간행물
한국작물학회지 KCI 등재 Korean Journal of Crop Science
- 발행기관 한국작물학회
- 자료유형 학술지
- 간기 계간
- ISSN 0252-9777 (Print)2287-8432 (Online)
- 수록기간 1963 ~ 2017
- 주제분류 농수해양 > 농학 농수해양 분류의 다른 간행물
- 십진분류KDC 524DDC 633
권호리스트/논문검색
제 61권 2호 (2016년 6월) 10건
1.
2016.06
서비스 종료(열람 제한)
The late-maturing black rice cultivar Shinnongheugchal from Jeollabuk-do Agricultural Research and Extension Service was used as the plant material for estimating growth characters, quality and yield from the vegetation period to harvest age. This study was performed to select an optimum combination of nitrogen level and planting density for the maximum yield of Shinnongheugchal. The plant height, number of tillers, and SPAD index were higher when the combination of 70 hills per 3.3 m 2 and 13 kg/10 a nitrogen level was used at 30 days after transplanting. The heading date for the combination of 70 hills per 3.3 m 2 and 15 kg/10 a nitrogen level, and 80 hills per 3.3 m 2 and 15 kg/10 a nitrogen level was August 22. The heading date for the other combinations was August 21. The combination of 70 hills per 3.3 m 2 and 13 kg/10 a nitrogen level yielded the highest number of tillers at 40 days after flowering. Even though the lodging index was increased with increasing nitrogen levels, field lodging did not occur until harvest time. Seed nitrogen concentration in the combination of 70 hills per 3.3 m 2 and 13 kg/10 a nitrogen level showed a significant difference when compared with the other combinations. The black rice yield varied significantly, and the highest yield was observed in the combination of 70 hills per 3.3 m 2 and 13 kg/10 a nitrogen level. The yield was significantly correlated with seed nitrogen concentration. The maximum yield was estimated to be 14.67 kg/10 a nitrogen level by using the regression equation. On average, the coloring degree of the black rice was higher at planting density of 70 hills per 3.3 m 2 than at 80 hills per 3.3 m 2 . The highest yield of perfect black rice was obtained using the combination of 70 hills per 3.3 m 2 and 13 kg/10 a nitrogen level. Our findings demonstrate that a nitrogen level of 13-14 kg/10 a can be used to obtain the maximum yield from Shinnongheugchal with yield, cyanidin 3-glucoside content, and perfect black rice yield as the standard.
2.
2016.06
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Recently, rice growth and production have been influenced by climatic change worldwide. In particular, under low solar radiation and cloudy weather, rice plants show abnormal physiological responses. In this experiment, plants of the rice cultivar Samgwangbyeo grown 40% and 70% shading and natural conditions at the primordium initiation stage (PI) for 30 days and the booting stage for 10 days up to heading were compared. After shading treatments, culm lengths were significnatly longer than that in natural condition plots, and panicle lengths were shorter in the 40% and 70% shading treatment plots compared to control plots. After heading, the production of dry matter treated at the PI stage was significantly lower than that at the booting stage. SPAD values of the leaf color and N concentration of leaves treated with shading were greater than those under natural conditions. In the shading treatment, the lodging index at 20 days after heading was significantly higher than that in natural condition. For yield components, number of panicles, spikelet number per panicle, and ripened grain ratio significantly decreased with shading treatment; thus, rice yield decreased significantly. For rice quality, the protein content of the head rice treated with shading was significantly higher than that in the control plot, but the amylose content of rice treated with shading was signifiantly lower than that in rice in control plots.
3.
2016.06
서비스 종료(열람 제한)
This experiment aimed to compare the sensory ability of experts and untrained to evaluate three rice varieties by using five sensory evaluation methods. All panelists showed significant differences in their sensory abilities to distinguish among Haiami, Chucheong, and Dasan 1 rice varieties when using the duo-trio test and triangle test. The expert panelists showed a clear preference in the following order: Haiami > Chucheong > Dasan 1, when using the paired comparison test, ranking test, and multiple comparison test. However, the untrained panelists showed no significant differences in their sensory ability to distinguish between the Haiami and Chucheong varieties when using the multiple comparison test. The results indicate that, for sensory evaluation of cooked rice by untrained panelists, the paired comparison test is suitable for evaluating two samples and the ranking test is suitable for evaluating more than two samples.
4.
