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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
Effects of Urea Rate and Maturity on the Yield, Quality, Nitrogen Compound and Nitrate Reductase Activity of Burley Tobacco
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 3, 1988, Pages 209~214
This experiment was carried out to determine the effect of nitrogen rate and maturity on the yield, quality, nitrogen compound, protein pattern, and nitrate reductase activity. The results were as follow. As the nitrogen rate increased, the degree of red color of cured leaf increased. According to the time of harvesting at their leaf position, the price of the lugs is lowest in immature stage compared with mature and over mature stage but the upper leaves were lower than mature and immature stage in price. Yield are equal in immature stage and mature stage but over mature stage is lower than mature and immture stage. There was no different protein pattern and nitrate reductase activity in nitrogen rate and mature stage.
Modeling for Predicting Yield and
-Acid Content in Hop (Humulus lupulus L.) from Meteorological Elements I. A Model for Predicting Fresh Cone Yield
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 3, 1988, Pages 215~221
The hop yield prediction model developed based on meteorological elements in Hoeongseong was Y=6,042.846-17.665
of 0.9991, R
of 0.9962 and
of 7.00. The minimum air temperature at early growing stage (
), the total precipitation at cone ripening stage (
), the maximum air temperature at flower bud differentiation stage (
) and the maximum air temperature at flowering stage (
) influenced on hop yield as decrement weather elements. The average air temperature at early growing stage (
) and the total sunshine hours at cone development stage (
) influenced on hop yield as increment weather elements.lements.
Performance of Rice Varieties at the Different Levels and Time of Nitrogen Application
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 3, 1988, Pages 222~228
This experiment was carried out to investigate the effects of N levels (0,10,20,30kg/10a) and N split rates [the rates of basal＋top dressing 15 days after transplanting (DAT) : top dressing 25 days before heading (DBH) was 100 : 0, 80 : 20, 60 : 40 ] on the growth, yield, yield components, and N uptake of Seomjinbyeo (J) and Samgangbyeo (I
J). The maximum tillering stage occurred in the middle of July in both varieties, but Samgangbyeo showed the second maximum tillering stage in the middle of August probably due to the retarded early growth caused by low temperature in the tillering stage and to favoring temperature in August. Grain yield of Seomjinbyeo was similar among the N levels from 10 to 30 kg/10a without occurrence of rice blast and lodging, but that of Samgangbyeo increased as N level increased upto 30 kg/10a. Grain yield of Seomjinbyeo was higher when N was applied three times (basal and two top dressings 15 DAT and 25 DBH) compared with two times (basal and top dressing 15 DAT), but that of Samgangbyeo was not different among the N split rates. Total N uptake and the proportion of fertilizer N to the total N uptake increased as N level was higher. N uptake tended to be higher as proportion of basal＋top dressing 15 DAT increased in early growth stage, but it was higher as proportion of N applied 25 DBH increased in the late growth stage. The N efficiency to produce grain per absorbed N unit decreased as N level decreased in Seomjinbyeo, but similar in Samgangbyeo.
Agronomic Characters and Feed Value of Corn Infected by Rice Black-Streaked Dwarf Virus
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 3, 1988, Pages 229~235
Several agronomic characters, feed value, and mineral uptake of two corn hybrids infected by different degrees of rice black-streaked dwarf virus (RBSDV) were studied at the south-eastern part of RBSDV prevalent areas in Korea. Although both hybrids were infected with RBSDV by 100%. culm length of Suweon 19 was more severely reduced than that of Jinjuok and there were positive correlations between culm length and top dry weight of individual plants. The reduced culm length was largely due to the shortened length of upper five internodes in both hybrids and also due to the reduced number of internodes in Jinjuok. As culm length reduced, percent ear-bearing plants, average ear weight, and number of kernels per ear reduced significantly in both hybrids. The kernel weight of Suweon 19 decreased with reduced culm length, but that of Jinjuok was similar among the different culm lengths. However, as culm length decreased, crude protein and fiber in whole plants and N, P, K, Mg in culm ＋ leaf sheath increased, but nitrogen free extract in whole plant decreased. And crude fat in whole plant and N, P, K, Mg concentrations in leaf blades and ear were similar among the culm lengths.
