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通过对棉田不同覆草量、不同覆草方式的试验研究，结果表明：（１）覆草可明显改善棉田生态条件，使棉田０～２０ｃｍ土壤含水量提高０．０７～１．８３个百分点，有机质含量提高０．１０３～０．２个百分点，速效钾含量提高４～３２ｍｇ／ｋｇ，容重下降０．０２７～０．０５７ｇ／ｃｍ３，孔隙度提高１．１～１．９个百分点；（２）覆草还可抑制棉田杂草的发生，对单子叶杂草的抑制效果更为明显；（３）覆草可使棉花成铃强度提高０．０１４９～０．０６９５铃／日·株，单株成铃数增加１．１５～２．５８个，亩总铃增加３９０５～８６２４个，单铃重提高０．１４～０．２９ｇ，产量提高１２．９９％～１９．４４％；（４）不同处理中，以亩覆草２００ｋｇ，高培土２０ｃｍ效果最佳；（５）其配套栽培技术主要是配施速效氮、磷肥，提高棉田培土高度
The results showed that: (1) Covering grass could improve the ecological conditions of cotton field significantly, and the water content of 0 ~ 20cm soil in cotton field increased 0.07 ~ 1.83% Organic matter content increased 0.103 ~ 0.2 percentage points, available potassium content increased 4 ~ 32mg / kg, bulk density decreased 0.027 ~ 0.057g / cm3, porosity increased 1.1 ~ 1.9 percentage points; (2 ) Mulching grass can also inhibit the occurrence of weeds in cotton fields, the inhibitory effect of monocotyledonous weeds is more obvious; (3) mulching grass can increase the boll intensity of cotton 0.0149 ~ 0.0695 bell / day · single The number of bolls per plant increased from 1.15 to 2.58, and the total boll number increased from 3905 to 8624. The boll weight increased by 0.14 to 0.29g and the yield increased by 12.99% to 19.44%. (4) In different treatments, it is best to use 200kg of mulched grass and 20cm of high-soil cultivation soil. (5) Nitrogen, phosphorus, improve cotton earth height