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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 30, Issue 4 - Dec 1985
Volume 30, Issue 3 - Oct 1985
Volume 30, Issue 2 - Jul 1985
Volume 30, Issue 1 - Apr 1985
Selecting the target year
Labor-saving Feasibilities in Transplanting of Paddy Rice III. Intepretation of Interactions between Transplanting Density and Fertilizer Application in Paddy Rice
KOREAN JOURNAL OF CROP SCIENCE, volume 30, issue 3, 1985, Pages 217~222
The yield responses of three isogenic lines in plant type of paddy rice(open-, spread- and broom-type) as affected by combined treatments of transplanting densities (47.62, 22.22, 15.15, 11.11 and 8.33 hills per sq. meter) and rates of fertilizer application (0, 0.5, 1.0 and 1.5 folds of standard rate) were studied by using of the partial differentiations by planting density(D):df(D,F)/dD, fertilizer rate(F):df(D,F)/dF, and their interaction(DXF):d
f(D,F)/dDdF from the multiple regression polynominal equations. Under the condition of wider planting, the broom-type showed most prominent and sensitive responses in yield among others. Also the action of transplanting density in the broom-type were positive both at lower and higher densities. Under the lower densities, the broom-type represented positive actions both at lower and higher rates of fertilizer application. Whereas the interactions between the density and fertilizer rate under the lower densities were rather negative. To achieve the labor-saving by lower transplanting density(11-14 hills per sq. meter), the amount of fertilizer rates were estimated as 1.3-1.5 folds much of the standard in the open-type, whereas more than 1.5 folds in the broom-type. Thus, the potentials to absorb more amounts of fertilizer may explain the compensating function of the broom-type for equivalent yields of the standards at reduced transplanting densities.
Thermal Inhibition to Photosynthesis of Ginseng and Tobacco Plants
KOREAN JOURNAL OF CROP SCIENCE, volume 30, issue 3, 1985, Pages 223~228
Photosynthetic inhibition to temperature were conducted with ginseng(4 year old) and tobacco(var. Bulgaria). The plants were kept under various temperature conditions from 1
/sec for 3 and 6hrs, and net
uptake were measured after 2hrs at
. Photosynthetic optimal leaf temperature of ginseng was 21
and tobacco was
. Stomatal resistance and mesophyll resistance increased at high temperature. Especially, stomatal resistance seemed to have a significant role in determining the temperature responses of photosynthesis. In tobacco photosynthetic capacity was not changed by temperature treatment for 3hrs. However, 6hrs exposure reduced 8% of net photosynthesis at 4
and 12% at 1
. Ginseng plants exposed for 6hrs at 4
lost photosynthetic capacity by 83%. Temperature responses of ginseng were very sensitive at above-optimum temperature resulting greater thermal inhibition other than photoinhibition.
Zoning of Agroclimatic Regions Based on Climatic Characteristics During the Rice Planting Period
KOREAN JOURNAL OF CROP SCIENCE, volume 30, issue 3, 1985, Pages 229~235
Zoning of the agroclimatic regions was attempted based on the distribution of drought index, effective temperature, meteorological factors and their standard deviation and a climatic productivity derived from yield response of rice to temperature and sunshine hours. The meteorological data obtained from synoptic weather stations under the Central Meteorology Office and simple weather observatories under the Rural Development Administration at 155 locations throughout the country were computerized in the PDP11/70, RDA Computer Center, to analyze the climatic similarities among the locations, except the Jeju Island. The nineteen different agroclimatic regions were classified, ego the Taebaeg Mountainous Region. the Charyung Southern Plain Region, etc., and the climatic characteristics of the regions were identified.
Studies on Physiological Action of Ethylene in Rice Plant Ⅶ. Varietal Differences of Ethylene Evolution and Biosynthesis of Rice Seedling
Moon-Hee Lee ; Yasuo, Ota ;
KOREAN JOURNAL OF CROP SCIENCE, volume 30, issue 3, 1985, Pages 236~244
To know the varietal differences of ethylene evolution, 55 rice varieties were tested at seedling stage. And, also, 6 rice varieties were tested the biosynthesis of ethylene production. The group of japonica varieties produced higher amount of ethylene than the indica and indica x japonica crossed varieties. The content of ACC in rice seedlings of japonica varieties was higher than in seedlings of indica and indica x japonica varieties. And, also, the conversion rate of mathionine and ACC to ethylene in seedling of japonica varieties was higher than in seedling of indica and indica x japonica varieties.
