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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 33, Issue s01 - Dec 1988
Volume 33, Issue 4 - Dec 1988
Volume 33, Issue 3 - Sep 1988
Volume 33, Issue 2 - Jun 1988
Volume 33, Issue 1 - Mar 1988
Selecting the target year
Variation of Yield and Major Agronomic Characters under the Different Planting Densities of Sculellaria baicalensis
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 1, 1988, Pages 1~4
This study was invesigated to find out the optimum planting densities of Sculellaria baicalensis GEORGE about growth characters, yield components and yield at 6 planting densities by direct sowing culture. The results obtained are summarized as follows ; Studying the correlationship, the highly negative significances were found between planting densities and dry wights of root, leaves and stem ; on the other hand, the highly positive significances were found between planting densities and plant hight, stem diameter, respeitively. Plant height was long in dense planting, and short in spacious planting by direct sowing culture. Stem diameter was thick in spacious planting, and was thin in dense planting. Length and dry weight of root per plant were decreased in dense planting and were increased in spacious planting by direct sowing culture. Quality and yield of dry root weight were highest in optimum planting densities (30
10cm ; 33plants/m
) by direct sowing culture.
Studies on the Duration and Rate of Grain Filling in Rice (Oryza sativa L.) II. Difference between the Parts of a Panicle
Dong-Sam Cho ;
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 1, 1988, Pages 5~11
Varietal differences of grain filling duration and rate are generally recognized in rice (Oryza sativa L.). But the differences of grain filling characteristics between the parts within a panicle might be present since it takes 6-8 days to finish anthesis in a panicle. To elucidate this, 6 Japonica and 6 Japonica/Indica varieties were grown under three nitrogen levels at the Experimental Farm of Chungbuk National University in 1986, and grain filling characteristics of top, middle and bottom parts of a panicle were analyzed. Rice grain filling duration could be divided into 3 phases, i.e., Lag phase(LP) of 5 days after heading. Linear increasing period (LIP) of 5-20 days after heading and Late filling period (LFP) thereafter. Grain weight difference between the panicle parts was greater during LIP in all the varieties and was decreased during LFP. The difference was greater in Japonica/Indica varieties. Samgangbyeo and Seomjinbyeo had the shortest and the longest grain filling durations with 22.6 and 37.1 days, respectively. In average, grain filling duration of the bottom part of a panicle was 1-2 days shorter than that of top or middle part. The differences were negligible in Daecheongbyeo, Taebaegbyeo and Milyang 23, while it was greater in Tongil with 4.9 days. Grain filling rates were ranged from 0.612 to 1.097 mgㆍgrain
ㆍMilyang 23 showed the lowest rate with 0.612-0.682 mgㆍgrain
, while the rates of Baegyangbyeo, Yongmoonbyeo, Samgangbyeo, Nongbaeg and Daeseongbyeo were about 1 mgㆍgrain
ㆍGrain filling rate of bottom part of a panicle was lower than that of top or middle part. The difference was samll in Nongbaeg and Daeseongbyeo, while it was the greatest in Tongil with 0.222 mgㆍgrain
. Grain filling duration and rate were not afftected by nitrogen level, but varietal and spatial differences of grain filling characteristics were highly significant. However, the spatial difference of grain filling rates within a variety was not significant. Grain filling characteristics of each part of a panicle were significantly correlated (r=0.7207-0.9879) with those of a whole panicle.
