摘要
在盆栽和田间条件下,研究了作物吸氮与土壤可矿化氮的关系。盆栽试验中,一季玉米吸氮占N0的百分数平均为28.0±5.1%,小麦为16.1±3.1%,一季玉米吸收的土壤可矿化氮平均为4.3±0.3kg/亩,小麦为3.7±1.3kg/亩。田间试验并未发现可矿化氮在土壤剖面中的累积,一季玉米吸收的土壤可矿化氮为4.34kg/亩,小麦为7.
The relationship between mineralizable soil N and crop N uptake was studied under the condition of pot and field experoments respectively.In pot experiment,maize N uptake was 28.0±5.1% of N 0 while wheat N uptake was 16.1±3.1%;and maize mineralized N uptake was 4.3±0.3kg/mu on an average while wheat mineralized N uptake was 3.7±1.3kg/mu.In the field experiment,accumulative mineralized N was not observed in soil;maize mineralized N uptake was 4.34kg/mu while wheat minera lized N uptake was 7.19kg/mu.
出处
《干旱地区农业研究》
CSCD
北大核心
1996年第4期29-33,共5页
Agricultural Research in the Arid Areas
基金
国家自然科学基金
关键词
土壤可矿化氮
作物吸氮
氮素矿化势
soil mineralizable N
crop N uptake
N mineralizable potentiality