覆膜和灌溉对小麦秸秆还田土壤酶活性的影响

发布时间：2018-04-03 14:03

本文选题：小麦秸秆还田　切入点：蔗糖酶　出处：《干旱区资源与环境》2017年05期

【摘要】：为研究西北半干旱区小麦秸秆还田高效利用措施,采用大田模拟试验研究了覆膜和灌溉对小麦秸秆还田后土壤酶活性的影响。结果表明:与秸秆不还田(CK)相比,秸秆还田处理均显著增大了土壤蔗糖酶、脲酶、碱性磷酸酶和过氧化氢酶活性。与秸秆还田(S)相比,秸秆还田+覆膜处理(SC)增大了低温时土壤的酶活性,秸秆还田+灌溉处理(SW)对不同还田时期,还田深度10cm和20cm处土壤中的4种酶活性影响显著,均增大了酶活性。土壤蔗糖酶、脲酶、碱性磷酸酶和过氧化氢酶活性总体均以秸秆还田+覆膜+灌溉处理(SCW)的最高。从土壤总体酶活性大小考虑,在西北半干旱地区进行小麦秸秆还田,SCW处理为最佳的还田方式,可显著增大土壤中的酶活性。
[Abstract]:In order to study the effective utilization measures of wheat straw in semi-arid region of Northwest China, the effects of mulching and irrigation on soil enzyme activity after returning wheat straw to field were studied by field simulation experiment.The results showed that the soil invertase, urease, alkaline phosphatase and catalase activities were significantly increased by straw returning treatment.Compared with the application of straw and mulching, the enzyme activity of soil was increased under low temperature. The effects of straw irrigation on the four enzymes in soil at different returning stages, depth of 10cm and 20cm were significant, compared with those of mulch mulching treatment under straw mulching, and the soil enzyme activity was increased under low temperature, and the effect of straw irrigation on the activity of four enzymes in the soil at different returning stages and depth of 20cm was significant.Both of them increased the enzyme activity.The activities of soil sucrase urease alkaline phosphatase and catalase were the highest in the treatment of plastic film mulching irrigation.Considering the total enzyme activity of soil, the best way of returning wheat straw to field was SCW treatment in the semi-arid region of northwest China, which could increase the enzyme activity in soil significantly.
【作者单位】：甘肃农业大学资源与环境学院;
【基金】：甘肃省教育厅高等学校研究生导师科研项目(No.1102-09)资助
【分类号】：S141.4;S154.2

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