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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 :
Lee, Sang Chul
Volume & Issues
Volume 24, Issue 4 - Dec 1979
Volume 24, Issue 3 - Oct 1979
Volume 24, Issue 2 - Jul 1979
Volume 24, Issue 1 - May 1979
Selecting the target year
Interpretation on the Epidemic Outbreak of Rice Blast Disease in Korea, 1978.
Eun-Woong Lee ; Sun-Zik Park ;
KOREAN JOURNAL OF CROP SCIENCE, volume 24, issue 1, 1979, Pages 1~10
In order to investigate the causes of epidemic out break of rice blast disease in 1978, investigations were undertaken in respect of climatic conditions, variety, cultural practice and plant pathology. During 1978, especially in August at heading time, it was higher temperature and humidity, higher frequency and amount of rainfall, lower amount of sunshine and solar radiation than less blast infested years. Nitrogen content in rice plant was higher than previous years. Acreage increase of semi-dwarf varieties brought about a result of proportional increase of new blast races which are able to infect the semi-dwarf varieties. It was concluded that those conditions mentioned above might have caused the result of severe neck blast disease in rice varieties in Korea, 1978.
Studies on the Chilling Injury of Rice seedlings. 1. Characterization of Chilling Injury & Recovery Different Leaf Stages
Yong-Woong Kwon ; Su-Bong Ahn ;
KOREAN JOURNAL OF CROP SCIENCE, volume 24, issue 1, 1979, Pages 11~24
To characterize elastic and plastic chilling injury, rice seedlings grown at 28/
day/night temp. under 20K lux (13hrs.) in a phytotron were subjected to a 11/
, 20K lux condition for 2, 4, 6 or 8 days at 1, 2, 3, 4 or 5th leaf-stage, respectively, followed by further growth under 28/
condition till 30th day after seeding. Japonica variety Jinheung and Chulwon No.1 survived almost 100% without any significant , discoloration and death of leaves due to chilling even under the chilling of 8 days at all seedling ages tested. Tongil and Yushin, varieties from Indica x Japonica cross, showed increasing discoloration of leaves and death of plants with increase in chilling intensity. The longest chilling duration shown seedling death less than 5% was 4, 6, 1, 4, 8 days for Tongil, and 6, 6, 1, 2, 2, days for Yushin at 1, 2, 3, 5th leaf-stage, respectively. The degree of discoloration and death of leaves or suppression of height growth was not explicitly related to seedling death or the dry weight reduction. The degree of seedling death or dry weight reduction could differentiate chilling tolerance of varieties and seedling ages, but somewhat differently. Reduction in dry weight due to chilling occurred even without any visible injury or seedling death. These suggest that both the degree of seedling death and reduction in dry weight should be considered in the test of varieties for chilling tolerance. Combined evaluation of seedling death and dry weight reduction indicated the most susceptible seedling age to chilling injury to be 1 to 2nd leaf-stage for Jinheung, 2 to 3rd leaf-stage for Chulwon No.1, 3rd leaf- stage for Tongil and Yushin, respectively.
Comparison of the Intra-hill Distribution of Culm and Panicle Length between Different Planting Numbers of Seedlings per Hill in Paddy Rice
Kwang-Ho Kim ; Eun-Woong Lee ;
KOREAN JOURNAL OF CROP SCIENCE, volume 24, issue 1, 1979, Pages 24~29
Intra-hill variances and coefficients of variance of culm and panicle length were increased while the avrage culm and panicle lenghts were decreased in the plot of the more planting numbers of seedlings per hill in paddy rice. The cumulative frequency of shorter culm than average lenght showed great differences between different planting numbers of seedling per hill. Verietal response of intra-hill culm and panicle length variation to different planting numbers of seedling per hill was not same and non-application of nitrogen fartilizer induced length under the more planting numbers of seedlings per hill.
Effect of Temperature at Flower Blooming Time on the Fertilization and Development of Embryo in the Cultivars of Tongil Line Rice
Man-Sang Lee ; Nou-Poung Park ; Toe-O Kwon ; Seok-Hong Park ;
KOREAN JOURNAL OF CROP SCIENCE, volume 24, issue 1, 1979, Pages 30~36
The fertilizations of cv Palkweng, Noupoung, and TN 1 which were crossed artificially at 2
were examined. The meiosis and the rate of maturity of the above 3 cultivars, Iri #326, Milyang #29, Suwon #264, and 3 others which were transplated at different times in paddy field were examined, and the results of which were as follows. 1. Palkweng at 3
was fertilized within 1.5~4.0 hours ,after pollination and at 20\circ C was done within 2.8~4.5 hours after pollination. 2. Noupoung and TNI at 3
were fertilized within 2.0~5.5 hours after pollination and at 2
were done within 3.0~6.0 hours after pollination. 3. The rates of fertilization of the cultivated rice plants at 2
were dropped in general. TN 1 at 2
was often fertilized abnormally. 4. In the development of embryo, Palkweng was the earliest at 3
and TN 1 was the earliest at 2
. 5. Although the time of transplant was late, the pollens of Palkweng was normal because the meiosis of that was normal. but the pollens of TNI was sterile in general because of the abnormal meiosis.