2016.06
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The preaent study was conducted to investigate the effect of mixed seeding of three wheat variwties, ‘Anzunbaengimil’, ‘Jokyoung’, and ‘Sooan’, on agricultural characteristics and quality of plants to select the most suitable mixed seeding ratio. We observed that the yield of plants obtained from the mixed seeding combinations was higher than those obtained from single seeding of the three varieties. The yield was high, especially for the combinations ‘Sooan’ and ‘Anzunbaengimil’ (80 and 20%, respectively) and ‘Sooan’ and ‘Jokyoung’ (90 and 10%, respectively). The protein content of the seedlings obtained from the above two combinations was higher than in the seedling of ‘Sooan’. Based on our results, we suggest that mixed seeding of wheat varieties is more effective than single seeding in improving the yield and quality of plants obtained from mixed seeding.
5.
2016.06
서비스 종료(열람 제한)
Hyeon Jin Park, Won-Young Han, Ki-Won Oh, Sang-Ouk Shin, Byong Won Lee, Jong-Min Ko, In Youl Baek, Hang Won Kang
A double-cropping system with soybean (Glycine max) following the cultivation of potato, garlic, and onion is widely adopted in the southern region of Korea. For this system, marginal dates for planting must be determined for profitable soybean yields, because the decision to plant soybean as a second crop is occasionally delayed by harvest of the first crop and weather conditions. In order to investigate the effect of planting date on soybean yield, three cultivars (early and late maturity) were planted on seven different dates from May 1 to July 30 in both paddy and upland fields across 2012 and 2013. Soybean yields were significantly different among the planting dates and the cultivars; however, the interaction between cultivar and planting date was not significant. Based on linear regression, the maximum yield of soybean was reached with a June 10 planting date, with a sharp decline in yield for crops planted after this date. The results of this study were consistent with those of a previous one that recommends early and mid-June as the optimum planting period. Regardless of soybean ecotype, a reduction in yield of greater than 20% occurred when soybean was planted after mid-July. Frost during soybean growth can reduce yields, and the late maturity cultivars planted on July 30 were damaged by frost before completing maturation and harvest; however, early maturity cultivars were safely harvested. For sufficient time to develop and reach profitable yields, the planting of soybean before mid-July is recommended.
6.
2016.06
서비스 종료(열람 제한)
This experiment was conducted to identify the variations in inorganic nutrients and plant growth in millet (Panicum miliaceum L.) due to soil salinity. The soil series was Munpo and soil texture was silt loam. The experimental soil was amended so that the soil had salinities of 0.8 dS m-1, 1.6 dS m-1, 3.2 dS m-1 and 4.8 dS m-1. Millet was transplanted 15 days after sowing. As soil salinity increased, the degree of reduced growth was in the order of seed production > root dry matter > plant dry matter > culm length > tiller number > stem thickness > Panicle length. Seed production was decreased to 18.9% in soil salinity of 1.6 dS m-1, 36.9% in of 3.2 dS m-1, and 50.7% in EC of 4.8 dS m-1. Root dry matter decreased to 35.8% in EC of 3.2 dS m-1, and to 40.5% in EC of 4.8 dS m-1. As soil salinity increased, Total nitrogen content increased in all aboveground parts, roots and seeds. However, There was no difference in CaO, P2O5, K2O and, MgO in soils of different salinity. On the other hand, Na2O content was higher in the order roots> shoots> seed, and in the case of roots, Na2O content increased to 1.02% in soil salinity of 4.8 dS m-1. However, up to soil salinity of 1.6 dS m-1, the Na2O content of the seed was similar to that in plant grown in the Control conditions(0.8 dS m-1). In conclusion, taking into consideration economic factors, millet could be cultivated in soil with salinities of up to approximately 1.6 dS m-1, and seed produced from reclaimedland would be suitable for human consumption.
7.
2016.06
서비스 종료(열람 제한)
This study was conducted to evaluate the effect of plant number per hill (PNH) on growth and yield of foxtail millet in drained paddy fields. Crop growth, development, and yield in the field were examined for 2 years to assess the efficiency of proposed cropping system. The greatest culm length of 138 and 148 cm in the first and the second year, respectively, at the harvest stage was observed in plots with one plant per hill. The greatest culm diameter of 7.79 and 7.67 mm in the first and second year, respectively, was measured in plots with one plant per hill. The greatest tiller number of foxtail millet in plots with one plant per hill was 2.9 and 2.7 in the first and the second year, respectively. However, there was no significant difference between plots with four and five plant per hill. Among the measured yield components, the spike length and seed number per spike were one plant per hill in both years. The highest grain yield of foxtail millet (324 kg ․ 10a -1 and 333 kg ․ 10a -1 in the first and second year, respectively) was obtained from plots with two plants por hill, followed by plots one, three, four, and five plants per hill.
