| 摘要: |
| 在黄淮海平原北部地区较高水肥条件下,一年两熟比一年一熟具有较高的生产力。经济产量、热能量、蛋白质含量等约增加77—101%。同时提高了经济效益与能量产投比。一年两熟制从土壤中取走的无机养分较多,但有机质源也成倍增加。根据生产力形成因素分析结果,在低生产水平或生长季较短的地方,应主攻叶面积,不要过高地提高复种指数。但在高生产水平而热量又允许的地方,实行适宜的多熟制是增加产量发展多种作物的重要途径。 |
| 关键词: 冬小麦 复种指数 光能利用率 一年两熟 经济效益 经济产量 生产力 有机质平衡 春玉米 种植方式 |
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| 基金项目: |
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| A COMPARATIVE STUDY OF CROP PRODUCTIVITY BETWEEN MONOCULTURE AND DOUBLE CROPPING |
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| Abstract: |
| In the regions of Huang-Huei-Hei plain under irrigation,comparing with monoculture double cropping can raise higher produdtivity.The economical yeilds,biological yields,total energy and protein production of double cropping would be 77-101% higher than those of monoculture. Moreever,the economical efficiency and the ratio of energy output against inpt increased significantly.The crops in double cropping remove more mineral nutrients from the soil,meanwhile add in much more organic matters. According to the ... |
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