Effect of Soil Acidity and Nitrogen Fertilization on the Growth and Yield of Barley Cultivars
Jai-Wook Shim ;
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 1, 1988, Pages 12~22
The effects of pH and Aluminum treatment on the seedling growth were examined with 11 cultivar under three levels of pH in nutri-culture.. Growth and yield responses of soil pH and nitrogen fertilization were also studied with five cultivars under 3 levels of soil pH and 3 levels of nitrogen application in the field experiment. The effect of pH on the seedling growth was not significant, but Aluminum treatment significantly decreased the seedling growth in nutri-culture except Dusan ＃12. Chlorophyll contents of leaves, dry weight of plants, culm length, spike numbers per unit area, grain numbers per spike, grain weight, and yield were decreased as the decrease of soil pH, and thus highly significant correlation between soil pH during barley growth and yield was observed in all cultivars examined. The stable cultivars to different soil pH with high yield was not found although the decreases of yield were different with cultivars. The increase of nitrogen fertilization significantly increased the nitrogen and chlorophyll contents of leaves, and dry weight of plants, while showed a little effects on the culm length, spike number per unit area, grain number per spike, grain weight and yield. The yield was significantly correlated with culm length, dry weight of plants, grain numbers per spike and 1000 grain weight at each pH levels.
Effect of Topping Method on the Quality Components of Flue-cured Tobacco
Yu-Sun Ban ;
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 1, 1988, Pages 23~30
This experiment was carried out to obtain the basic information for the improving of leaf quality by topping time and depth in flue-cured tobacco. Development of palisade parenchyma and spongy parenchyma were in order of button stage＆gt;early flower stage＆gt;late flower stage by topping time, and were in order of 4th leaf topping from floral axis＆gt;2nd leaf topping from floral axis＆gt;floral axis by topping depth. When 2nd leaf from floral axis were topped at late flower stage in A grade field and at early flower stage in B grade field, total sugar to nicotine ratio ralating to organoleptic characteristics were desirable as 9.0 and 9.7, and petroleum ether extract contents relating flavor of flue-cured tobacco were high as 9.9% and 8.4%, respectively. In ecological tissue, percentage of direct effect on quality were 43.2% in palisade parenchyma. 26.5% in spongy parechyma. 17.7% in tissue ratio, 6.7% in leaf thickness, 3.1% in intercellular space, 2.8% in leaf type and in chemical components, were 40.6% in nicotine. 35.7% in T-sugar/nicotine, 10.0% in total sugar, 7.0% in T-nitrogen/nicotine, 4.6% in total nitrogen, 2.1% in petroleum ether extract. The optimum topping depth were desirable at topping under second leaf from floral axis at late flower stage in A grade field and at early flower stage in B grade field for good leaf quality.
Varietal Responses of Soybean Germination and Seedling Elongation to Temperature and Polyethylene Glycol Solution
Rak Chun, Seong ; Hae Joon, Chung ; Eun Hi, Hong ;
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 1, 1988, Pages 31~37
Germination and seedling elongation of soybeans [Glycine max. (L.) Merr., cults. Bangsakong, Hill, Paldalkong, Danyupkong, Baegwun-kong. Kwangkyokong, Changyupkong and Hwangkeumkong] were measured at two temperatures (15 and 30
) and four polyethylene glycol 10,000 (PEG) solutions (0, 20, 30 and 35g/100g-H
O). Adjustments of PEG solution were based on water potentials of 0.0, -0.5, -1.1 and -1.5 MPa at room temperature. Observations were made at 3, 6, 9 and 12 days for 15
and 1, 2, 3 and 4 days for 30
. Fifteen seeds of each cultivar were placed on Whatman No. 1 (9cm) filter paper in plastic pertridishes, and adjusted to 15 ml of the proper PEG solution supplemented with 0.2 percent thiram using automatic syringe. The dishes were covered with cap. The seeds were germinated at a continuous temperature of 15 or 30
under dark conditions for programmed period. Seedling moisture content and seedling length of eight soybean cultivars decreased as PEG concentration increased both at 15 and 30
. Cultivar differences in seedling moisture content and seedling length were found among eight soybean cultivars at temperatures of 15 and 30
. Larger sized cultivar absorbed more moisture than samller sized cultivar. However, reverse results were obtained on the seedling moisture content of each of eight soybean cultivars. Cultiver Hill and Paldalkong showed greater seedling length than the other six cultivars from 20 to 30g/100g water of PEG concentrations both at 15 and 30
. The results of this study indicated that germination test of soybean seeds in aqueous solutions of PEG has potential for screening soybean cultivars for improved emergence during moisture stress.
