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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 35, Issue 6 - Dec 1990
Volume 35, Issue 5 - Oct 1990
Volume 35, Issue 4 - Aug 1990
Volume 35, Issue 3 - Jun 1990
Volume 35, Issue 2 - Apr 1990
Volume 35, Issue 1 - Feb 1990
Selecting the target year
Effect of Nitrogen Fertilizer, Planting Density and Seeding Date on the Yield of OKra(Abelmoschus esculentus (L) MOENCH)
KOREAN JOURNAL OF CROP SCIENCE, volume 35, issue 3, 1990, Pages 179~183
In order to find out the effects of nitrogen fertilizer, planting density and seeding date of Okra (Abelmoschus esculentus (L) MOENCH), three nitrogen fertilizer level (4, 8 and 10kg N/10a), three planting densities (45
30cm and 90
30cm) and five seeding date (April 15, May 1, May 15, June 1 and June 15) were treated. Treatment of 8kg N/10a among nitrogen fertilizer level and 45
30cm among planting densities showed higher green and yield than the other treatments. The plot of 45
30cm with 8kg N/10a showed the highest yield. Among planting date, May 1 planting date obtained the highest yield.
Effect of Plant Growth Regulator 'Hoe 78784' on Lodging in Rice
Sang Chul, Lee ; S.K. De Datta ;
KOREAN JOURNAL OF CROP SCIENCE, volume 35, issue 3, 1990, Pages 184~194
This experiment was carried out at International Rice Research Institute (IRRI) farm to investigate the effect of plant growth regulators on lodging in rice and to determine plant characteristics when plant growth regulator applied at different concentrations and different times. The experimental plant growth regulator Hoe 78784 when applied at booting prevented lodging and significantly increased grain of IR 21820-154-3-2-3. However, they did not affect significantly the crop vegetative characteristics and yield component, except by decreasing plant height and internode elongation, and increasing the number of vascular bundles, and the thickness and diameter of the third and fourth internodes. But when applied at 30 DT, it significantly decreased grain yield of all test varieties due to shortened panicle length and increased unfilled spikelet percentage. Hoe 78784 applied at heading did not increase yield nor did it prevent lodging.
Effect of High Temperature and Water Management on Agronomic Characters in Rice
KOREAN JOURNAL OF CROP SCIENCE, volume 35, issue 3, 1990, Pages 195~200
These experiments were conducted to determine the effect of high temperature and water managements on growth and yield of rice. Shoot dry weight and percent of fresh roots were decreased when rice plant was exposed to high temperature, and also high temperature treatment decreased yield components of rice through spikelet number at meiotic, filled grain ratio and percent of fertility at heading, and 1,000 grain weight at ripening stage. Nitragen content of the rice varities was decreased by high temperature treatment regardless different growth stage, although Si content increased. Grain yield of rice varieties significantly decreased due to high temperature when rice plants were treated at heading stage followed by ripening stage. meiotic, young panicle initiation, maximum tillering and tillering stage in order. Effect of the continual submerging on temperature increased by 1.1
at daytime and by 3.7
at nighttime, but flowing water irrigation which can maintain optimum temperature reduced plant height and increased dry weight and percent of fresh roots. Flowing water irrigation showed higher yield by 4-8% compared to continual submerging method through increment of yield components such as spikelet number, filled grain ratio and 1,000-grain weight.
Effect of Mixture of Hymexazole and Metalaxyl on Growth and Low Temperature Injury in Rice Seedlings
KOREAN JOURNAL OF CROP SCIENCE, volume 35, issue 3, 1990, Pages 201~210
This study was carried out to determine the effect of mixture of hymexazole and metalaxyl(Tachigarace) on the growth and reducing low temperature injury in rice seedlings. The amount of mixture of hymexazole and metalaxyl (Tachigarace) applied to reduce low temperature injury was 0, 9, 18 and 36mgr per pot (5
10cm) by soil incorperation befor sowing. Aging seedling was investigated on the growth responses by the application of 0.36gr mixture of hymexazole and metalaxyl (Tachigarace) per tray (30
3cm) after cutting of leaf at 35 day-old seedling. Rice seedlings treated with mixture of hymexazole and metalaxyl (Tachigarace) were better in the growth of top and roots, dry weight, erecting and rooting abilities than untreated seedlings. The effective amount of mixture of hymexazole and metalaxyl (Tachigarace) to increase erecting and rooting abilities was 18 mgr per pot. Under low temperature treatment, 12
, the leaf discoloration and dead leaf percent of rice seedlings were markedly decreased in the seedlings treated with mixture of hymexazole and metalaxyl (Tachigarace) as compared with untreated seedlings. The more amount of mixture of hymexazole and metalaxyl (Tachigarace) upto 36mgr per pot, the more effective on the low temperature injury in the seedling. The effect of mixture of hymexazole and metalaxyl (Tachigarace) to reduce low temperature damage in rice seedlings was mainly due to decreasing less physiological activities on the expanding leaf area and rooting, transpiration, stomatal diffusion and chlorophyll content of the leaves and oxygen consumption of the roots. Plant height, top dry weight and leaf area of aging seedlings were increased with mixture of hymexazole and metalaxyl (Tachigarace) treatment and leaf cutting as compared with untreated seedling and intact leaf, respectively. The ratio of missing hill of aging seedling was increased with increasing the period of growing seedling and was decreased due to leaf cutting, whereas the effect of mixture of hymexazole and metalaxyl (Tachigarace) application was not observed. Rooting ability of aging seedlings was decreased with lengthening of the period of raised seedling and was increased with mixture of hymexazole and metalaxyl (Tachigarace) treatment and leaf cutting.
