硼砂对灰棕紫泥土尿素转化与脲酶活性的影响  

The effect on the urea transformation of gray-brown-purple-mud soil of borax and its urease activity

作　　者：赵小平[1] 许明惠[1] 李昌满[2] 

机构地区：[1]重庆工贸职业技术学院,重庆涪陵408003 [2]长江师范学院生命科学与技术学院,重庆涪陵408100

出　　处：《中国土壤与肥料》2014年第2期58-60,共3页Soil and Fertilizer Sciences in China

基　　金：重庆市教委科技项目kj122304;重庆市科委攻关项目CSTC;2010AC1001

摘　　要：采用室内培养,连续取样测定培养期内0%、0.5%、1%、1.5%和2%的硼砂对灰棕紫泥土中尿素、铵态氮、硝态氮和脲酶活性变化的影响。结果表明,硼砂能抑制脲酶活性,进而减缓尿素水解速度与铵态氮释放速度,0.5%的硼砂效果较弱,随硼砂用量的增大,效果增强;硼砂对硝态氮的积累影响不大。由于硼本身就是作物必需营养元素,因此作为尿素缓释剂有着良好的应用前景。By indoor culture,the effect of borax on the change of soil urea,NH＋ 4-N,NO-3-N and urease activity at the application rate of 0%,0. 5%,1%,1. 5% and 2% borax amount. The results showed that borax could inhibit soil urease activity,and then decreased the urea hydrolysis rate and NH＋ 4-N release rate; the increase of borax dosage more than 0. 5% could have more significant effect on the hydrolysis rate of urea and NH＋ 4-N release rate; the borax application had little influence on soil nitrate content. Boron is an essential nutrient element for crop,which can be used as urea slow-released agent,showing a good application prospect.

关 键 词：硼砂 尿素转化 脲酶活性 灰棕紫泥土 

分 类 号：S143.7[农业科学—肥料学] S154.2[农业科学—农业基础科学]