The Differential Internode Elongation Responses of Dwarf and Tall Japonica Rice Cultivars to
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 3, 1988, Pages 236~241
The responses of GA
treatment on the culm length, internode elongation, number of internodes elongated and on the panicle length of 115 Japonica rice cultivars were studied. One spray with 50 ppm GA
was made at about 30 days before heading. Generally short culm cultivars showed better elongation responses than taller ones and a few taller cultivars showed reduced culm length. The internode length of 1st, 5th, 6th and 7th were increased, but, 2nd, 3rd and 4th internodes were reduced. Especially the reduction of 3rd internode elongation and the increase of 5th internode length was prominent. Most of the tested cultivars showed no changes in the number of internodes elongated, but, in some cultivars it was increased and in a few ones it was reduced. The effect on the panicle length was variable depending cultivars. No significant correlation was found between the culm length elongation and the elongation of panicle length, implying that the response of GA
on the culm and on the panicle is independent of each other. According the response of culm length elongation tested cultivars were grouped into 6 ; Significantly reducing, slightly reducing, less sensitive, slightly elongating, largely elongating and extremely elongating.
The Relation of the Quality of Oriental Tobaccos to their Chemical Constituents II. Quality and Chemical Properties as Affected by Soil Moisture
Ik-Sang Yu ;
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 3, 1988, Pages 242~247
To elucidate the relationship of the quality of aromatic tobaccos to their chemical constituents, certain chemical components and leaf quality by price were compared among cured leaves produced under different soil moisture levels during growing season. As the soil moisture increased, plant height and the length and width of largest leaf increased. days to flower was shortened and total chlorophyll and carotenoid content of green leaf decreased. As the soil moisture increased, leaf quality was deteriorated. The content of nicotine, pet. ether ext. and total nitrogen increased with slight increment of nonvolatile organic acids and higher fatty acids, but ash content and pH of cured leaves decreased under high soil moisture content. Volatile organic acids such as 3-methyl pentanoic acid, the main compounds contributing to the aroma of oriental tobacco, and most volatile neutrals decreased conspicuously under high soil moisture. The content of pet. ether ext., volatile organic acids, volatile neutrals, ash and pH of cured leaves were found to be the appropriate factors for the quality evaluation of aromatic leaves grown under under different soil moisture.
Studies on the Viability of Cultured Anther in Rice Anther Culture I. Changes of Respiratory Activity by Genotype and Cold-pretreatment
Seung Yeob, Lee ; Seon Yong, Lee ; Jang Soo, Choi ;
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 3, 1988, Pages 248~253
The longer pollen stage grew to flowering stage, the higher anther respiratory rate in vivo became. and it was rapidly increased just before flowering. The anther respiratory rate in vitro showed the first and second peak points after 3-7 days and 9-1l days in culture, respectively, and fastest and highest in Daecheongbyeo with high sporophytic potentiality. It was lower in cold-pretreatment than non-treatment at the early days, but higher from 15 days after culture. The frequency of browning anthers was promoted by cold-pretreatment. The respiratory rate was not different between uncolored and browned anthers at 12 days, but it was higher in browned anthers after 24 days in culture.
A Simulation Model for Estimating Evapotranspiration of Soybean Crop
Eung-Ryong Son ;
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 3, 1988, Pages 254~261
Lysimeter and field experiments were conducted in Sandy Loam to establish a simple estimation model for evapotranspiration (ET) of soybean for three years (l984-1986). Potential ET (PET) could be estimated by the eq.1 using Pan-evaporation (Eo) and was ranged from 1.1 to 4.6 mm/day during the experiments. PET (mm/day)=1.348＋0.573 Eo …(1) Crop coefficient (Kc=maximum ET/PET) could be estimated by the eq.2 using Growth degree (G=days after planting/total growing days) and was ranged from 0.2 to 1.1 and from 0.6 to 1.4 for monoculture cropping and double cropping followed by barley, respectively, during the experiments. Monoculture : Kc=0.016＋3.719 G-3.224 G
…(2), Double cropping : Kc=0.609＋2.014 G-2.120 G
…(2). However, the maximum Kc was shown when G was about 50% and 40% for the monoculture and the double cropping, respectively. Soil water coefficient (f=AET/maximum ET) could be estimated by the eq.3 using soil water tension (Ψ) in 15cm depth. and it was decleased to 0.2 when Ψ was 10 bar. f=0.755-0.537 log │Ψ│…(3) Consequentially, the model to estimate the Actual ET (AET) of soybean was determined as eq.4 with the correction coefficient of -0.380. AET(mm/day)=PETㆍKcㆍf -0.380 …(4) The estimated AET were compared with the measured AET to verify the model established above. The average deviation of the estimated ET(AET) was 0.5782
0.338 (mm/day), and it would be within reasonable confidence range.
