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应用生态学报 ›› 1998, Vol. 9 ›› Issue (2): 150-154.

• 研究论文 • 上一篇    下一篇

免耕法对棉田生态系统能流功能的影响

戈峰, 谢宝瑜, 丁岩钦   

  1. 中国科学院动物研究所, 北京100080
  • 收稿日期:1996-03-19 修回日期:1996-12-09 出版日期:1998-03-25 发布日期:1998-03-25
  • 基金资助:

    国家自然科学基金(39670126);国际合作项目

Effect of no-tillage on energy flow in cotton agroecosystem

Ge Feng, Xie Baoyu, Ding Yanqin   

  1. Institute of Zoology, Academia Sinica, Beijing 100080
  • Received:1996-03-19 Revised:1996-12-09 Online:1998-03-25 Published:1998-03-25

摘要: 比较了常规与免耕法对棉田生态系统中土壤微生物、害虫、天敌、棉株及其整个棉田生态系统能流功能的影响.结果表明,免耕棉田土壤微生物量与年呼吸耗氧量均明显高于常规棉田,分别为常规棉田的1.32倍和1.63倍;免耕棉田的苗蚜与秋蚜、2代与4代棉铃虫种群生产力下降,而伏蚜与3代棉铃虫种群生产力增加;免耕棉田内天敌种群生产力及其捕食利用效率下降;免耕可提高棉田系统的光能利用率和总生产力,减少辅助能的投入,具有低耗、高效的特点.

关键词: 免耕, 棉田生态系统, 能流功能, GIS分析, 保护价值, 层次分析法, 熵权法, 国家湿地公园

Abstract: Comparative studies on the effect of conventional and no tillage methods on soil microbes, insect pests, natural enemies, cotton plants and energy flow in cotton agroecosystems show that the biomass and respiration rate of soil microbes were respectively 1.32 times and 1.63 times higher in no tillage than in conventional cotton agroecosystem. In no-tillage cotton agroecosystem, the productivity of seedling aphid (Aphis gossyppi), autumn aphid, 2nd and 4th generation cotton bollworm (Helicopavar armigera) populations was increased, but the productivity of summer aphid and 3rd generation cotton bollworm populations and the productivity and prey utilization efficiency of natural enemy populations were decreased. No-tillage could enhance the light utilization efficiency and gross production, with an additional benefit of reduced energy expense in cotton agroecosystem.

Key words: No-tillage, Cotton agroecosystems, Energy flow, national wetland park, analytic hierarchy process (AHP), protection value, entropy method, GIS analysis