腐殖酸长效尿素在土壤中转化及其对玉米增产的效应研究  

Transformation of long-lasting UHA in soil and its effect on maize yield

作　　者：李兆君[1,2] 马国瑞[1] 王申贵[3] 陆欣[3] 

机构地区：[1]浙江大学环境与资源学院 [2]中国农业科学院农业资源与农业区划研究所北京100081 [3]山西农业大学资源与环境学院

出　　处：《中国生态农业学报》2005年第4期121-123,共3页Chinese Journal of Eco-Agriculture

摘　　要：试验研究腐殖酸长效尿素(Ⅰ、Ⅱ)在土壤中转化及其对玉米增产效应结果表明,与普通尿素相比,施用腐殖酸长效尿素玉米生长发育前期可抑制土壤中脲酶活性,向土壤环境供N速度基本与玉米生长发育需N速度相一致。同时可提高玉米不同生育期叶片叶绿素含量和光合作用强度,显著提高玉米籽粒产量。其中以Ⅰ型长效尿素效果最佳,比普通尿素处理增产35.1%。The transformation of two types of long-lasting urea in soil and its effect on maize yield were studied. The resuits show that the application of UHA can inhibit the activity of urease in soil in the first period of maize development and its rate of nitrogen yield is constant with that of nitrogen need of maize. The application of UHA can increase the chlorophyll and photosynthesis intensity of maize , consequently increasing the crop yield, among which UHA Ⅰ is the best. Application of UHA Ⅰ can increase the maize yield by 35.1% compared to urea.

关 键 词：长效尿素 脲酶 玉米 产量 土壤环境 腐殖酸 效应研究 转化 叶片叶绿素含量 生长发育 

分 类 号：S153.622[农业科学—土壤学] TQ441.41[农业科学—农业基础科学]