Effects of Plant Growth Regulator Treatments During the Grain Filling Period on Seed and Viviparous Germination in Rice
Kwang-Ho Kim ;
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 3, 1988, Pages 262~269
Experiments were conducted to find out the method of reducing viviparous germination of rice seeds using growth regulators during grain filling period. Among the recommended varieties, early Japonica type showed higher rate of viviparous germination, while late Japonica type and Tongil type varieties did not show viviparous germination in field condition. Grain showed high germination ability from 30 days of grain filling period in Daeseongbyeo of Japonica type and 35 days in Taebackbyeo of Tongil type. Growth regulators, NAA, CMH and Reglone were effective for reducing viviparous germination to the two rice varieties and three treatment stages in this experiment. NAA and CMH were most effective at 100 ppm and Reglone was at 0.4-0.6% concentration. Germination rates of rice seed were not different from non-treatment when NAA CMH were treated, while Reglone lowered germination rate. NAA and CMH had no effects on grain filling rate for both varieties, which showed high grain filling rate as the non-treatment, but Reglone results low grain filling rate. Grain color was not changes when NAA was applied, while CMH and Reglone made a lot of grain to dark brown as the concentration became higher. When grain were hulled, NAA had no difference with the non-treatment whereas CMH and Reglone had lower rate of perfect brown rice when they were applied at 20-30 days after heading.
The Gene Effect of Culm Length and Ear Length Using Isogenic Lines in Barley
Chang-Hwan Cho ; Eun-Sup Lee ;
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 3, 1988, Pages 270~280
This experiment was conducted to evaluate the main effects and pleiotropic effects of two comparable isogenic lines for culm and spike length in hulled barley and observed various agronomic characteristics, yield and yield components under the conditions of heavy fertilizer application and high planting densities. Three isogenic lines, culm, spike and culm and spike, were planted and to obtain basic data for improving high-yielding and quality of hulled barley at Experiment Farm, Dankook Univ., Cheonan city in 1985. Differences of culm length between two comparable isogenic lines, short culmed line (SCL) and medium culmed line (MCL), in isogenic lines for culm length showed highly significant differences. And differences of spike length between two comparable isogenic lines, short spike line (SSL) and medium spike line (MSL), in isogenic lines for spike length showed highly significant differences. Differences of culm and spike length between two comparable isogenic lines, short culmed and spike line (SCSSL) and medium culmed and spike line (MCMSL), short culmed and spike line (SCSSL) and long culmed and spike line (LCLSL), in isogenic lines for culm and spike length showed highly significant differences. Characteristics affected highly by the genes of culm length in isogenic lines for culm length were heading days, the 1st and 2nd internode length, No. of grains per spike, No. of spikes/m
, and one litre weight. Characteristics affected highly by the genes of spike length in isogenic lines for spike length were No. of spike nodes, heading days, maturity days, thousand grain weight and one litre weight. Characteristics affected highly by the genes of culm and spike length in isogenic lines for culm and spike length were No. of spike nodes, the 2nd, 3rd and 4th internode length, thousand grain weight and grain yield. Grain yield of SCL, MSL, MCMSL and SCSSL was more than grain yield of MCL, SSL, SCSSL and LCLSL, respectively. Maturity days of SCL, MSL, SCSSL and LSLSL were faster than maturity days of MCL, SSL, MCMSL and SCSSL, respectively.
Studies on Processing Techniques in Barley I. Effect of Polishing Conditions of Hulled Barley on Grain Shape and Polishing Properties
Sung-Ho Bea ; Young-Sang Kim ;
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 3, 1988, Pages 281~286
These studies were conducted to find out the polishing methods that improve yield and quality of the polished barley. Four varieties of hulled barley, Dongbori 1. Bunong, Kangbori and Suwon 182 which were produced in Suwon, Korea in 1979, were subjected to this experiment. The polishing machine, manufactured by Satake Co, was used as test mill. Increasing the roller speed of polishing machine causes more polished barley in a unit period. The speed influenced more in length than thickness or width of grain. Therefore the shape of grain became bold type as the speed increased. The optimum roller speed was 1,300rpm in ideal shape of polished barley. The lowest hardness was observed in the husk layer and the hardness was found in the decreasing order of the aleurone, testa, peri carp and the endosperm layer. The thickness of bran layer, weight of 1,000 kernel and hardness of polished barley were greatly different according to barley varieties. Also the length, thickness, width and the ratio of length to width of barley grain were significantly different in barley varieties. The ratio of length to width of the polished barley was 1.59 in Suwon 182, 1.53 in Bunong, 1.51 in Kangbori and 1.26 in Dongbori 1.