Studies on the Varietal Response of Soybeans to Nitrogen Application level Under the Different Soil Acidity I. Effects of pH and Nitrogen Application Level on Nodulation, Allantoin-N and Total Nitrogen Content of Soybean Plants
Kwang-Ho Kim ;
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 1, 1988, Pages 38~47
To determine the response of soybean cultivars to nitrogen in relation to acidity, nodulation, content of allantoin nitrogen and major chemical compositions of soybean plants were investigated with two cultivars under two levels of soil pH and four levels of nitrogen fertilization in a field and nutri-culture experiments. Nodulation and contents of allantoin nitrogen, total nitrogen, potassium, calcium, magnesium and manganese of soybean plants decreased under acidic condition, but the degree of decrease was smaller in the variety Jangbaegkong compared to the variety Danyeobkong. On the other hand, nodulation, content of allantoin nitrogen and potassium decreased with increased nitrogen fertilization, particulary under pH 7 condition. Nodulation was positively correlated with the content of allantoin nitrogen of soybean plants. The content of total nitrogen of soybean plants increased with increased nitrogen fertilization, and this tendency was remarkable under acidic condition and in the variety Jangbaegkong.
Feed Value of Pearl Millet [Pennisetum americanum(L.) Leeke] Grown as a New Forage Crop
Keun-Yong Park ; Rae-Kyung Park ; Byeong-Han Choi ;
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 1, 1988, Pages 48~53
Pearl millet has been detected as a promising new forage crop of excellent quality and productivity since 1985. Its green fodder yields were 10.7 to 12.8 tons per hectare in average of 26 accessions in Suwon, 1985. The yield level was much higher than those of Italian and pro so millets and com. Com was better than Italian and proso millets, and proso millet was better than Italian millet for a green fodder crop. Suwon 1 pearl millet hybrid was the best of the 13 hybrids examined in Suwon, 1986 being 149 tons per hectare of three times cut green fodder yields. The pearl millet hybrid was higher in green fodder yield than com and sorghum/sudan grass hybrids. Leaf area index was 32.4 for the three times cut pearl millet, while 5.8 for the one time cut corn, and 20.8 for the three times cut sorghum/sudan grass. Crude protein content was 16.3 percent for pearl millet being six to five percent higher than corn and sorghum/sudan grass, 11.8 percent for the one time cut at maturity and 16.1 percent for four times cut being higher than corn and sorghum/sudan grass. Crude fat content was 3. percent for pear 1 millet grain being some what higher than corn and sorghum/sudan grass and 1.3-1.4 percent for green fodder crop. Crude fiber content in grain was 1.9 percent for pearl millet 2.6 percent for corn, and 4.3 percent for sorghum/sudan grass. Crude fiber content in pearl millet plant was 24.4 to 26.8 percent, Crude ash content was 2.4 percent in grain and 10.8 to 11.6 percent in the plants of pearl millet hybrid. In vitro digestibility of grain was 93.7 percent for pearl millet, 95.4 percent for corn, and 55.8 percent for sorghum/sudan grass. The digestibility of whole plant was 57.6 to 63.4 percent for pearl millet, 46.3 percent for corn, and 47.3 to 57.6 percent for sorghum/sudan grass. Heavier nitrogen fertilizer applications increased green fodder yields, protein content and digestibility, but reduced fat and ash content of pearl millet inbred line T 186.
Studies on the Germination of Korean Ginseng(Panax ginseng C.A.Meyer) Seed I. Influences of Nonstratified Seed on Embryo Growth and Germination
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 1, 1988, Pages 54~58
To define natural embryo growth and germination of the Korean ginseng (Panax ginseng C.A.Meyer) seed, freshly harvested and depulped seeds were seeded on nursery bed at Aug. 5 without stratification. At 100 days after seeding, embryo/endosperm length ratio of the seeds in nursery bed was higher than that of the seeds which were stratified with conventional method for 100 days. And also there was no significant difference between dehiscence ratio of the seeds in nursery bed and that from stratification with sand. The germination ratio of the ginseng seeds seeded without stratification at Aug. 5 was about 57% in average of 2 years and was not significantly lower than that of the seeds seeded after stratification at Nov. 15. And there were also no significant differencies of plant growth after germination between the ginseng seedlings from two seeding methods.
