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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 21, Issue 2 - Dec 1976
Volume 21, Issue 1 - Jun 1976
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The Effect of the Photosynthetic Ability and the Nutritional Status on Dry matter Production and Yield Components of the Rice Plant at the Latter Half of the Growth Stage
Joo-Yul Lee ;
Korean Journal of Crop Science, volume 21, issue 2, 1976, Pages 187~202
Experiment were conducted to study the photosynthetic ability of several rice varieties and the influence of the drymatter production on the yield components of the rice plant, especially in ripening period. The photosynthetic ability at the ripening period, the varieties were classified into two groups as relatively high capacity and low capacity. With the earlier the transplanting date and the higher the N-content leaf blade, the greater the ratio of reserved assimilates befere heading time to the ear. This could be support the fact that the rate of full-ripened grains or grain yield of 'Tongil' variety may increased by the change of environment condition.condition.
Studies on Low Temperature Injury at each Growth Stage in Rice Plant
Hyun-Ok Choi ; Jong-Hoon Lee ;
Korean Journal of Crop Science, volume 21, issue 2, 1976, Pages 203~210
To abtain basic information in process developing cold tolerance rice variety, used 8 varieties which are the close crossing and the remote crossing in order to clarify how is being the differences of low temperature injury in same variety and the varietal difference at each growth stage under the low temperature treatment, 18
(day-night), and to establish the effective testing method for low temperature injury in rice plant. In this experiment, the varietal ifferences of low temperature injury were significant in rice plant, and found out that low temperature injury at the each growth stage from sowing to heading in same variety was not horizontal.
Effect of Light and Long-day Interruption during Short-day Period on Heading of Rice Plant
Mun-Hue Heu ; Kwang-Ho Kim ;
Korean Journal of Crop Science, volume 21, issue 2, 1976, Pages 211~217
Experiments were conducted to test the effect of light and long-day interruption on the elimination of short-day effect. The effects of both the short-day treatments and the light interruption treatments were cumulative.
Effect of Cuttings on Forage and Grain Yield of Barley
Korean Journal of Crop Science, volume 21, issue 2, 1976, Pages 218~221
Two varieties of winter barley was grown in the field and young plants were clipped at different stage of development in the spring. It was observed that young plant cutting for forage was beneficial for both forage and grain production of barley.
Studeis on the Effect of Ethylene-Releasing Agents in Increasing Grain Yield of Barley With Higher Nitrogen Application
Beyoung-Hwa Kwack ; Yu-Ki Hong ;
Korean Journal of Crop Science, volume 21, issue 2, 1976, Pages 222~232
Two different cultivars of barley, with either the ordinary-level or double-strength nitrogen application, were grown in two districts simultaneously, in order to study the extent of dwarfing in plant height, lodging and grain-yield increase with ethylene-releasing agents (Ethrel and dl-methionine alone or in combination). The shorter the plant height, the less the extent of lodging and the grain yield there were. With 500ppm Ethrel, 10% grain-yield increase was attained without showing apparent lodging, irrespective of the level of nitrogen applied. The double-strength nitrogen application resulted in severe lodging more than the ordinary-level and control, and lower grain yield accordingly. Consideration for importance of barley lodging in Korea today and the controlling measure with ethylene treatment for dwarfing, and yield increase by increased nitrogen application, were discussed.
Variation of Yield and Yield. Components of Wheat and Barley Cultivars in Accordance with Different Seeding Rate and Fertilizer Level
Jung-Hyun Choi ; Jae-Young Cho ;
Korean Journal of Crop Science, volume 21, issue 2, 1976, Pages 233~249
This experiment was conducted in an attempt to find the variation of growth, yield components and .yield in accordance with different seeding rate and fertilizer level. The degree of yield increase by increased fertilizer level was higher in heavy spike type .than in high tiller type. but that by increased seeding rate was the reverse in barley and wheat. 1, 000 .grains weight and maturity was increased by increased fertilizer level in heavy spike type (Haganemugi and Young Kwang) but decreased in high tiller type (Suweon ＃165 and Yuk Seung＃3).
Effect of Defoliation on the Grain Yield of Two Soybean Cultivars Grown under Different Population Densities
Hong-Suk Lee ;
Korean Journal of Crop Science, volume 21, issue 2, 1976, Pages 250~257
Defoliation effect of two soybean cultivars on the grain yield was studied under different planting densities planted at two different planting date. Leaf removal caused a linear decrease of grain yield with increased amounts of defoliation in the case of lower population densities, while in the case of higher population densities over 40 plants per sqare meter, the slight removal of lower leaves indicated increased grain yields by 13% to 35% compared with control depending on the cultivar and planting time. The pod number per plant was the most effective factor influencing grain yield. The grain weight and the percent of matured grain become more important components for higher yield with decreased population densities depending on cultivar.
Studies on the Ecology and Control of Bog Pondweed(Potamogeton distinctus A. BENN) in Paddy Field
Korean Journal of Crop Science, volume 21, issue 2, 1976, Pages 258~268
This study was conducted in order to know the ecology and to establish the control method of Potamogeton distinctus A. BENN. The tubers of Bog pond weed was almostly located at soil depth of 10 cm to 20cm, germination rates and number of formed tubers were different according to transplanting depth of soil. Effects of herbicides application on weeds were different according to leaf-stage of pondweed, and the pondweed were withered to death by absorption of Avirosan into the leaves. It was suitable to keep water depth at 3cm level until about a week after Avirosan application.