Effects of Seed Size and Cotyledon Removal on Germination and Yields in Peanuts
Jung-Il Lee ;
KOREAN JOURNAL OF CROP SCIENCE, volume 30, issue 3, 1985, Pages 245~251
Distributions of seed weight were investigated with different seed sized peanut varieties planted at the same time, and germination and field emergence percentage, growth, and seed yield were compared among three seed sizes of four peanut genotypes. Field performance also was carried out to evaluate the effects of cotyledon removal on growth and yields in field with large and small seed-sized peanut varieties. The variation of seed weight of large seed-sized was wider than small seed-sized peanut variety. The larger seed showed the higher percent germination after 3 days cold treatment in laboratary and field emergence. The growth was not different with their sizes, while seed yield was related to seed size in small seed-sized genotypes. The growth of peanut such as main stem, internodes, and total branches was affected significantly by cotyledon removal, although the differences were not obvious after podding time, and in small seed-sized variety Oltangkong, the yields was decreased by cotyledon removal but not in large seed-sized variety.
Competitive Response of Rice Cultivar in Association with Plant Spacing and Seedling Number per Hill
Soon-Chul Kim ;
KOREAN JOURNAL OF CROP SCIENCE, volume 30, issue 3, 1985, Pages 252~258
An experiment was conducted at the Yeongnam Crop Experiment Station to obtain basic informations about cultural techniques for high yielding by manipulating plant spacing using two rice cultivars, Samgangbyeo (Indica/Japonica type) and Nakdongbyeo (Japonica type), and four plant spacings, 10
30cm and 40
40cm, with 4 kinds of seedling number per hill, 1,3,5 and 7, respectively. High photosynthetic efficiency (Eu) exhibited at the Samgangbyeo compared to Nakdongbyeo regardless of plant spacings and seedling numbers. For Samgangbyeo, Eu value was the highest at the 20
20cm plant spacing and five seedlings and seven seedlings per hill showed high Eu values at 10
10cm plant spacing and 20
20cm plant spacing, respectively, while other plant spacings were not significantly differed among seedling numbers. For Nakdongbyeo, however, one seedling plot obtained high Eu value at the 10
10cm plant spacing while this Eu value increased as the seedling number per hill increased in other plant spacings. There was a high positive correlation between rice grain yield and total competition index for both cultivars while kind of relationships differed in these two cultivars; linear relationship for Samgangbyeo and exponential relationship for Nakdongbyeo, respectively. Competition index between rice hill was more significant than within rice hill for Samgangbyeo while both competition indexs were important for Nakdongbyeo to increase rice yield.
Biological Yielding Potential of Rice in Association with Climatic Factors in Yeongnam Region
Soon-Chul Kim ;
KOREAN JOURNAL OF CROP SCIENCE, volume 30, issue 3, 1985, Pages 259~270
Meteorological year variations for rice crop from 1973 to 1984 were compared by using air temperature and sunshine hour for nursery period, cooling index for reproductive stage and meteorological yield productivity index for ripening period. The most optimum transplanting date and heading date for crop yield based on real transplanting date-grain yield relationship or heading date-grain yield relationship, meteorological yield productivity index and actual results showed good agreement each other. Around May 26 for transplanting and August 10 for heading were the most optimum date in Indica/Japonica hybrid cultivars while these were about June 8 and August 23 for Japonica cultivars, respectively. On the other hand, theoretical late limiting heading date for safe ripening were August 20 for Indica/Japonica hybrid cultivars and August 30 for Japonica cultivars, respectively, for both methods, cumulative temperature method during ripening with 80% believable frequency and meteorological yield productive index method having 1000(kg/10a) yielding potential. Based on the yield forecast trial, the highest values of photosynthetic efficiency, 2.5%, and crop growth rate, 23g/㎡/day, were recorded during 30 days before rice heading. Considering the photosynthetic efficiency and solar radiation, the potential crop growth rate was more or less 30g/㎡/day and the biological grain yielding potential in a existing cultural practices was approximately 900-1000(kg/10a) in Milyang weather condition. To increase further yielding potential, either photosynthetic efficiency or harvest index or both should be improved by manipulating appropriate canopy architecture, plant spacing, fertilizer, chemical, etc.
