrids. Leaf area index was correlated with grain and stover yields. Rust rating was negatively correlated with yields and all characters, indicating that rust (Puccinia sorghi) was one of the major factors affecting yields. Diallel analysis showed that inbred Hi34 which was late in maturity and resistant to rust was the best combiner for both grain and silage yields. General combining ability (GCA) and specific com-bining ability (SCA) effects for yields and other characters were significant, suggesting that both additive and non-additive gene effects are involved for those characters. Ratio of GCA/SCA mean squares showed that GCA effects were more important than SCA effects for yields and other characters. GCA x season and SCA x season interactions were significant for grain and stover yields, revealing that gene effects were not stable for those yields under dissimilar environments.
Genetic Analysis of Six Panicle Characters in Rice
Korean Journal of Crop Science, volume 32, issue 2, 1987, Pages 208~214
A genetic study on the panicle characters in Oryza sativa was carried out by means of a 5 x 5 diallel cross. The five parental varieties were Raekyung, Yeongnamjosaeng, Nongbaek, Yushin and Honenwase. All characters were correlated positively each other, except number of kernels per primary branch. The number of secondary branches per primary branch.was the most effective factor in determining the number of kernels per panicle, the next being the number of primary branches per panicle. Regression analyses of the data of Vr/Wr indicated the presence of non-allelic gene interactions for all characters. Overdominant characters were the number of kernels per panicle, the number of primary branches per panicle, the number of secondary branches per primary branch, the number of kernels per primary branch and sum of kernels on all the tertiary branches per panicle, suggesting that the characters were more influenced by dominant effect than additive effect. However, the number of kernels per secondary branch was partially dominant where the genetic variation was due more to additive effect than to dominance effect. But after omitting the parent which had non-allelic interaction gene, the characters; the number of kernels per panicle, the number of secondary branches per primary branch, and the number of kernels per secondary branch, were partially dominant. Narrow sense heritabilities(h
N) in number of kernels per panicle and number of secondary branches were high and moderate, respectively, but those of the rest were lower. Mean squares of GCA and SCA of all characters, except SCA of the number of kernels per secondary branch, were highly significant. Effects of GCA were larger than SCA effects in all characters. Raekyung, Yushin and Nongbaek had highly positive GCA, and the best positive SCA was observed in crosses of Nongbaek x Tongillines (Raekyung, Yushin, and Yeongnamjosaeng) in all characters.
Effect of Nitrogen level under low Temperature Condition on Growth Characters, Nitrogen Concentration and Ethylene Evolution of Rice Varieties
Moon-Hee Lee ; ; Jong-Hoon Lee ;
Korean Journal of Crop Science, volume 32, issue 2, 1987, Pages 215~223
This experiment was carried out to determine the effect of nitrogen application on the cold tolerance of rice plant, with treatment of three levels of nitrogen and three times of application under the low temperature at tillering and panicle initiation stages. The higher cold tolerance variety was increased in plant height and number of tillers on high nitrogen level during the low temperature treatment. Nitrogen content of leaf blade was increased, but carbohydrate content was decreased during the low temperature treatment at tillering stage. Ethylene evolution from leaf was remark-ably increased just after low temperature treatment. Highly significant negative correlation was observed bet-ween the nitrogen content of leaf blade and percentage of filled grain under low temperature condition at reproductive growth stage.
Lodging Liability and Response to Paclobutrazol Application of High Eating Quality Japonica Rice Varieties
Eun-Woong Lee ; Yong-Woong Kwon ;
Korean Journal of Crop Science, volume 32, issue 2, 1987, Pages 224~233
Most of the japonica rice varieties preferred for high eating quality are liable to lodging even under moderate rate of nitrogen application. This lodging liability has been a critical limit even for proper evaluation of physio-logical characteristics of those varieties exhibitable under higher nitrogen levels. Use of recent inhibitors of gibberellin biosynthesis such as ‘Pac1obutrazol’ may allow us to overcome this barrier. The responses of four high eating quality varieties to nitrogen application to the level of 150kg N per ha were evaluated with and without use of Paclobutrazol in comparison with a non-lodging, improved short japonica, Dongjin and a non-lodging, high yielding indica x japonica Milyang 23. The four were Damageum (the best eating quality in the 1930s), Nongrim 6 (the best in the 1960s), Chuchung (the best since 1970s), Koshihikari (the best in Japan since 1960s). As expected increased application of nitrogen increased plant height, length of the 3rd internode, and lodg-ing liability, being measured as culm breaking load, in all varieties tested and caused actual lodging in the fiel from the 50kg Nfha level in Damageum and Koshihikari and at the level of l50kg Nfha in Nongrim 6. Applica-tion of Pac1obutrazol (0.6%G) 15 days before heading reduced plant height, length of the 3rd internode and lodging liability being measured as culm breaking load in all varieties tested. However, the application of Pac1obutrazol during active tillering stage resulted in decreased culm breaking load in Damageum, Nongrim 6, and Koshihikari in spite of the decreased plant height and culm length as in the other varieties. Maximum yield was obtained with 100kg Nand 30kg Pac1obutrazol at 15 days before heading in Nongrim 6, 150kg N and 30kg Pac1obutrazol at 15 days before heading in Damageum, and 150kg N and 20kg Paclobutrazol at 20 days after transplanting plus 30kg Paclobutrazol at 15 days before heading in the variety Koshinhikari and Chuchung. Under a sensory evaluation of cooked rice, the four high eating quality varieties were not different in rank and Paclobutrazol treated rice was not distinguished from the untreated in eating quality.
Study on the Physico-chemical Properties of Rice Grains Harvested from Different Regions
Kwang-Ho Kim ;
Korean Journal of Crop Science, volume 32, issue 2, 1987, Pages 234~242
Rough rice samples of four rice varieties were collected from twenty five locations through the country just after 1986 rice growing season. Various characteristics related to rice grain quality were observed to clarify the degree of locational variation of physico-chemical properties, and cooking and eating quality of rice grains. Grain weight, grain shape, degree of translucency and chalkiness of rice grain, amylogram properties of rice flour, water uptake during cooking, and cooked rice appearance were different between varieties tested. High degree of locational variation were found in following characteristics, degree of translucency and chalkiness of rice grain, water uptake during cooking, cooked rice appearance and amylogram properties. Eating quality of cooked rice indicated by sensory score showed different tendency of locational variation between rice varie-ties tested, and locations produced rice grains showing better eating quality were not coinside with among varieties tested. Grain weight, degree of translucency and chalkiness of rice grain, and cooked rice appearance of rice samples showing better eating quality were quite different to rice grains showing poor eating quality. Rice having better eating quality of a japonica variety, Chucheong, showed higher value of peak and final viscosity, viscosity after cooling, consistency and set back on amylograph compared with those of poor eating quality rices, and break down value of better rice was lower than that of poor rice. However, a Tongil type variety, Taebaek, did not show any consistent difference between better and poor rices. Rice samples from six locations in Chucheong and four locations in Taebaek showed special properties on amylogram compared with other rices collected in this study.