Studies on Processing Techniques in Barley II. The Processing and Cooking Quality of Cut-polished Barley in Naked Barley
Young-Sang Kim ;
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 3, 1988, Pages 287~291
These studies were carried out to find out the polishing properties and cooking quality of the cut-polished barley. Naked barley, Youngsanbori which was produced in Chonnam province, Korea in 1981, was applied for this experiment. Polished barley was produced by the conventional method and cut-barley was manufactured by the method established by Wheat and Barley Research Institute. The yield of cut-polished barley was 68.2% and that of conventionally polished barley was 70.1 %. The ratio of length to width was 2.88 in cut-polished barley and that of conventionally polished barley was 1.36. And weight of 1,000 kernel was 9.5g in cut-polished barley and 18.5g in conventionally polished barley. Energy consumption was found to be 91.1
Agricultural Use of the Plant Growth Regulators II. Effect of Uniconazole and Pachlobutrazol Treatment on the Rice Seedling Growth
Soon-Chul Kim ;
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 3, 1988, Pages 292~297
kW/1,000 kg in conventionally polished barley and 105 kW/1,000kg in cut-polished barley. Whiteness, water uptake ratio and expanded volume of cooked barley were 45.5, 225.7 and 283% in conventionally polished barley and 49.5, 312.7 and 318% in cut-polished barley, respectively.
Effects of Cultural Practices on Ripening Characteristics of Japonica and Tongil Type in Rice (Oryza sativa L.)
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 3, 1988, Pages 298~308
An experiment was conducted to obtain the basic information on overgrowth of rice seedling using GA biosynthesis inhibitors such as uniconazo]e and pachlobutrazol. For this. three application times, just before seeding, 1.5 . leaf stage and 2.5 leaf stage, were tested with the different dosages. For shortening effect of plant height, uniconazole had greater effect than pachlobutrazol. The shortening of plant height by plant growth regulators were mainly due to shortening effect of the leaf sheath rather than leaf blade. For soil incorporation treatment, shortening effect was continued until 30 days after seeding while this was decreased thereafter. Early application and high dosage generally resulted in high shortening effect. The ratio of dry weight was decreased by chemical application and the shortening ratio of plant height was positively correlated with the healthy score.
Studies on Varietal Resistance to Sheath Blight Disease in Rice III. Variation of Varietal Resistance by Inoculating Different Fungus Isolates
Kwang-Ho Kim ;
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 3, 1988, Pages 309~314
This study was carried out to get information for the breeding varieties and developing the cultural methods with representative 32 cultivars which were diffused from 1900 to 1982 and two cultural methods which were old one i.e., low dressing and late planting and modern one i.e., medium dressing and early planting. Duration of transplanting between cultural practices were 15 days but the duration of heading date were 5 days. Panicle projecting duration was 5-10 days in all cultivars, especially, it is 5 days in early maturing varieties, 6-7 days in medium maturing varieties and 7-10 days in late maturing varieties. Periods from transplanting date to effective ripening date were 99.8 days in low dressing and late planting method, 106.2 days in modern one but the periods from heading date to effective ripening date were 31.4 days in low dressing and late planting method, 30.2 days in modern one. Ripening speed was very active from 5 to 10 days after heading and the daily increase of 1000 grain weight was from 847.8mg to 1130mg in that time and it slightly increased from 5 to 35 days after heading in japonica varieties but increased after heading and suddenly decreased at 30 days after heading in Indica/Japonica varieties. Meteorological factors (temperature and amount of solar radiation) were positively correlated with the ripening speed but negatively correlated with the period of physiological and effective ripening.
Varietal Differences of Photosynthesis and Grain Yield in Rice(Oryza sativa L.)
Ishii, Ryuichi ;
KOREAN JOURNAL OF CROP SCIENCE, volume 33, issue 3, 1988, Pages 315~321