Effects of Media and its Components on Callus Induction and Plant Differentiation in Rice Anther Culture
KOREAN JOURNAL OF CROP SCIENCE, volume 30, issue 3, 1985, Pages 271~276
Effects of media and its components on callus induction and plant regeneration were studied to increase the cultural efficiency in rice anther culture. The N
basic medium gave better results in callus induction than those of MS or Miller. The medium used for callus induction affects the plant regeneration. The frequency of plant regeneration from callus grown on Miller basic medium was lower than those of N
or MS. Most of calli derived from anthers, above 90%, were induced from 20 days to 40 days after anther inoculation. The cultural efficiency of modified N
basic medium which was composed of 31.5mM KNO
as nitrogen sources was higher than those of N
basic medium. Combination of NAA and Kinetin showed better results than that of 2, 4-D only in cultural efficiency. Effect of DL-alanine on callus induction in Indica variety, IR40, showed better response in the anthers pretreated for 6 days at 12
Silage Yield of Korean Local Maize Lines(MET) with Many Tillers and Ears
KOREAN JOURNAL OF CROP SCIENCE, volume 30, issue 3, 1985, Pages 277~286
From a series of studies conducted on the local maize lines at the Agr. College of the Chungnam National Univ., a few maize lines with many tillers and ears per plant were identified and tentatively named as MET. The purpose of the study was to evaluate the MET lines, which were selfed for five generations, for silage purpose under the different plant densities. A hybrid, Suwon #19 and a synthetic variety, Puyo #3
#2, were included for comparison. Plant height at harvesting times showed no significant varietal differences. However, the MET lines were very slow in early plant growth compared to the hybrid or synthetic variety, probably due to inbreeding depression of the MET lines. Total fresh weight at the harvesting times was highest in the MET 1 line. The MET 1 line was about 2,000 kgr. per 10a. higher than the hybrid at the harvesting time. The highest fresh weight was obtained when grown under the plant density of 60
20cm. Total dry weight per unit area showed the same tendency as the fresh weight. Total dry weight of MET 1 line was about 2.4 tons per 10a., which was about 10% higher than the hybrid, Suwon #19. As the fresh weight, the total dry weight was also highest in the plant density of 60
20cm. The grain yield per 10 are of MET 1 was comparable to the grain yield of the hybrid, especially in the low plant density, 60
40cm. The average number of effective tillers of MET lines were 4.5, while the mean tiller number of the hybrid or synthetic variety were none. However, the lodging was one of the problem for growing MET lines. The 100 kernel weight of MET lines was about 9 gr., while the 100 kernel weight of the hybrid or synthetic variety was about 30 grm.
Studies on the Inheritance of Quantitative Characters in Rice Ⅵ. Differences of Degree of Heterosis and Gene Distributions for Several Agronomic Characters of Rice in 9-parent Diallel Cross
Kwon-Yawl Chang ; Soo-Yeon Cho ;
KOREAN JOURNAL OF CROP SCIENCE, volume 30, issue 3, 1985, Pages 287~293
Degree of heterosis and gene distributions of several agronomic characters of rice were studied with F
generations of 9-parent partial diallel cross in 1983-1984. Degree of heterosis was greater in F
hybrids than F
hybrids for culm length, panicle length and number of panicle and the heterobeltiosis could be observed in culm length and number of panicle from several crosses. Incomplete dominance was exhibited by culm length, panicle length and number of panicle in F
Variations of Root and Shoot Characteristics of Barley Cultivars in Different Environmental Condition
KOREAN JOURNAL OF CROP SCIENCE, volume 30, issue 3, 1985, Pages 294~300
This experiment was carried out to study the root and the other major agronomic traits of barley cultivars at the greenhouse and natural conditions for the accelerating of breeding generation. The barley cultivars tested in this experiment were Kangbori, Olbori and Suwon 18. In early stages, total dry weight of barley was vigorously increased at the greenhouse condition, whereas it was less increased than that of natural condition after heading stages. In dry root weight, it was decreased at natural condition rather than greenhouse condition. The appearance of harvest dry root weight was at four weeks after heading at natural condition and seven weeks after heading at greenhouse condition, respectively. It showed different tendency in T/R ratio, indicating the continuous increased at natural and greenhouse condition, even if there is more or less decrease until tillering stage at greenhouse condition.