Quality Characteristics and Variation of Wheat Breeding Lines
Chang, H.G. ; Ryu, I.S. ; Cho, C.H. ; Bae, S.H. ;
KOREAN JOURNAL OF CROP SCIENCE, volume 24, issue 1, 1979, Pages 37~45
Experiments were conducted to determine the physicochemical properties for 1.382 tested wheat harvested in 1977. All the tested wheats had a milling yield rate of 49 to 71.5 percent. The cross combination involving S.son, Caprock and CI 12703 was generally the higher in flour yield-Flour protein content ranged from about 7 percent up to about 17 percent and sedimentation values ranged from below 20 cc to 70 cc. The cross combinations involving Bb #1 gave higher protein content and higher sedimentation values than the other combinations. The distribution of the Pelshenke value was from less 20 min. to more than 180 min. Specific sedimentation values of the 329 tested wheats showed 8.1 percent to be hard quality, while 54.4 percent were of soft quality. Intermediate wheats accounted for 37.5 percent. The lines having high milling yield rate, protein content and sedimentation value from the 329 tested wheats were Strampelli \times 69D-3607/Jogwang. S.son \times Caprock. Suweon #185 \times Toropi and Suweon #185 \times Ciano. The varieties or lines including Pribog, CI 14496 and Sturdy \times Scout/ Strampelli \times Bb-Cno showed high milling yield but low protein content and low sedimentation values. being under 9 percent and 30 cc respectively.
The Effect of Simulated Rainfall Treatment at Later Maturing Period on the Quality of Korean Wheat Varieties
Kang-Sae Lee ;
KOREAN JOURNAL OF CROP SCIENCE, volume 24, issue 1, 1979, Pages 46~56
Korean wheat varieties were tested to evaluate quality characters and the degree of deterioration due to simulated rainfall treatment. The result indicated that old varieties were generally superior in milling, flour color and dough properties to new varieties. And the quality properties of Korean new varieties were not exceeded those of Japanese varieties.
THE ACCUMULATION OF FREE PROLINE AT LOW TEMPERA TURES AND WATER STRESS IN BARLEY AND WHEAT
Won-Yul Choi ; Don Aspinall ;
KOREAN JOURNAL OF CROP SCIENCE, volume 24, issue 1, 1979, Pages 57~65
In order to find the physiology of responess In order to find the physiology of responses and mechanisms of the actumlation of free proline at low temperatures and water stress. the temperature range, the effect of prolonged exposure to low temperatures, the light-dependence of proline accumulation in barle was significantly lower than in wheat. Proline accumulation at 5\circ C without water stress was shown to be light-dependent. Proline accumulation by water stress was not light-dependent at 2
but at 5
Studies on the Wet-injury Resistance of Wheat and V. Interrelationship among the characters of Roots and Those of Tops in Barley and Wheat Crop
Hyung-Soo Suh ; Rae-Kyung Park ;
KOREAN JOURNAL OF CROP SCIENCE, volume 24, issue 1, 1979, Pages 66~72
interrelationship among the characters of the top and the root within a plant was investigated by deviding the roots of the plant into two parts and growing each one in two different environmental conditions, The roots grown on the poor environmental conditions such as over flooding moisture and overdried were less in numbers of root. shorter in root length. and lighter in root weight than those of good growing conditions, It was demonstrated that the roots grown under the poor environmental conditions affected not only the growing of the associated tillers but also the growing of all the tillers within a plant. In comparision with untreated plants. the culm length of treated plants was shortened. and the heading time of them was delayed. The most remarkable yield reduction was appeared at the over flooding moisture treatment. and the next was at the overdried treatment. The ten dency of yield reduction was more severe in sandy soil than that of clay loam.
Effect of Lodging on soybean yield and other important agronomic characters
Shin-Han Kwon ;
KOREAN JOURNAL OF CROP SCIENCE, volume 24, issue 1, 1979, Pages 73~77
An artificial lodging was made at various growth stages of the soybean varieties Clark and KAS 100-3-1 to evaluate its effect on seed yield and other important agronomic characters. Results showed general increases in plant height and number of branches per plant whereas reductions in seed weight. number of nodes, pods and seeds per plant in the severly lodged plots. As compared to prevention of lodging, about 40 percent yield reduction was caused by the severe lodging treatrment. Furthermore, the most severe lodging before blooming resulted in about 66% yield loss.
