【摘要】 1986～1987年作者根据Bremner的酸解法研究了吉林省主要旱田土壤有机氮组份、含量及影响因素,研究结果表明:旱田土壤有机氮是由氨基酸氮、氨基精氮、(丝+苏)氨基酸氮和未鉴别氮组成,分别占土壤全氮的25.13;18.54.5.19,11.38,25.59％;土壤类型、土壤层次以及土壤肥力水平均影响土壤有机氮的组份;土壤有机氮组份和含量是影响土壤碱解氮利用系数的内在原因。更多还原

【Abstract】 In this paper the compositions and contents of organic nitrogen in major dryland soils in Jilin Province are studied. The results of the experiment are summarized as follows:l.The compositions and contents of the organic nitrogen are amino acid-N (25.13%) , amino sugar-N (18.54%) , serine+threonine -N (5.19) , unknown-N (11.38) and aciduninsoluble-N (25.59%) ;2.The amino acids consists of ASP., valine, serine, gluine etc.The composition of amino acids in various soils and depth of soil profiles was similiar;3.The contents of organic nitrogen differ with different soil profiles, soil fertility and cultivating methods etc.;4.The utilization ratio of alkalidrosi-N in various soils was influenced by the rate between easily-mineralizable and difficitly-mineralizable organic nitrogen with the total nitrogen.更多还原