Forage and TDN Yield of Several Winter Crops at Different Clipping Date
Kyu-Yong Chung ;
KOREAN JOURNAL OF CROP SCIENCE, volume 30, issue 3, 1985, Pages 301~309
This experiment was conducted to know a substantial body of information about the differences of the important forage characteristics; green fodder yield, dry matter yield, TDN%, TDN yield and so forth of the seven cultivars selected as the forage crops (Rye, Triticale, Wheat and Barley) depending on the specific times of cutting stage, on the Wheat and Barley Research Institute from October, 1983 to June, 1984, and the results summarized as follows. Green fodder yield & dry matter weight, when clipped at 20, 30 April and 10 May, of varieties Homil #2 showed the most yielding capacity, but when clipped at 20 May, Suweon#8 (triticale) showed the most green fodder yield whereas Homil #1 the most significant dry matter weight. Plant height, in the cases of Paldanghomil, Homil #1 & Homil #2, showed distinctly longer than that of Bunong, Suweon #8 & Suweon #9 and continued to grow even after the heading date. Dry matter ratio increased with time (Dry matter yield/green fodder yield x100). TDN % decreased but TDN yield increased with time but Homil #1, Homil #2 and Paldanghomil showed relatively the higher values. In the elements of nutrient of cell wall, Suweon #8 & Bungong among 7 cultivars have good quality. The reasonable clipping date of wheat &barley as green fodder crops are 10 May to 20 May, but if clipped before 10 May and 20 May, Homil #2 and Suweon #8 became the promising forage crops, respectively.
Study on the Meteorological Effect on the Yield of Ginseng Seedling
Jong-Chul Lee ;
KOREAN JOURNAL OF CROP SCIENCE, volume 30, issue 3, 1985, Pages 310~313
Seven years data on the yield of ginseng seedling were investigated to define the relations between meteorological conditions and yield of ginseng seedling. Variation of meteorological factors by years are showed in the order precipitation, hours of sunshine and temperature. The variation of temperature by years was biggest in June, whereas smallest figure in April. Variation of yield of ginseng seedling in different quality by years was biggest in number of short weighted seedling and least in that of usable seedling. Highly significant correlations were confirmed between number of usable seedling and number of total seedling, and between number of total seedling and precipitation from January to March, respectively. A significant negative correlation was recognized between the number of usable seedling and temperature in July but correlation between number of usable seedling and precipitation in May was positive. It suggests that water management in seedbed have to be started from May.
Varietal Difference of Some Traits Related to Earliness under Different Daylength in Barley
Eun-Sup Lee ;
KOREAN JOURNAL OF CROP SCIENCE, volume 30, issue 3, 1985, Pages 314~319
In order to observe the differences of several characters related to earliness, seven barley varieties were tested under two different photoperiodic conditions. Final leaf number per main stem under long day did not vary among varieties, but ranged 6 to 7 in early group and 9 to 10 in late group under shortday. Shoot apex of early varieties, Jogangbori and Oweolbori reached to X stage at 24 days, but that of late variety, CI 15446 did to X stag at 32 days after transplanting under short day. Spike length reached to maximum length at 39 days in early group, but at 51 days in late group. Saeolbori, CI 15446 and Hangmi were photo-sensitive, but Jogangbori and Oweolbori were photo-insensitive. Therefore, the photoperiodic response to short day was most responsible to heading time. Those results showed that early heading varieties had the characteristics with less variation of final leaves, less retardation of shoot apex development and spike elongation, and shorter period to flag leaf emergence under short day.
Interrelationship between Amylose Content and Physical Properties of Milled Rice
KOREAN JOURNAL OF CROP SCIENCE, volume 30, issue 3, 1985, Pages 320~325
Relation between amylose and physical properties of milled rice was investigated. Amylose content was negatively and positively correlated with chalkiness and alkali solubility, respectively. No correlation was observed between amylose content and water uptake rate, cooked rice hardness or relative crystallinity. Relative crystallinity of the starch was negatively correlated with alkali solubility and water uptake rate.
