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棉田因有机肥投入逐年减少,土壤有机质日趋下降,钾素和部分营养元素渐趋贫缺,棉花后期早衰面积逐年扩大。为探讨棉田培肥改土,增加有机肥投入的新途径,自1989年以来,我们先后对棉田覆盖大麦秸秆数量、方式及培土高度,覆盖后的改土、增产效应进行了试验研究。结果表明,棉田覆盖大麦秸秆后棉花具有前期早发、中期稳长、后期不衰、增产显著等优点。其中以每亩棉田覆草200公斤、培垄高17～
Due to the decrease of input of organic fertilizer in the cotton field, the soil organic matter decreased day by day, the potassium and some nutrients became increasingly scarce, and the area of premature aging in cotton increased year by year. In order to explore a new way for improving soil fertility and increasing input of organic fertilizer in cotton field, we have carried out experimental studies on the quantity and method of barley straw covering cotton fields, the height of cultivated soil and the effects of soil improvement and yield increase after covering in 1989. The results showed that the cotton with barley straw coverage after the early onset of early, mid-term stability, the latter does not decline, yield significant advantages. Among them, 200 kilos of grass per mu of cotton fields are cultivated, and the cultivation height is 17 ~ 17