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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 34, Issue s02 - Dec 1989
Volume 34, Issue 4 - Dec 1989
Volume 34, Issue 3 - Sep 1989
Volume 34, Issue s01 - Jun 1989
Volume 34, Issue 2 - Jun 1989
Volume 34, Issue 1 - Mar 1989
Selecting the target year
Response of Flax Varieties to Planting Density
;Jong-Kyu Hwang;Eung-Ryong Son;Jung-Il Lee;
KOREAN JOURNAL OF CROP SCIENCE, volume 34, issue 3, 1989, Pages 225~228
Under the different conditions of planting density, maturation dates, stem length, oil contents, stem yield and seed yield of flax were investigated in 1984. The results were as followed: Wiera and Storment Goss were earlier in the maturation dates with increasing plant density, However Taijungsung #1 was delayed. Though there is a difference between the varieties stem length was getting longer with increasing plant density., Oil contents were getting higher with increasing plant density, stem yield and seed yield were increased with increasing plant density, on the contrary those were decreased by the growth of ciliary flax in the case of 1200 plants per 1.2m
. Therefore optimum planting density of flax culture was 12cm x 6cm.
Statistical Analysis of Meteorological Factors with the Leaf Quality of Flue-cured Tobacco II. The Proportion of the Respective Grades of the Thick Leaf and Meteorological Factors
KOREAN JOURNAL OF CROP SCIENCE, volume 34, issue 3, 1989, Pages 229~234
In flue-cured tobacco, the relationships between the quality of tobacco leaves (productivity according to quality grade) and specific meteorological factors were noted showing different significances according to different seasons during the growing period of the tobacco plants. The thick leaf high quality was significantly correlated with average temperature in late April, late May, early July and late July. The degree of contribution was greatest in middle May and lowest in late May. In the highest and lowest temperatures, the relations to leaf quality had similar tendency like in the average temperature; the thick leaf low quality showed opposite tendency relative to the high quality in the degrees of correlations and contributions. Amount of precipitation was significantly correlated with the thick leaf high quality in late April, early May, middle May, late June and late July. The degree of positive contribution was shown in order of late April, middle July and early July, and that of negative one was in order of middle June, early June and late June, respectively. Duration of sunshine period was highly associated with thick leaf high quality of tobacco leaves in all of the growing season except for middle April and middle July. The degree of positive contribution was in order of late May, late April, early July and middle July, and that of the negative one was in order of late June, early May, middle June and middle May.
Prevention of Barn Rot during Curing of Burley Tobacco I . Effect of Harvesting Time and Curing Condition
KOREAN JOURNAL OF CROP SCIENCE, volume 34, issue 3, 1989, Pages 235~238
This study was carried out to investigate the effect of environmental conditions of air temperature and relative humidity, varieties, and water content of leaves at harvesting time on the occurrence of barn rot during curing of burley tobacco. The curing environmental condition was combined with 4 air temperatures ranging from 25
and 3 different relative humidities. The harvested leaves with 3 different water contents were cured during the rainy season in curing barn. Barn rot occurred the most at 30
, and reduced at 25
and remarkably decreased at above 35
. But no barn rot was observed at 40
. In influence of relative humidity, the percentage of rotten leaves was highest at 100% RH and remarkably reduced at lower RH. Among two varieties, KB 101 was rotted smaller than Burley 21 under the all temperature and relative humidity conditions, however those considerably showed no difference. The rate of disease development increased in the lower leaves more than in the upper leaves. In the water content of leaves at harvesting time, 29.5% of the rotten leaves was observed at W.S.D. (water saturation deficit) 10.3%, but no barn rot was found at W.S.D. 6.4%.
Physiological and Ecological Response of Agronomic Characters Related to Source and Sink in Rice
KOREAN JOURNAL OF CROP SCIENCE, volume 34, issue 3, 1989, Pages 239~245
This experiment was conducted to study the physiological and ecological responses of agronomic characters related to source and sink relation in rice. Standard deviation and coefficient of variability of agronomic characters by individual tiller were greatly influenced by the lower internodes in the length of internode, flag leaf in the leaf blade, lower leaf blade in the leaf width, and the number and spikelets of secondary rachis branch in panicle. In relation to the parts of source and sink of rice plant and the number of spikelet in panicle, the number of spikelet was significantly correlated with the length and leaf area of second leaf blade, the length of second internode, and culm diameter of third internode. The correlation of the length of panicle with the length of internode and leaf blade was greatly influenced by the length of second leaf blade and second internode. The number of spikelet was increased with increasing the second rachis branch rather than first rachis branch. The content of total inorganic nutrients was greatest at leaf blade followed by leaf sheath and internode, and panicle.