8.
2016.06
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In this study, agronomic characteristics and fatty acid composition of 121 flax (Linum usitatissimum L.) germplasms were analyzed. The flax germplasms had a fairly short growth period of 75-95 days. The plant height at maturity varied from 52 to 124 cm. The flower color varied from white to lilac and even purple. Early flowering flax germplasms had white flowers and were resistant to lodging. In early flowering flax germplasms, all agronomic characteristics, including growth period, plant height, branch number per plant, stem diameter, number of capsules per raceme, seed number per capsule, 1000-seed weight, and seed yield, were decreased. The average fatty acid composition of 121 flax germplasms comprised palmitic acid (5.3%), stearic acid (4.3%), oleic acid (29.7%), linoleic acid (13.1%) and linolenic acid (46.4%). The total content of unsaturated fatty acids ranged from 84~94% with an average of 88%. Among the fatty acids, linolenic acid (omega-3) content was the highest with a range of 36~54%. In five selected flax germplasms (Hollandia 1803, Red son, C & F Res Br 1767, Wiera, and Ireland 1657) with high linolenic acid (≥51%), total lipid and protein contents were 30~36% and 5.4~6.9%, respectively. Overall, flax can practically be adoptable into cropping systems in South Korea and utilized as a scenery crop, since flax has a short cultivation period with diverse flower colors.
9.
2016.06
서비스 종료(열람 제한)
This study was conducted to investigate the effects of temperature and shade, which are basic environmental conditions, on growth, yield, inorganic components, and general components of Codonopsis lanceolata, in order to obtain basic data for improving yield capacity. In natural light, in the 15, 20, and 25°C groups, the plant heights ranged between 218.9 cm and 223.9 cm, and there was no significant difference between groups. However, the leaf size was larger in shade, and the leaf area was significantly larger in the 15 and 30°C groups. In natural light, root length and diameter were shorter and thinner when the temperature was higher, and growth was highly suppressed at 30°C. With regards to macroelements, the contents of Na, Mg, and P increased as temperature increased, regardless of the plant part; however, no constant tendency was observed in K and Ca according to temperature. The contents of Mg and Ca (from highest to lowest) were in the order leaf>stem>root, whereas the contents of Na, P, and K were in the order stem>leaf>root. Contents of general components varied according to temperature, and were highest at 30°C. While the plant height was increased under the constant 25°C +DIF (Difference between day and night temperature) condition, growth was suppressed in the –DIF group, in which the night temperature was higher than the day temperature, which suggests that a change in night temperature is one of the factors that affects the growth of C. lanceolata. As in the growth of the above-ground parts, fresh weight of the root was high in the constant 25°C group and +DIF group. Notably, it was more than 2.5 times the fresh weights in the constant 15°C group, constant 20°C group, and –15 DIF group.
10.
2016.06
서비스 종료(열람 제한)
Comparison of Morpho-physiological Characteristics in Diploid and Tetraploid Platycodon grandiflorum
Soo-Jeong Kwon, Hee-Doo Lee, Dong-Yeon Seo, Young-Ja Moon, Gab-Yeon Cho, Hee-Ock Boo, Sun-Hee Woo, Hag-Hyun Kim
The present study was performed to compare the morpho-physiological characteristics of the tetraploid and diploid varieties of Platycodon grandiflorum and to obtain basic data for cultivating a tetraploid variety with high yield and content of functional substances. The plant height of the tetraploid variety (54.0 cm) was slightly higher than that of the diploid variety. The leaf length and width of the tetraploid variety were 10.2 cm and 7.3 cm, respectively. The results obtained from the present study revealed that the form of the leaf changed from lanceolate to ovate, and the chlorophyll content in the tetraploid variety (16.7) was slightly higher than that in the diploid variety. The photosynthetic rate significantly increased (24%) to 13.4 μmol CO2·m -2 ·s -1 in the tetraploid variety from that of the diploid variety. The pollen viability of the tetraploid variety was decreased by approximately 33% with respect to that of the diploid variety, but this did not have a significant adverse effect on seed production. The fresh weight of tetraploid P. grandiflorum was 49.4 g, which was approximately 44% higher than that of the diploid variety.
