连作大豆减产的生理生化机制  

The Physiological and Biochemical Mechanism of the Yield Reduction of Continuous Soybean Cropping

作　　者：郑桂萍[1] 侯雪琪[1] 孙长艳[1] 

机构地区：[1]黑龙江八一农垦大学农学系,黑龙江省佳木斯市农业科学院情报所

出　　处：《黑龙江农业科学》1995年第5期11-14,共4页Heilongjiang Agricultural Sciences

摘　　要：本文探讨了连作大豆减产的生理生化机制。试验表明，连作大豆水分胁迫严重；内源激素ＧＡ３（赤霉素）、ＩＡＡ（吲哚乙酸）、ＡＢＡ（脯氨酸）、ＺＲ３（玉米素）含量变化，它们共同作用的结果抑制了植株的生长发育，尤其对冠部生长不利；连作大豆营养偏耗，根际土及植株中某些元素亏缺，尤以钾亏缺严重；根系活力下降，叶质重降低。以上各种因素共同作用的结果致使连作大豆干物质生产减少，产量降低达显著和极显著水平。This peper studied on physiological and biochemical Mechanism of the yield reduction in continuous soybean cropping. The results showed there was serous water stress in continuous soybean cropping and the change of endogenous hormone content (GA3 .LAA, ABA .ZRs) inhibited growth of soybean, especially shoot and certain elements, especially k, showed lack in soybean and rhizosphere soil and root activity descend and speeific leaf weight was reduced. Such comprehensive factors hintred soybean growth and resulted yield reduction.

关 键 词：大豆 连作 生理生化 产量 

分 类 号：S565.101[农业科学—作物学]