二甲戊灵对棉田土壤酶活性的影响

发布时间：2018-09-06 16:35

【摘要】：【目的】研究新疆棉田土壤施用二甲戊灵对土壤酶活性的影响。【方法】棉田土壤施用二甲戊灵0、2 700、4 050、5 400 g·hm~(-2),分析不同处理时间、不同深度土壤酶活性的变化规律。【结果】施用二甲戊灵后,土壤碱性磷酸酶活性明显被抑制,处理40 d后,5~10 cm土壤层碱性磷酸酶活性被抑制作用最强,二甲戊灵2 700、4 050、5 400g·hm~(-2)处理的碱性磷酸酶活性抑制率分别为93.79%、90.77%、87.43%;脲酶活性总体表现激活趋势;蔗糖酶和脱氢酶活性随二甲戊灵浓度增高而增强,表层土壤酶活性较10~20 cm深层土壤激活作用显著;随着处理时间的增加,0~10 cm土壤层过氧化氢酶活性呈现先抑制后激活的趋势。【结论】棉田土壤经二甲戊灵处理后,表现为脲酶、过氧化氢酶的激活效应;但二甲戊灵会抑制碱性磷酸酶活性,降低土壤有效磷素,长期施用会导致土壤营养失衡。
[Abstract]:[objective] to study the effect of the application of penicillin on soil enzyme activity in cotton fields of Xinjiang. [results] the alkaline phosphatase activity of soil was inhibited obviously after the application of dimethopentyl, and the activity of alkaline phosphatase in soil layer of 510 cm was the strongest after 40 days of treatment. The inhibition rate of alkaline phosphatase activity treated with dimethopentalin 2 050,500 g hm~ (-2) was 93.79 and 90.777.43g, respectively. The urease activity showed a general activation trend, and the sucrase and dehydrogenase activities increased with the increase of dimethylpentalin concentration. The activity of catalase in the surface soil layer was significantly higher than that in the deep soil layer for 10 ~ 20 cm, and the catalase activity in the soil layer of 10 cm was inhibited first and then activated. [conclusion] the soil of cotton field was treated with dimethylpentalin as urease, and the activity of catalase in soil layer increased with the increase of treatment time. Catalase activation effect, but dimethopentyl can inhibit alkaline phosphatase activity, reduce soil available phosphorus, long-term application will lead to soil nutrition imbalance.
【作者单位】：石河子大学农学院/新疆绿洲农业病虫害治理与植保资源利用自治区普通高校重点实验室;
【基金】：国际合作项目((2015DFA11660)
【分类号】：S154.2;S482.4

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