Flowering and Pod Setting Characteristics of Cassia tora L. Grown under Different Planting Time
Kwang-Ho Kim ;
KOREAN JOURNAL OF CROP SCIENCE, volume 34, issue 3, 1989, Pages 246~251
A medicinal legume crop, Cassia tora L., was grown with four different seeding dates in 1986 field condition to find the flowering and pod setting characteristics. Initial flowering date and flowering duration were almost same between plants sown from April 20 to May 30, but those of plants seeded at June 20 were significantly delayed and shortened. Last flowering date, however, was not different between plants sown from April 20 to June 20. C. tora plants showed indeterminate flowering habit, and bloomed vigorously from fourth date after initial flowering. Numbers of flowers, ovules and pods per plant were decreased along with delaying seeding date, and ovule to flower ratio and pod to flower ratio were greatly decreased in June 20 seeding plot. Flowers bloomed on second week from initial flowering showed the highest number of ovules and pods, and flowers bloomed after early September did not develop to matured pods. Maximum values of pod length, number of seeds per pod and 1000-grain weight were obtained from flowers bloomed on second week from initial flowering of plants sown from April 20 to May 30, and first week in June 20 seeding plot.
Influence of Nitrogen Application and Shading on the Sterile-type Cold Injury in Rice
Dong-Woo Lee ;
KOREAN JOURNAL OF CROP SCIENCE, volume 34, issue 3, 1989, Pages 252~260
This experiment was carried out to clarify the causes of sterility in terms of pollination characteristics for the sterile-type cold damage as influenced by amount of nitrogen application and shading conditions in rice plants. The results obtained are as follows: The number of young microspore per anther was not changed greatly by amount of nitrogen application. The number of ripened pollen grains per anther decreased according to increase in nitrogen application and shading degree, but the anther length and stigma length were not significantly affected by those factors. The number of pollen grains on stigma decreased by intense shading. The fertility decreased with increased nitrogen application and intensified shading. The elongation of auricle distance per day was less in less nitrogen application and intense shading. The internode length of the first and the second from the top were shortened with intense shading, but that of the fourth was elongated. The number of spikelet per panicle decreased with increase in shading intensity.
Analysis of Agricultural Climatology in Cheju Island I. Distribution of Daily Minimum Temperature in Winter Season Estimated from a Topoclimatological Method
KOREAN JOURNAL OF CROP SCIENCE, volume 34, issue 3, 1989, Pages 261~269
Agricultural activities in Chejudo require more specialized weather services in this region. The meteorological information available from the Korea Meteorological Service (KMS) is limited in its areal coverage because the KMS stations are located along the narrow band of coastal area. topoclimatological technique which makes use of empirical relationships between the topography and the weather can be applied to produce reasonable estimates of the climatic variables such as air temperature and precipitation over remote land area where routine observations are rare. Presentation of these estimates in a from of fine-mesh grid map can also be helpful to upgrade the quality of weather services in this region. Altitude values of the 250 m grid points were read from a 1: 25000 topographic map and the mean altitude, the mean slope, and the aspect of the slope were determined for each 1 km
land area from these altitude data. Daily minimum air temperature data were collected from 18 points in Chejudo during the winter period from November 1987 to February 1988. The data were grouped into 3 sets based on synoptic pressure pattern. Departures from the KMS observations were regressed to the topographical variables to delineate empirical relationships between the local minimum temperature under specific pressure patterns and the site topography. The selected regression equations were used to calculate the daily minimum temperature for each 1 km
land area under the specific pressure patterns. The outputs were presented in a fine-mesh grid map with a 6-level contour capability.