Genetic Variabilities in Two Modified Opaque-2 Synthetics of Corn(Zea mays L.)
Yun Gyu, Kang ; Keun Yong, Park ; Bong Ho, Choe ;
KOREAN JOURNAL OF CROP SCIENCE, volume 30, issue 3, 1985, Pages 326~333
The genetic information was required to improve several plant characteristics of the two modified opaque-2 synthetics, which were synthesized in 1980 at the Chungnam National University. Genetic analysis to obtain the information was carried out by the method of Hallauer and Wright. The information obtained from the analysis indicates that plant characteristics such as plant height, ear height, kernel weight and yield of the two synthetics can be improved by proper breeding procedures, since these characteristics were showing high estimates of genetic and additive variance. The study also shows that some characteristics such as ear length or kernel row number may be not improved effectively and with ease.
Effects of Polyethylene Mulch and Levels and Placements of Nitrogen on Soil Properties and Sweet Corn Growth
KOREAN JOURNAL OF CROP SCIENCE, volume 30, issue 3, 1985, Pages 334~339
A sweet corn hybrid, Honey Bantam, was planted on 24 May, 1984 in a silty clay loam soil to investigate the effects of polyethylene(P.E.) mulch and different levels and placements of Nitrogen(N) on soil properties and sweet corn growth. A split-split plot design with three replications was employed; P.E. mulch and bare soil were main plot, N levele of 8, 12, 16, and 20 kg/10a were subplot, and band and broadcast of fertilizers were sub-subplots. At early growth stage soil temperature under P.E. mulch was higher than that in bare soil by 5-10
, but the differences decreased as plant growth advanced. Soil hardness increased with soil depth while P.E. mulch reduced soil hardness probably by holding high soil moisture. Soil pH decreased up to the 6th week after planting and then increased in bare soil, but it contineously decreased up to the 8th weeks under P.E. mulch regardless N levels and placements. Electrical conductivity(EC) of soil increased up to the 6th weeks after planting and then decreased in all treatments except broadcast of fertilizers under P.E. mulch where EC increased contineously. Generally, soil EC under P.E. mulch was higher than that in broadcast. Broadcast of fertilizers did not affect emergence of seedlings in all N levels under P.E. mulch and bare soil, but band of fertilizers at all N levels under P.E. mulch and higher levels of N in bare soil reduced emergence rate significantly. Percent stand was possitively correlated with soil EC and it strongly influenced the number of marketable ears. Plant growth was enhanced and silking date was earlier by 14-19 days under P.E. mulch compared to bare soil probably due to increased soil moisture, reduced soil hardness and higher soil temperature.
Effect of Sowing Dates, Fertilizer Levels and Clipping Treatment on Forage Production and Quality of Barley(Hordeum vulgare L.) and Rye(Secale cereale L.) in Paddy field
KOREAN JOURNAL OF CROP SCIENCE, volume 30, issue 3, 1985, Pages 340~346
Field experiments were carried out to investigate the effects of sowing dates, ferrilizer levels and clipping treatment of forage production and quality of barley and rye in paddy field. The field emergence rates in barley varieties was decreased rapidly at sowing after November. But in rye varieties, it was not decreased even in sowing until Nov. 3. Winter survival of barley and rye varieties were not affected by fertilizer levels. And winter survival decreased with delay in sowing dates in barley varieties, but, it was not influenced by sowing dates in rye varieties. The production of forage dry matter at heading stage was increased with fertilizer levels, and was decreased with delay in sowing dates. Content of crude protein and crude fat of dry forage at heading stage were increased with fertilizer levels. But, content of crude ash, crude fiber and TDN were not influenced by fertilizer levels. As increased fertilizer levels, NFE Content was decreased and TDN yield was increased with fertilizer levels. In comparisons of TDN yield between barley and rye varieties, TDN yield of rye were superior to those of barley. Clipping twice produced more forage yield than clipping once in both crops. However, optimum clipping interval was about 40 days between first and second clipping in rye but not determined in barley. The l2cm clipping height was the highest production in average total yield.