Efficiency and selectivity of two methods for determination of nitrogen in soil microbial biomass

被引：0
作者：
Blagodatskii, SA [1 ]
Evdokimov, IV [1 ]
DeLuca, TH [1 ]
机构：
[1] UNIV MONTANA,SCH FORESTRY,MISSOULA,MT 59812
来源：
EURASIAN SOIL SCIENCE | 1997年 / 30卷 / 09期
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D O I：
暂无
中图分类号：
S15 [土壤学];
学科分类号：
0903 ; 090301 ;
摘要：
A rehydration-extraction method for measuring soil microbial nitrogen was compared with the widely used fumigation-extraction technique in incubation experiments with gray forest soil and chernozem. Soils were enriched with water solutions of (NH4)(2)SO4 (unlabelled or labelled with N-15) and glucose with different C:N ratios. The efficiency and selectivity of the methods, estimated using the conversion factor k(N) and extractability indexes ER' and ER*, were similar. Nitrogen of soil microbial biomass can be measured using both methods with application of a variable k(N) calculated on the basis of the ratio of increments of C and N extracted.
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页码：1015 / 1023
页数：9
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