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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 .
The effects of conventional and no tillage methods on the energy flow of soil microorganisms, pests, natural enemies, cotton plants and their entire cotton ecosystem in cotton field were compared.The results showed that soil microbial biomass and annual respiratory oxygen consumption were significantly higher in no-tillage cotton fields Which was 1.32 times and 1.63 times higher than that of the conventional cotton fields respectively. The productivity of the population of seedling aphids and aphids, cotton bollworm 2 and 4 were decreased in no-till cotton fields, Productivity increased; the productivity of natural enemies in no-till cotton fields and their predation and utilization efficiency decreased; no-tillage could improve the light energy utilization rate and total productivity of cotton field systems and reduce the input of auxiliary energy, which has the characteristics of low consumption and high efficiency.