摘要
通过盆栽试验研究了土壤易矿化有机态氮和土壤微生物态氮与土壤净矿化氮及植物吸氮量之间的关系。结果表明 ,种植前土壤易矿化有机态氮和土壤微生物态氮以及种植前后土壤易矿化有机态氮的变化量均与土壤氮素净矿化量和植物吸氮量之间存在显著的相关性。在盆栽试验条件下 ,土壤易矿化有机态氮和种植前土壤微生物态氮能够较好地反映土壤氮素的矿化和供应能力 ,可以作为土壤氮素的生物有效性指标。
There was a significant correlation between soil easily mineralizable nitrogen and microbial biomass nitrogen measured before planting with the net nitrogen mineralization and plant nitrogen uptake. The significant relationship was also found between the difference of easily mineralizable nitrogen before and after planting with soil net nitrogen mineralizable and plant nitrogen uptake. It is concluded that the soil easily mineralizable nitrogen and microbial biomass nitrogen can be taken as the biological available index for soil nitrogen mineralization and availability in the pot experiment.
出处
《生态学报》
CAS
CSCD
北大核心
2001年第2期290-294,共5页
Acta Ecologica Sinica
基金
国家自然科学基金!资助项目 ( 39630 0 70和 4 9771 0 52 )
关键词
易矿化有机态氮
微生物态氮
生物有效性
soil easily mineralizable nitrogen
microbial biomass nitrogen
biological available index
