土壤无机氮解吸模型及其特征值生物效应研究  

Desorption Model of Soil Inorganic Nitrogen and Its Character Value to Bio-effect

作　　者：颜明娟[1] 章明清[1] 陈子聪[1] 林琼[1] 李娟[1] 熊德忠[2] 

机构地区：[1]福建省农科院土肥所 [2]福建农林大学资环学院,福建福州350013

出　　处：《土壤通报》2007年第1期19-24,共6页Chinese Journal of Soil Science

基　　金：加拿大钾磷研究所的资助(Fujian-13)

摘　　要：8种土壤126个氮素解吸实验表明,解吸模型C=ClH-a能模拟土壤铵态氮、硝态氮的解吸动态规律,其中有125个实验的复相关系数达到极显著水平。盆栽试验和田间试验结果表明,对生长期较短的空心菜、菜心和莴苣而言,土壤氮素可解吸量Q和土壤溶液氮素初始浓度C li与供试蔬菜的氮素吸收量和产量之间有显著的抛物线型关系,为评价土壤氮素生物有效性和临界指标提供了一种新方法。The results 126 nitrogen desorpfion experiments showed that desorption model C = C1 H^-a can simulate the desorption processes of soil ammonium and nitrate, and 125 experiment correlation coefficients were significant. The result of pot and field trials showed that there were significant parabolic relationship between the nitrogen desorption quantity or initial nitrogen concentrations in soil solution with nitrogen contents and yields of the tested vegetables, water spinach, cabbage and lettuce. The result provides a new method to evaluate bio - effectiveness and critical index of soil nitrogen.

关 键 词：土壤 氮素 解吸 模型 

分 类 号：S153.61[农业科学—土壤学]