【摘要】 分析普通地膜覆盖、小麦秸秆覆盖、地膜+秸秆覆盖3种覆盖物对旱地棉田土壤环境、棉花产量构成因素的影响,结果表明:覆盖栽培能改善土壤环境,降低土壤容重,提高土壤水分利用率,调节土壤温、湿度,协调水热资源利用的同步性;秸秆覆盖能增加土壤养分含量,特别是速效钾含量;在棉花生长后期,提高叶面积指数,延长叶片功能期,提高棉株的光合能力从而防止棉花早衰,增加铃重,提高棉花产量。更多还原

【Abstract】 Effect of mulching cultivation on soil environment and yield components of cotton were studied by using experiments with plastic film, wheat straw, plastic film plus wheat straw. The results indicated that soil environment improved through reducing soil bulk density and increased soil water use efficiency by mulching cultivation. Mulching cultivation had functions in regulating soil temperature and soil moisture, harmonizing utilization synchronization of water and heat resource. Straw mulching could increase soil nutrient contents especially available K. In cotton growth anaphase, straw mulching could increase leaf area index and extend leaf function period, cotton plant photosynthesis, and prevent cotton premature senescence, increase boll weight and cotton yield.更多还原