土壤易矿化有机态氮和微生物态氮作为土壤氮素生物有效性指标的评价  

Evaluation of soil easily mineralizable nitrogen and microbial biomass nitrogen for biological available index

作　　者：宋建国[1] 林杉[2] 吴文良[2] 毛达如[2] 

机构地区：[1]中国科学院生态环境研究中心,北京100085 [2]中国农业大学资源与环境学院,北京100094

出　　处：《生态学报》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 )

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.

关 键 词：易矿化有机态氮 微生物态氮 生物有效性 

分 类 号：S153.6[农业科学—土壤学] S154[农业科学—农业基础科学]