Genetic Studies on Leaf Shapes in Soybeans I. Means, Variances, Heritabilities and Correlations between Characters of Leaf Parts
Kwon-Yawl Chang ; suk-hyeon Kim ;
KOREAN JOURNAL OF CROP SCIENCE, volume 24, issue 1, 1979, Pages 78~83
Eight characters namely stalk length of trifoliate, stalk length of terminal leaflets, length of terminal leaflets, width of terminal leaflets, area of terminal leaflets, length of laternalleaflets, width of laternal leaflets, area of laternal leaflets in leaf parts of soybeans were measured to estimate the heritability values in percentage and relationships between those characters. Five parents and six different
generations and two backcross generations were used as the materials. The results obtained are summarized as follows: 1. Eight quantitative characters were differ from varieties. and hybrids from different cross combinations. 2. Heritability values of stalk length were showed the lowest, values of leaf length were lower than those of leaf width in both of main leaflets and laternal leaflets, and other values of leaf area in main and laternal leaflets were showed the highest values. 3. It was also recognized that there were close relationships between leaf length and leaf area, leaf width and leaf area in main leaflets and laternal leaflets, and area of main leaflets and laternal leaflets. There was, however, no any relationship between stalk length and other characters, and between length and width of main leaflets and laternal leaflets.
on the effects of phosphate and lime under difference soil fertility in soybean production
Keun-Yong Park ;
KOREAN JOURNAL OF CROP SCIENCE, volume 24, issue 1, 1979, Pages 84~91
This experiment was earned out with
P labeled phosphate and lime to determine the optimum amount of phosphate and lime fertilizers to soybean under various types of soil. The determination was made by the index of absorption of phosphate by soybean plants. The index of phosphate was 854 (mg/100g) in non matured soil. Due to the capability of neutralization of calcium the PH of the soil was raised to 6.5. The highest yield was obtained in matured soil at the index of phosphate absorption at 5% level. The degree of contribution of phosphate in. non matured soil showed slightly higher tendancy than that in matured soil.
III. Plant Characters of Korean Indigenous Corn Lines
In-Sup Lee ; Bong-Ho Chae ;
KOREAN JOURNAL OF CROP SCIENCE, volume 24, issue 1, 1979, Pages 92~98
Korean local corn lines from various regions in the country were studied for the plant characters such as flowering days. plant height. growth rate. number of ears per plant. leaf size. brace roots and tillers. All the lines without exception were different in plant characters studied and the difference were also apparent among regions from where the original lines were obtained. The variation among lines and original regions indicated that the plant characters were quite dependent upon the magnitude of traditional cultural practices and other environmental factors such as precipitation or cropping systems in regions concerned.
Effects of Plant Growth Regulators on Physiology of Germinating Punax ginseng Seed
Eung-Ryong Son ; Won-Mok Park ; C. Pertzsch ;
KOREAN JOURNAL OF CROP SCIENCE, volume 24, issue 1, 1979, Pages 99~106
The undehiscent ginseng seed did not germinate, even if the seeds were treated with GA_3, kinetin or IAA. Only GA_3 stimulated germination of dehiscent ginseng seed. The physiological roles of gibberellic acid on stimulation of the seed germination were enhancing production of soluble carbohydrate and sucrose. Then gibberellic acid stimulated biosynthesis of insoluble cellural materials and amino acids from sugars and incorporation of amino acids into protein. The fruit coat of ginseng seed did not impede water imbibition, but did function as water absorbor and reservoir.
Influence of Temperature and Soil moisture affecting the death to Vegetative organs of perennial weeds
Chang, Yung-Hee ; Kusanagi, Tokuichi ;
KOREAN JOURNAL OF CROP SCIENCE, volume 24, issue 1, 1979, Pages 107~118
The critical low temperature of death under submerged soil was -5^\circ C for the underground tuber of Cyperus serotinus while the vegetative organ (tuber or bulb) of Sagittaria pygmaea and Potamogeton distinctus -6^\circ C, -7^\circ C respectively. On the critical high temperature of death in water bath with 45^\circ C. Potamogeton distinctus and Sagittaria pygmaea were 1 hour, 24 hours, but Cyperus serotinus did not die. When vegetative organs of perenivial weeds setted on the soil surface, the propagation organ of Potamegeton distinctus did not die by desication in 17% of soil moisture, but Cyperus serotinus and Sagittaria pygmaea were dead within 2 to 3 hours in 25^\circ C of soil moisture.