期刊论文

Zhang, Y.

中文

应用生态学报

1001-9332

2002

13

6

693-697

国家“九五”科技攻关重中之重项目 （ 95 0 0 10 10 3）； 湖南省教育厅科学基金资助项目；

本校为第一机构

通过野外调查取样和室内培养试验,应用Silva和Bremner方法,研究了湖南省主要类型稻田土壤的固定态铵含量及其影响因素.结果表明,该省主要类型稻田土壤固定态铵含量为141～353mg*kg-1,平均为272?7mg*kg-1,占土壤全N的11.2%,高于湖南省以北各地区土壤和本地区地带性土壤棗红壤的固定态铵含量.其含量的顺序为河沙泥>紫泥田>潮沙泥>黄泥田>红黄泥.在土壤剖面中,固定态铵含量随剖面深度的变化有4种情况:在1m深度范围内随深度增加而增加;随深度增加而减少;随深度增加而无明显变化;土壤剖面中某一土层固定态铵含量明显增加或减少.土壤固定态铵含量占土壤全N百分比随深度增加而恒增大.土壤对NH+4的固定作...

By the method of Silva and Bremner, the fixed ammonium content of chief paddy soil types in Hunan Province and its influencing factors were studied. The results showed that the content of fixed ammonium in plough layer ranged from 141 mg.kg-1 to 353 mg.kg-1, averaged 272 +/- 67 mg.kg-1, and accounted for 11.2% of total soil N. The content of fixed ammonium was in order of alluvial sandy soil > purple clayey soil > newly alluvial sandy soil > yellow clayey soil > reddish yellow clayey soil. There were four distribution models of fixed ammonium in the soil profiles: 1) fixed ammonium content inc...