地膜再利用对向日葵田土壤脲酶活性的影响  

Effects of Re-Used Plastic Film Mulching on Soil Urease Activity of Sunflower

作　　者：史建国[1,2] 刘景辉[1] 薛韶霞[2] 闫雅非[1] 贾利欣 融晓萍 

机构地区：[1]内蒙古农业大学农学院,内蒙古呼和浩特010019 [2]包头轻工职业技术学院,内蒙古包头014045 [3]内蒙古农业技术推广站,内蒙古呼和浩特010011

出　　处：《作物杂志》2015年第5期161-163,共3页Crops

基　　金：包头市青年创新人才项目"地膜再利用对土壤酶活性的影响";农作物新品种及配套栽培技术"地膜二次利用免耕直播杂交向日葵栽培技术推广"(20101110);农业部"土壤有机质提升试点补贴--免耕栽培技术推广"项目

摘　　要：为探讨地膜再利用对土壤脲酶活性的影响,2011年在河套地区进行了旧膜、新膜覆盖及露地栽培向日葵对比试验。结果表明,地膜再利用可明显提高土壤脲酶活性。在0~40cm土层,旧膜覆盖的土壤脲酶活性较新膜覆盖土壤增加7.4%,较露地增加1.1%。土壤脲酶活性随向日葵生育期变化而不同,呈上升—下降—小幅上升的趋势。土壤脲酶活性随土层深度的增加均呈减小趋势,旧膜覆盖可以维持耕作层土壤脲酶较高的活性,但随土层加深,旧膜覆盖土壤脲酶活性下降幅度较露地大。地膜再利用改变了土壤脲酶活性,加速了土壤中潜在养分的有效化,为地膜再利用技术的推广应用提供了理论依据。Aiming at reducing agricultural pollution caused by plastic film, the effects of re-used plastic film mulching on soil urease activity were studied through comparing with the plastic film and open field in Hetao region. The results showed：soil urease activity of re-used film mulching increased at different degree. Compared with new film mulching and barefield, soil urease activity in 0 -40cm of re-used film were higher 7.4% and 1.1%, respectively. With the change of growth stages, soil urease activity increased at first, then declined and increased slightly at last. Vertical changes of the soil urease activity were reduced with increasing soil depth, but higher activity in plough layer（0 -20cm）when the plastic film was used. Thus, it can be seen that re-used film could also enhance soil urease activity though improved farmland ecological microenvironment.

关 键 词：地膜再利用 向日葵 土壤脲酶活性 

分 类 号：S565.5[农业科学—作物学] S154.2