氮素有机肥替代对高粱产量和土壤性质的影响

王海燕, 毕如田, 聂萌恩, 霍晓兰, 于志勇, 刘平

Response of Sorghum Yield and Soil Properties to Organic Nitrogen Substitution of Chemical Fertilizer

Wang Haiyan, Bi Rutian, Nie Mengʼen, Huo Xiaolan, Yu Zhiyong, Liu Ping

表3 土壤理化特性与土壤酶活性相关关系

Table 3 Correlation coefficients between soil physiochemical properties and soil enzyme activities

指标 Index 总氮 Total nitrogen 有机质 Organic matter 碱解氮 Available hydrolyzed nitrogen 有效磷 Available phosphorous 速效钾 Available potassium 土壤容重 Soil bulk density 土壤孔隙度 Soil porosity 碱性磷酸酶 Alkaline phosphates 脲酶 Urease 蔗糖酶 Sucrase 碱性磷酸酶Alkaline phosphates 0.562* -0.283 0.754** 0.724** 0.723** 0.193 -0.194 1.000 脲酶Urease 0.712** 0.570* 0.466 0.344 0.319 -0.383 0.382 0.551* 1.000 蔗糖酶Sucrase 0.384 0.764** 0.273 0.054 -0.088 -0.720** 0.719** -0.204 0.670** 1.000