Studies on the Germination of Korean Ginseng (Panax ginseng C.A.Meyer) Seed II. Influences of Temperature and Seed Treatment on Embryo Growth and Germination
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 1, 1988, Pages 59~63
Freshly harvested and depulped Korean ginseng seeds were subjected to the seed treatment of removing endocarp plus surface sterilization with sodium hypocloride, surface sterilization only, and nontreated control. These seeds were stratified at temperatures of 5
for 20, 40, 60, 80 and 100 days. Embryo growth of the ginseng seeds of which endocarp was removed was most rapid in each stratification temperature and that of sterilized seeds was slower than unsterilized seeds after 80 days stratification at 15
. About 15
was an optimal stratification temperature for embry growth in ginseng seeds. Chilling treatment at 5
for 100 days was needed for better germination of dehisced ginseng seeds. An optimal germination temperature for the ginseng seed following chilling treatment was about 15
Fixation and Assimilate Transformation in Barley Leaves
Paek, Kee-Yoeup ; Lee, Sung-Sik ;
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 1, 1988, Pages 64~69
Young barley plants (Hordeum vulgare) were exposed to
for 10 and 30 minutes. Leaves were harvested and extracted for aqueous soluble metabolites which were fractionated into amino acids, sugars, sugar phosphates and organic acids. It was found that both 10 and 30 minute incubation periods had similar quantities of label but differed in the quality and quantity. It was also found that the neutral fraction (sugars, phosphate esters and organic acids) had 4.5 times more label than the amino acid fraction at 10 minutes and only about 1.7 times at 30 minutes. Label increased moderately from 10 minutes in the sugar fraction where there was a large increase in the amino acid fraction, both qualitatively and quantitatively. Photosynthetic rate was found to be quite different when the 10 minute incubation and the 30 minute incubation were compared (0.125 vs 0.034 and 0.042
/mg chlorophy 11/min respectively).
Maturity Effects on Moisture, Total Sugar Contents and Flavor of Fresh Waxy Corn
Keun-Yong Park ;
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 1, 1988, Pages 70~73
The changes of kernel size, contents of moisture and total sugar, and rates of flavor and stickiness of a waxy corn (cv. Hongcheon native) were observed from 15 days after silking (DAS) to 40 DAS at Suwon and Cheongju in 1984, nespectively. Fresh kernel length and width greatly increased from 15 DAS to 30 DAS and slightly increased thereafter. Fresh 100-kernel weight was markedly increased during 15 DAS to 30 DAS, and slightly and continuously increased thereafter while dry 100-kernel weight almost linearly increased with maturity. Total sugar content of fresh kernel was the highest at 20 DAS and then continuously decreased with maturity. Flavor and stickiness rates of boiled waxy corn were significantly increased during 15 DAS to 30 DAS and flavor rate decreased thereafter. However, stickiness rate maintained the level until 35 DAS and then decreased slightly. The optimum harvest date for fresh waxy corn seems to be about 30 DAS considering kernel size, and flavor and stickiness rates of boiled corn.
