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低溫과 水分포텐셜이 紫雲英 蒐集種의 發芽와 苗伸長에 미치는 影響
Rak Chun Seong(成樂春),Keun Yong Park(朴根龍),Jae Yeung Cho(趙載英) 한국육종학회 1990 한국육종학회지 Vol.22 No.3
Germination and seedling growth of local collected chinese milkvetch (Astragalus sinicus L.) cultivars were measured at three temperatures (5, 10 and 15℃) and four polyethylene glycol(PEG) 10,000(MW) solutions(0, 10, 20 and 25g/100㎖ H₂O). Adjustments of PEG 10,000 solutions were based on water potentials of 0.0, -0.2, -0.5 and -0.8 MPa at room temperature. Observations were taken at 5, 7, 9 and 11 days for treatments at 15℃, 7, 11, 15 and 19 days for those at 10℃, and 9, 15, 21 and 27 days at 5℃. Germination rate of cultivar A of chinese milkvetch was higher than that of cultivars B at three temperatures and four PEG treatments. However, cultivar B showed greater seedling length than cultivar A at the temperatures and PEG treatments. The highest germination rate and seedling length of both cultivars were appeared at temperature of 10℃ among three temperatures. Germination rate and seedling length of both cultivars were reduced as PEG concentration increased from PEG 10 to 25g/100㎖ water. With concentration of PEG 20 and 25g/100㎖ water, germination rate and seedling length of both cultivars were the highest at 101C. Germination rate and seedling length of both cultivars of the cultivars was increased as temperature increased. The result of this study indicated that germination of chinese milkvetch seeds was affected more by moisture stress conditions than by low temperatures and required more moisture for adequate germination and seedling growth.
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신개지(新開地)에 있어서의 대두증수(大豆增收) 요인분석애 관한 연구
맹도원,조재영 한국농화학회 1974 Applied Biological Chemistry (Appl Biol Chem) Vol.17 No.1
This study was conducted to determine the effects of soybean cultivation on yield and other characters in a newly reclaimed soil. Four factors - ① plant density ② compost application ③ innoculation of nodule bacteria (Rhizobium japonicum) combined with lime application ④ NPK application-were examined in a 24 factorial experiments arranged in randomized complete block design with 4 replicates. Kangio variety was used and the results obtained are summarized as follows; (1) Dense plant population, Application of Compost and application of fertilizer (NPK) gave the yields 1.7, 1.4 and 2.1 times the check respectively. The Combinations of, dense population×compost, dense population×fertilizer (NPK), compost×fertilizer(NPK), and dense population×compost×nodule bacteria with lime×fertilizer (NPK) increased the yields by 2.0, 3.0, 2.6 and 5.4 times than the check respectively. But little effect on yield was noted in the treatment inoculated with nodule bacteria with lime. (2) In the case of higher yield, the increased weight of 100 seeds was found. (3) A markedly increased PH was observed in all of the plots under study after the. completion of experiment. (4) The compost treatment and the ferttilizer (NPK) treatment greatly increased the organic matter, total nitrogen and the available phosphorus in the soil. (5) The variation in the grain yield appeared to have a close correlation with the content of available P₂O_5 in the soil.
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