Varietal Differences of Peroxidase Activites and Banding Pattern of Rice Plants under Flooding
KOREAN JOURNAL OF CROP SCIENCE, volume 34, issue 3, 1989, Pages 270~273
This study was carried out to know the physiological characteristics related to flooding tolerance of rice plants. Peroxidase specific activities and banding pattern of peroxidase isozyme of 24 days old seedlings were analyzed after 3 days of flooding treatment in the artificial flooding tank. Peroxidase activities of japonica rice varieties which were relatively susceptible to submergence were higher in comparison to those of Tongil and indica rice varieties. And a peculier band of peroxidase isozyme which was not shown in any part of rice plant if not flooded, was appeared at the around 9 of isoelectric point in the leaf blade of japonica rice varieties when flooded.
Effects of Clipping Method on Forage Yield and Quality in Pearl Millet [Pennisetum americanum(L.) Leeke]
Keun-Yong Park ; Rae-Kyung Park ; Byeong-Han Choi ;
KOREAN JOURNAL OF CROP SCIENCE, volume 34, issue 3, 1989, Pages 274~279
The objective of the study was to determine optimum clipping time, interval and height of Suwon 1 pearl millet hybrid in Korea to increase forage yield and quality. Clipping height 20 cm above the ground surface was the best resulting in producing 11.1 tons per hectare of green chop. However, clipping height 5 cm was not good for regrowth of the ratoon crop. Just after the first cutting when the plant height reached two meters around mid-July, four weeks cutting interval was the best for higher forage yield of 11. 4 tons per hectare. Crude protein content of the clipping height 20 cm was the highest being 12.8 percent. Dry matter of the first cut contained 14 percent of crude protein being the highest, and with lower crude fiber content of 24 percent. And also four weeks cutting interval was the highest in crude protein content being 13.1 percent along with lower crude fiber content of 24.2 percent. Thus, the forage yield depended on clipping height greatly, but the quality was dependent upon clipping time, interval and frequency more than cutting height pearl millet plant. It would be desirable for higher yield and quality of Suwon 1 pearl millet hybrid to cut three or four times during the growing season at 20 cm clipping height and at four weeks clipping interval from the first cut when the canopy height is above one meter under the Korean environmental conditions.
Growth Analysis of Maize with Tillers
KOREAN JOURNAL OF CROP SCIENCE, volume 34, issue 3, 1989, Pages 280~287
In order to know growing habit of the maize bearing tillers, IK//IRI/B68 with tillers was grown and compared with Jinjoo Ok which is not tillering, and several parameters were measured for analysis. The results obtained were summarized as follows. 1. The plant height and fresh weight of IK//IRI/B68 were lower than those of Jinjoo Ok until the tasseling stage of IK/ /IRI/B68, while then plant height and fresh weight of IK//IRI/B68 were higher than those of Jinjoo Ok after the tasseling stage of IK//IRI/B68. 2. The average number of tillers per plant of IK//IRI/B68 at maturity was 3.7 and the average tiller height of IK//IRI/B68 was almost the same as the height of the main stem. 3. The dry weight of IK//IRI/B68 at the early growing stage was lower than the check hybrid Jinjoo Ok, while it was higher than Jinjoo Ok at the later growing stage. 4. The LAI of IK//IRI/B68 after full expansion of the leaves was greater than that of Jinjoo Ok The LAIs of IK//IRI/B68 and Jinjoo Ok were 12.6 and 5.8, respectively. 5. The CGR of Jinjoo Ok was greater than that of IK//IRI/B68 until earey July while the CGR of Jinjoo Ok was lower than that of IK//IRI/B68 as the tillers of IK//IRI/B68 were fully developed. 6. The LAR and RGR of IK//IRI/B68 were greater than those of Jinjoo Ok until mid-July. The RGR of IK//IRI/B68 seemed to be affected by both NAR and LAR. The RGR of Jinjoo Ok seemed to be affected by LAR.
Effects of Nitrogen Level and Planting Density on Chemical Properties in Korean Native Tabacco Varieties
KOREAN JOURNAL OF CROP SCIENCE, volume 34, issue 3, 1989, Pages 288~295
This study was conducted to establish the most appropriate nitrogen levels and planting densities which can attribute to increase of aromatic substances in tobacco variety, Hyangcho, maintaining its original aroma. An increase of nitrogen fertilization from 3 to 12 kg per 10a increased total alkaloid content 2.0% to 3.3%, while an increased nitrogen fertilization decreased the contents of total sugar, starch, fatty acid etc., Which seem to be the positive components relating to tobacco aroma the contents of alkaloids were decreased and total fatty acids were increased as the planting densities increased. The higher contents of 2. 3-methylbutanoic and 3-methylpentanoic acid was obtained at the density of 3 plant per pit (12,498 plant/10a). The components determined in the neutural fraction such as solanone, furfural, furfurylalcohol and benzyl alcohol were presented in higher amount at the higher densities. The volatile acids such as 2. 3-methylbutanoic acid 3-methylpentanoic acid decreased and also the contents of butanol, furfutal, furfuryl alcohol, hexanol, cinnamil, acetophenone, benzyl acetate and solanone etc., were decreased as the nitrogen level increased from 3 to 12 kg per l0a.
