Soil Microbial Biomass Nitrogen and Its Relationship to Uptake of Nitrogen by Plants

被引:18
作者
ZHOU JIANBIN
机构
基金
中国国家自然科学基金;
关键词
mineral N; N uptake; soil microbial biomass N;
D O I
暂无
中图分类号
S154.3 [土壤微生物学];
学科分类号
071012 ; 0713 ;
摘要
The contents of the soil microbial biomass nitrogen (SMBN) in the soils sampled from the Loess Plateau of China were determined using chloroform fumigation aerobic incubation method (CFAIM), chloroform fumigation anaerobic incubation method (CFANIM) and chloroform fumigation-extraction method (CFEM). The N taken up by ryegrass on the soils was determined after a glasshouse pot experiment. The flushes of nitrogen (FN) of the soils obtained by the CFAIM and CFANIM were higher than that by the CFEM, and there were significantly positive correlations between the FN obtained by the 3 methods. The N extracted from the fumigated soils by the CFAIM, CFANIM and CFEM were significantly positively correlated with the N uptake by ryegrass. The FN obtained by the 3 methods was also closely positively correlated with the plant N uptake. The contributions of the SMBN and mineral N and mineralized N during the incubation period to plant N uptake were evaluated with the multiple regression method. The results showed that
引用
收藏
页码:251 / 256
页数:6
相关论文
共 1 条
[1]   Turnover of organic nitrogen in soils and its availability to crops [J].
Mengel, K .
PLANT AND SOIL, 1996, 181 (01) :83-93