Effect of Defoliation on Seed Development of Rye and Triticale Cultivar
KOREAN JOURNAL OF CROP SCIENCE, volume 35, issue 3, 1990, Pages 211~217
This study was carried out to elucidate the effect of different time and severity of defoliation on the dry matter accumulation in grain of rye (cv, Paldanghomil) and triticale (cv, Sinkihomil). The weight of the 2nd leaf blade was the greatest and this was followed by the 3rd and flag leaf in that order. The chlorophyll content in leaf blade and sheath were decreased at lower leaf position (flag > 2nd > 3rd). The average chlorophyll content of rye was higher than that of triticale. The earlier and severer defoliation was made, the more grain weight was its was decreased. As the time of defoliation was made later and the degree of its was small, 1,000 grain weight was increased. The results showed that the effect of defoliation on 1,000 grain weight followed the order of the flag, the 2nd and the 3rd leaf. The greatest 1,000 grain weight was observed at the middle part of panicle, which followed by the top and bottom part in that order.
Lodging Related Traits of Rice Plants as Affected by ′KIM -112′ Application
Soon-Chul Kim ;
KOREAN JOURNAL OF CROP SCIENCE, volume 35, issue 3, 1990, Pages 218~223
This experiment was carried out to obtain basic information on the lodging characteristics and yield components of rice plants by new anti-lodging reagent 'KIM-112' (3%, Wp) application at 30 days before heading (DBH) to 5 DBH under two dosage levels (lg 2g, a. i. /10a) at the Yeongnam Crop Experiment Station in 1989. Culm length was shortened by 10-17% at 1g, a. i. /10a and by 16-23% at 2g of KIM -112 applications. The shortening effect of internode was different by dosages and application times: 2g treatment was greater effect than 19 and early application resulted in shortening of lower internode while this was upper internode at the late application. There were positive correlation between culm length and lodging index, the 1st and the 4th internode lengths had on important effect to lodging index. Thickness of culm wall, culm diameter and weight of basal part of culm were not affected by KIM-112 application. However anti-lodging characters improved by increasing the breaking weight and by decreasing the moment. Lodging index was related to breaking weight, moment and weight of panicle. Heading date by KIM-112 application was delayed one to four days and number of grains per panicle was decreased by shortened panicle length as compared with untreated control, but yield capacity was high a little because of improvement ripening ratio by no lodging.
Influences of Water-logging Period at Different Growth Stages on Agronomic Characters in Sesame
KOREAN JOURNAL OF CROP SCIENCE, volume 35, issue 3, 1990, Pages 224~232
This study was conducted to find out the improvement of water-logging injury which is an important factor of yield loss in sesame. Water-logging was treated at 10, 25, 40, 55 and 70 days after emergence for 24, 48 and 72 hours in sesame variety 'Ansanggae'. Some important agronomic characters were investigated after treatment. The important agronomic characters such as plant height, leaf area, dry matter weight, capsule setting stem length, number of capsules per plant, ripenning rate and 1,000 grain weight were most susceptible at 55 days after emergence by the water-logging treatment, and the longer period of water-logging, the more susceptible. Allmost of the useful agronomic characters were able to get over injury of water-logging only within 25days after emergence, but could not get it over since 40days. Grain yield was decreased due to the water-logging treatment by 69 to 86% in 55 days after emergence that is most susceptible stage for water-logging as compared with the untreated control which is 13g per pot, and the longer period of water-logging induced the lower yield. Oil content of grain showed significant decrease only in 55 days after emergence but the composition of fatty acid did not influenced by the water-logging.