The Effects of Nitrogen Application Methods on the Nitrogen Efficiency and Weed Population under the Lowland Rice
Moon-Hee Lee ; S.K. De.Datta ;
Korean Journal of Crop Science, volume 21, issue 2, 1976, Pages 269~276
This experiment was conducted to find out how to increase efficiency of fertilizer nitrogen and how to change the weed population with different methods of nitrogen application. Mudball deep placement, at 10-12cm soil depth, produced significantly the highest grain yield within the application methods with same amount of nitrogen (60kg N/ha). It produced also same grain yield with conventional application methods, timely split application method, with 90kg N/ha. Basal application of nitrogen increased weed population and it showed higher dry weight of weed than top dressing methods at early growth stage of rice.
Studies on the Nodulation ana its Effects on the Growth of Several Pulse Crops in the Volcanic Soil
Yang-Mun Park ;
Korean Journal of Crop Science, volume 21, issue 2, 1976, Pages 277~280
In order to obtain the fundamental informations on the nodulation and its effect on growth of pulse crops in volcanic soil, 6 legume crops were planted in the newly reclaimed land of Cheju-do. The attached nodule weight was in the order of senna, pea, soybean (hill), white clover and kidney beans.
Studies on the Inheritance of Agronomic Characteristics in Upland Cotton Varieties (Gossypium hirsutum L.) in Korea
Bang-Myung Kae ;
Korean Journal of Crop Science, volume 21, issue 2, 1976, Pages 281~313
To obtain fundamental informations on cotton breeding efficiences for Korea, individual genetic relationships and interrelationships between the agronomic characteristics of Upland cotton were investigated. These experiments were couducted at the Mokpo Branch Station
and altitude of 10m above sea level) from 1969 through 1972. Heterosis, combining ability, dominance and recessive gene action, genetic variance, and phenotypic and genotypic correlation were investigated by
from an 11-parent partial diallel cross and the segregating
populations of the cross Paymaster times Heujueusseo Trice. The following points resulted from this study, 1. Heteroses for number of bolls per plant and lint yield were significant at 27, 84% and 37.26%, respectively. No other character had significant heteroses. 2. The GCA estimates for all studied characteristics were higher than the SCA estimates. Varieties with high GCA effects were Suwon 1 for earliness, Paymaster and Arijona for high lint percent, and Arijona for long fiber, etc, 3. SCA estimates for lint yield varied widely in crosses with Mokpo 4, Mokpo 6 and Heujueusseo Trice. Those crosses with the highest SCA effects were combinations with large characteristics differences, Example of these crosses are Mokpo 4 times Acala 1517W, Mokpo 4 times D. P. L. and Heujueusseo Trice aud Paymaster. 4. Early-maturing varieties were completely dominant to late-maturing varieties in some combinations while other crosses gave intermediate phenotypes. These results suggest additive genetic action by multi-genes. Heujueusseo Trice, Mokpo 6, and Suwon 1 showed highest degree of dominance for earliness. 5. There were no significant trends for inheritance of weight of boll and 100 seeds weight. 6. Long staple was partially to completely dominant to short staple. Though there were single gene ratios the rate of dominance decreased in the
populations in the cross between the long staple variety Paymaster and the short staple variety Heujueusseo Trice. Diallel cross
hybrids showed complicated allelic gene action for staple length. Various dominance degree were shown by varieties. 7. Number of bolls per plant indicated strong over-dominance and small non-allelic additive gene action. 8. Lint Yield was characterized by over-dominance and by multiple non-allelic-gene action. High-yielding varieties were dominant to low-yielding ones. However, the low-yielding variety Heujueusseo Trice showed over-dominance, indicating different reactions according to the varieties and combinations. 9. Broad sense heritability for days to flowering was 34-39% while narrow sense heritability was 11%. Large variations of individual plants caused by Korean climatic conditions cause this situation. Heritability estimates for weight of boll was 30% for broad sense and 22% for narrow sense. 10. Heritability estimates for staple length and lint percent were very high suggesting strong selection effects. 11. Narrow sense heritability estimates for number of bolls per plant was 30% in the diallel cross
hybrids and 36% in the
population of the special cross. Broad sense heritability was estimated at 67% suggesting that. 12. Heritability estimates for lint yield was low due to high over-dominance in the diallel cross
hybrids. Heritability estimates for yield was low in the
hybrids but high in the
populations. 13. Phenotypic and genotypic correlations between lint percent and days to flowering and between staple length and days to flowering were high in the
populations. Late-maturing varieties and individuals had long staple and high lint percent in general. As the correlation between days to flowering and lint yield was extremely low, the two traits were considered independent of each other. Days to flowering and number of bolls per plant were negatively correlated in the
population, indicating early-maturing individual plants with many bolls may be readily selected. 14. Phenotypic and genotypic correlations between lint percent and staple length were high in
populations. Accordingly, long staple varieties were high in lint percent. It was recognized that lint yield and lint percent were positively correlated in the diallel cross
hybrids, and lint percent and staple length were positively correlated in the
population, indicating that lint percent and staple length affect lint yield. 15. Lint yield was significantly and positively phenotypically correlated with number of bolls per plant in
populations. A high genotypic correlation was also noted indicating a close genetic relationship. The selection efficiencies for a high-yielding variety can be increased when individual plants with many bolls are selected in later generations. The selection efficiencies for good fiber quality can be enhanced when individuals with long staple and high lint percent are selected in early generations.