| 连作大豆根冠比增大原因的研究 |
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| 引用本文： | 王晶英 张红燕. 连作大豆根冠比增大原因的研究[J]. 大豆科学, 1997, 16(2): 136-142 |
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| 作者姓名： | 王晶英 张红燕 |
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| 作者单位： | [1]黑龙江八一农垦大学农学系 [2]黑龙江省农业机械化学校 |
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| 摘 要： | 通过对轮、连作大豆干物质积累量的定期测定，发现连作大豆根、冠干物质积累量均低于轮作，根冠比（Ｒ／Ｓ，干重比）增大。这主要是由于连作大豆根系病虫害加重，磷、钾等元素亏缺，水分胁迫较重，内源生长素（ＩＡＡ）、赤霉素（ＧＡ３）、玉米素核苷（ＺＲｓ）、脱落酸（ＡＢＡ）的含量及比例变化导致冠部降低幅度大于根系，最终使根冠比增大。
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| 关 键 词： | 大豆 连作 根冠比 |
STUDY ON THE REASON OF ROOT SHOOT RATIO INCREASING OF SOYBEAN ON CONTINUOUS CROPPING |
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| Abstract: | By regular observation we found that amount of dry matter accumulation of soybean (root and shoot), especially shoot, under continuous cropping was lower than that under rotation. In addion, disease and insect damage of root became more serious and certain element(P,K) showed lacking, and water stress became serious and content and proportion of endogenous hourmone(IAA, GA 3,ZRs,ABA) changed under continuous cropping. Such comprehensive factors caused the decrease of dry matter accumulation of shoot more than that of root and finally caused root shoot ratio increased. |
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| Keywords: | Soybean Continuous cropping Root shoot ratio |
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