Cross Affinity of Korean Weedy Rice to the Cultivars
Mun-Hue Heu ; Hak-Soo SUH ;
KOREAN JOURNAL OF CROP SCIENCE, volume 35, issue 3, 1990, Pages 233~238
Weedy rice(red rice) collected in Korea were crossed with the Japonica, Javanica and Indica tester cultivars, and also crossed among those collected lines. Their seed fertility was counted and refered to their cross affinities. Some tester cultivars such as, Suweongjo, Malagkit Sinaguing and wx 817 which were regarded as belong to the Japonica, Javanica and Indica respectively, showed the typical tendencies of hybrid sterility when they were crossed each other. But, other testers such as Kwanak, Tapaiko, Belle Patna and Tarichaosun showed some differencies from those typical patterns, implying some varigations within a ecotype. The hybrids of weedy rice crossed to the Japonica testers showed higher fertility with a few semisterilities. While the crosses of weedy rice to the Javanicas or Indicas showed high sterility implying closer affinity relationships of weedy rice to the Japonicas. Even those weedy rice lines such as Samsanmyeon 8 and Sanchungaengmi B which showed semi-sterility when they were crossed to the Japonica testers showed high sterility when they were crossed to both Javanicas and Indicas. The hybrids among weedy rice lines showed high fertility raning 69% to 96%. Even those weedy rice lines which showed semi-sterility in the crosses with Japonica testers, showed high-fertility when they were crossed with those weedy rice lines. Though the amylose content, Alkali Digestive Value, Phenol reaction and grain shapes of theose weedy rice lines showed divers variations, the cross affinities of them showed closer phylogenie relationship to the Japonicas than to Japvanicas or Indicas. But the genetic influinces of Indicas to those weedy rices were not ignorable.
Relationship between Degree of Grain Shedding and Histological Peculiarities of Abcission Region of Red Rice(Oryza sativa L.) Collected in Korea
KOREAN JOURNAL OF CROP SCIENCE, volume 35, issue 3, 1990, Pages 239~247
In order to investigate the degree of grain shedding of red rices collected in Korea, breaking tensile and breaking bending strengths of 269 varieties; 82 Korean and 100 foreign red rices and 87 Korean cultivars including 26 native varieties, 30 Japonica-Indica hybrids and 31 Japonica type varieties, were measured at harvest time. Also, histological characteristics of abscission region between spikelet and pedicel were observed. The breaking tensile and breaking bending strengths of both Korean and foreign red rices were weaker than those of Japonica-Indica hybrids which were known as easily shedding varieties in Korea. Abscission layers were observed in the majority of Korean red rices except for 5 varieties, and those of all varieties belonging to both long grain types and 'Sare's were cracked completely at harvest time, while those of round grain types were not cracked except one variety. The breaking tensile and breaking bending strengths of the tested varieties having cracked abscission layer were weaker than those of non-cracked ones. Both strengths of breaking tensile and breaking bending were positively correlated with diameter of supporting zone and thickness of sclerenchyma tissue surrounding central vascular tissue of suporting zone at 0.1% significant level, respectively.
Effects of Temperature, Polyethylene Glycol and Sulfuric Acid Treatments on Germination of Chinese Milkvetch
;Keun-Yong Park;Jae-Young Cho;
KOREAN JOURNAL OF CROP SCIENCE, volume 35, issue 3, 1990, Pages 248~253
Germination and seedling growth of chinese milkyetch (Astragalus sinicus L. Line A) seeds were measured at four temperatures (15. 25. 30, and 35
), three polyethylene glycol (PEG) 10.000 (MW) solutions (0, 20 and 25 g/100
O), and five sulfuric acid treatments (conc, H
: Seeds/weight base: 0, 1:1 10min.. 1:1 20min.. 1:1.5 10min. and 1:1.5 20min, immersion), Adjustments of PEG 10.000 solutions were based on water potentials of 0.0, -0,5 and -0.8 ㎫ at room temperature. Observations were taken at 7 days for each treatment combinations. Germination percent of chinese mikvetch seeds was the highest at 15
and seeding length was the longest at 25
. Both germination percent and seedling length were rapidly decreased as PEG concentration increased from 0 to 25g/100
O. The highest germination percent was found at PEG 20 and 25 of 15
among those of four temperatures, Sulfuric acid treatments showed little effect on germination percent and seedling length compared to untreated control, However. in the case of PEG 0, greater germination perccent was obtained at the treatment of 1:1.5 for 10 minutes immersion, The result of this study-indicated that germination of chinese milkvetch seeds was affected mostly by moisture stress conditions.
