期刊论文

中文

湖南农业大学学报(自然科学版)

1007-1032

2010

36

6

700-704

10.3724/SP.J.1238.2010.00700

国家科技支撑计划项目（2006BAD17B08-03）；

本校为第一机构

采用野外调查取样和室内分析相结合的方法,研究了洞庭湖平原冲积性菜园土无机氮形态及剖面分布规律.结果表明,耕层土壤全N平均含量为1.25g/kg,变化范围为0.65~1.67g/kg,变异系数为15.54%;固定态铵平均含量为295mg/kg,占土壤全氮含量的23.2%,NO3--N和NH4+-N平均含量分别为46.00,1.91mg/kg.土壤全N,铵态氮,固定态铵含量在0~80cm土层中随剖面深度的增加而降低,硝态氮的剖面分布表现有淋洗下移的现象

By means of both field investigation samples and indoor analysis,The inorganic nitrogen fractions and profile distribution characteristic in vegetable soil derived from river alluvial in dongting lake plain were researched.The result indicated that the content of total nitrogen varies from 0.65~1.67 g/kg,the average value and coefficient of variation is respectively 1.25 g/kg and 15.54%.The average value of fixed ammonium is 290 mg/kg,accounting for 23.2% of total nitrogen.The content of NO3--N and NH4＋-N is respectively 46.00 mg/kg and 1.91 m...