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经1981—1986年不同耕法定位试验结果表明:两种不同土壤采用少(免)耕栽培水稻,与常规耕相比,砂壤土基本平产,黄粘土略有增产,而成本降低12％和17％,纯收入增加25％以上,经济效益明显。少(免)耕不翻乱土层,保持原状土壤养分T形垂直分布和稳态结构,有利于协调土壤肥力,促进水稻早发稳长。但杂草种子于表层富集,能否有效地控制杂草的发生和危害,是少(免)耕旱直播成败的关键。
The results of different tillage positioning tests from 1981 to 1986 showed that the two types of soils used less (tillage) cultivated rice than the conventional tillage, sandy loam basically flattened and yellow clay slightly increased while the cost was reduced by 12% 17%, net income increased by 25% or more, obvious economic benefits. Less (free) tillage does not overturn the soil, maintain the T shape vertical distribution of soil nutrients and steady-state structure, is conducive to coordinating soil fertility and promote rice early onset of stability. However, weed seeds in the surface enrichment, can effectively control the occurrence of weeds and hazards, is less (free) drought success or failure of live broadcast key.