Morpho-Physiological Studies on Elongation of Mesocotyl and Seminal Root in Rice Plant I. Varietal Differences and Effects of Seed Maturity and Storage Condition on Mesocotyl Elongation
KOREAN JOURNAL OF CROP SCIENCE, volume 34, issue 3, 1989, Pages 296~302
The mesocotyl elongation, having much effect on emergence and stand establishment in the direct sowing culture of rice, was investingated and summarized as follows: As to origin of cultivars, the average lengths of mesocotyl were 9.6 mm in the Indica-Japonica hybrid cultivars, 4.4 mm in the native cultivars and 3.2mm in the Japonica type, respectively. The mesocotyl lengths were tjereh, aman, aus, boro and bulu in order, with the mesocotyl lengths of 29.3mm and 5.4 mm in tjereh and bulu, respectively. The mesocotyl lengths were great in Baekkyungjo, Dadajo & Hejo among the native cultivars, in Sangpungbyeo, Paltal & Gokyangdo of the Japonica type and in Weonpungbyeo, Gayabyeo, Milyang 30 & Sujeongbyeo in Indica- Japonica hybrid cultivars, respectively. The mesocotyl length was the greatest at the seeds sampled I week after flowering (39. 3mm in length), and became decreased with the longer grain-filling. The mesocotyl elongated worse with the longer duration of seed storage regardless of seed maturity, and became longer at the 5
storage plot than at the 15 and 25
Effects of Herbicide Application on Growth and the Nodulation in Soybean
Jeong-Hae Oh ;
KOREAN JOURNAL OF CROP SCIENCE, volume 34, issue 3, 1989, Pages 303~309
Present study was conducted to reveal the effects of the herbicides, Lasso and Devrinol, on the soybean growth and the nodulation in field condition. Emergence rate was reduced positively in proportion to increase in the concentration of herbicides regardless of the herbicidal difference and it was significantly reduced even in the recommended concentration as compared to untreated plot, showing marked abnormal symptom on seedlings. Plant height, fresh weight of the plant, number of internodes, branches, pods, seeds per plant and 100-seed weight were reduced with increase in the concentration of herbicides and were highly significant in difference between the untreated plot and double concentration plot, eventhough most were nonsignificant in difference from the recommended concentration. Nodulation was significantly decreased with increase in the concentration of herbicides. The reduction was remarkably different with soybean varieties and consistently appeared from three weeks to six weeks after sawing. Significant correlation was realized between the reduction of nodulation and the agronomic characters of soybean and it was considered that the reduction of nodulation by misapplication of the herbicides might be a causal factor for decrease in soybean yield.
Studies on the Ripening Characteristics, Germination Speed and Quality among Different Floret of Japonica and Tongil Type of Rice under Different Growing Season
KOREAN JOURNAL OF CROP SCIENCE, volume 34, issue 3, 1989, Pages 310~323
This study was carried out to find out the difference of ripening and growth characteristics among the different florets in same panicle. There were 2 different transplanting date (May 25 and June 10) and 6 varieties were used. Physiological ripening period, ripening speed, 1000 grain weight, germination speed and grain quality were studied among the different florets (1, 5 and 8 days after heading) in same panicle. Physiological ripening period was long in late transplanting, late flowering floret, and late varieties by 3-9 days in Japonica. Ripening speed and 1000 grain weight were high in early transplanting and early flowering florets. There was positive correlation among the ripening speed, 1000 grain weight and a average temperature but negative correlation between the ripening and physiological ripening period. Germination speed was excellent in early flowering floret after heading. There was difference in amylose content within varieties and different flowering grains and there was significant correlation between grain quality and meteorological factors in some varieties.