Population of Laodelphax striatellus, Percentage of Rice Black-streaked Dwarf Virus(RBSDV) Viruliferous Vector and RBSDV Infection of Maize in Different Locations
Keun-Yong Park ;
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 1, 1988, Pages 74~80
Seasonal population changes in Laodelphax striatellus Fallen (small brown planthopper), percentage of rice black-streaked dwarf virus (RBSDV) viruliferous L. striatellus, and RBSDV infection of 11 corn hybrids were observed at various locations and years. The population size of L. striatellus was relatively small in the middle parts of Korea, but it was much greater in the southern areas. The population size of the first generation of adult L. striatellus emerged from late April to early May was similar or smaller compared with that of the second generation emerged in middle June in the middle parts of Korea. However, in the southern areas the population size of second generation was much greater than the first generation. The percentage of RBSDV viruliferous L. striatellus differed depending on the years, locations, and testing methods. The percentage of viruliferous vector was highest in southern plain areas and it tended to decrease with distance from the areas. The percentage of viruliferous vectors tested by enzyme-linked immunosorbent assay was higher than that tested by rice seedling test. The RBSDV infection rate of corn hybrids was highest at Daegu and ranged from 9 to 39% probably due to both a higher L. striatellus population and a higher percentage of viruliferous vectors. However, it was significantly lower in other areas and ranged from 0 to 13%.
Major Agronomic Characters and There Correlation Ships in Wanggol (Cyperus iwasakii Makino) Varieties
Jung-Il Lee ;
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 1, 1988, Pages 81~86
This experiment was carried out for estimating genetic parameters, such as heritabilities, the phenotrpic and genotypic correlations of major agronomic characters with 64 cultivars in wanggol. Heritabilities of leaf length, number of leaf, stem length, stem diameter, number of stem and dry weight of medulla were higher, but that of dry weight of cortical were relatively lower. The genotypic correlation coefficients between stem length and dry weight of medulla, and between stem length and dry weight of cortical showed highly positive correlation, and stem length, stem diameter and dry weight of medulla were significantly correlated with dry weight of cortical, those characters gave high direct effect as same level in path-coefficient analysis.
The Relation of the Quality of Oriental Tobaccos to their Chemical Constituents I. Comparison of Quality and Chemical Properties of Leaf Tobacco Produced from Different Location and Season
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 1, 1988, Pages 87~96
Some climatic factors and quality-ralated chemical properties were compared among conventional late and early transplanting in Korea, and conventional growing in Greece where climate for tobacco growth and quality is quite different from Korea. Precipitations were lowest and sunshine hours were highest for greece planting. Rainfall was 40% or less and the number of sunshine hours was higher by 20% or more in early transplanting than in conventional late planting during the period from 30 days to 80 days after transplanting in Korea. The content of total nitrogen, nicotine, petroleum ether extracts of leaves were much higher in Greece planting than those in Korea planting. The content of volatile organic acids and volatile neutrals were highest with Greece culture, followed by early and late transplanting in Korea. The leaf quality evaluated by price showed the same trends. Ash content and pH level of leaves were considerably lower in early transplanting than late planting. Petroleum ether extracts, volatile organic acids and total nitrogen showed significant positive correlation coefficients with assigned grade price, while ash content showed significant negative correlation coefficients. Quality indices were deviced and applied for the Quality evaluation.
Direct Seeding Cultivation on Submerged Paddy in Rice II. Dissolved Oxygen Uptake and Germination Properties of Rice Varieties in the
;Dong-Sam Cho;Rae-Kyung Park;
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 1, 1988, Pages 97~101
The objective of this paper was to examine the oxygen requriement of rice seeds when the seeds were germinating under the water. The trial was carried out in the laboratory with the different water temperature (25
) in the Crop Experiment Station, Suwon. The tested varieties were 6 in japonica and 6 in indica (I)
japonica (J). In the 25
water temperature rice seeds absorbed more dissolved oxygen (DO) and germinating duration was shorter than in the 17
water temperature. DO uptake of japonica rice seeds was faster than that of indica
japonica rice seeds, and the germinating ratio of japonica rice seeds was higher than that of I
J rice seeds in the water. DO requirements of germinating rice seeds in the water were average 82.4
g per seed up to coleoptile appearance and average 123.6
g per seed up to appearance of radicle in the japonica varieties, but I
J varieties were 96.9
g and 145.1
g respectively. Especially when the rice seeds were germinated in the water, length of coleoptile and radicle of japonica rice were significantly longer than those of I
J rice varieties.