Determination of Sowing Date for Silage Corn Based on Growing Degree Days and Soil Temperature
Zhin-Ryong Choe ;
KOREAN JOURNAL OF CROP SCIENCE, volume 35, issue 3, 1990, Pages 254~258
In order to investigate the effect of sowing dates on some agronomical characters and yield of corn in southern part of Korea. a field experiment was carried out at Gyeongnam Provincial Livestock Breeding Station in chinju. Single cross hybrid corn (cv. Suwon #19) was sown from April 13 to June 2 with five-day interval in 1984 and 1984. The relationship between herbage and grain yield and various meterological measurements was evaluated. As the sowing dates were delayed. the days from sowing to seedling emergence were shortened, as more closely affected by the soil temperature at seedling emergence. growth period and was dependent on precipitation and temperature during the growth period. Based on the relationship between herbege dry matter yield of corn and soil temperature at seedling emergence, the estimated critical sowing date for corn in the southern Korea was March 23
Effect of Storage Conditions and Varietal Mixture on Quality of Malting Barley
Yong-Woong Kwon ; Eun-Sup Lee ;
KOREAN JOURNAL OF CROP SCIENCE, volume 35, issue 3, 1990, Pages 259~264
Improvement in production, post-harvest processing, quality grading, storage and malting process of malting barley is apparantly necessary to upgrade the beer quality and to reduce the losses in malt production. To establish the bases for the improvement, the present study examined the effect of storage conditions on the germinability of malting barley by quality grade of barley at production, and feasibility of mixing different varieties and different quality grades. Germinability of malting barley decreased significantly after 13 months of storage in the off-grade grain storage house, and after 15 months in the 1st grade storage house under the climate of Korea. Malting barley that was off-grade at harvest deteriorated faster than the 1st grade during 5 years storage under ordinary conditions. Mixing of varieites, different grain-quality grades or differently stored barleys seems to increase variability in germinating forces and germinability, resulting in uncontrollable malting processes and poor quality of malts and beer.
Quantitative Analysis of Dry Matter Production and its Partition in Rice II. Partitioning of Dry Matter Affected by Transplanting Date
KOREAN JOURNAL OF CROP SCIENCE, volume 35, issue 3, 1990, Pages 273~281
Two rice varieties, Samkangbyeo and Sangpungbyeo, were transplanted on 1/2000a pots at 6 different dates beginning on May 11 with 10 day interval in 1987 and at 4 different dates beginning on May 21 with 10 day interval in a paddy field at the Chungbuk Provincial Rural Development Administration. Dry matter distributions to stem and leaf sheath, leaves and ear at different growth stages were analyzed to provide basic informations neccessary for the development of dynamic growth model. Dry matter production was reduced as transplanting was delayed and the degree of reduction was greater at the transplanting later than June 1. Dry matter distribution to stem and leaf sheath was increased up to 60-70 days after transplanting with the maximum ratio between 60-70%, which were decreased to 37-43% in pots and 27-33% in field at the end of ripening stage. On the other hand, dry matter distribution to leaf blade was decreased from 40-50% at transplanting to 11-17% at harvesting. Ear dry matter distribution increased rapidly after heading and the distribution ratio was 42-49% in pots and 52-62% in field. Although regression equations to predict dry matter distribution to different parts of rice plant were satisfactory for individual experiment, the application to different experiment was not appropriate.
Effects of Combine Harvesting and Drying Methods on Grain Quality in Rice Cultivars
KOREAN JOURNAL OF CROP SCIENCE, volume 35, issue 3, 1990, Pages 282~286
Currently, mechanization and automation have been introduced into rice harvest and drying process due to the shortage of man power. After rice cultivars, Chucheong and Milyang #23 were cutted with manual method (H1) or harvested with combine (H2), the threshed grain were dried in natural sun-drying (D1), in natural air in-bin system (D2), or in contineous hot-air drier (D3). We have evaluated grain losses, operation hour, and grain quality on each harvest and drying methods. Shattering loss during harvesting with combine was not dirfered significant from that of manual method, but threshing loss was 1.2% higher in combine harvest than in manual. Operation hours required for combine harvest was 3.5 times faster than for manual, even without head threshing. There was a significant difference bel ween cultivars in harvesting loss, which Milyang #23, a Tongil rice had two times more grain loss than Chucheong, a Japonica rice. Drying hours required to reduce to 14% grain moisture content were ten days for H1D1, 5-9 days for H2 D1, 2-3 days for H2D2, and only 15 hours for H2D3, respectively. In grain quality, complete grain ratio after dehulling was decreased about four percent in H2D3 compared to H1D1. while it was lower in Milyang #23 than in Chucheong, Hot-air drier increased occurence of cracked and broken grain. Combine harvest increased significantly these incomplete grain ratio of :Milyang #23, but not Chucheong.