Carbon mineralization in soils of different textures as affected water-soluble organic carbon extracted from composted dairy manure

被引：41

作者：

Liang, BC ^{[1
]}

Gregorich, EG ^{[1
]}

Schnitzer, M ^{[1
]}

Voroney, RP ^{[1
]}

机构：

[1] UNIV GUELPH,DEPT LAND RESOURCE SCI,GUELPH,ON N1G 2W1,CANADA

来源：

BIOLOGY AND FERTILITY OF SOILS | 1996年 / 21卷 / 1-2期

关键词：

carbon mineralization; water-soluble organic carbon; texture; microbial biomass carbon; C-13-NMR;

D O I：

10.1007/BF00335987

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

The water-soluble organic C in composted manure contains a portion of labile C which can stimulate soil microbial activity, The objective of this experiment was to evaluate the effects of water-soluble organic C extracted from composted dairy manure on C mineralization in soil with different textures. Three soils with textures varying from 3 to 54% clay were amended with 0 to 80 mg water-soluble organic C kg(-1) soil extracted from a composted dairy manure and incubated for 16 weeks at 23 degrees C. The total amount of C mineralized was greater than the amount of C added in the three soils. Differences in mineralizable C with and without added water-soluble organic C were approximately 13 - 16 times, 4.8 - 8 times, and 7.5 - 8 times greater than the amount of C added to clay, loam, and sand soils, respectively. The results of this experiment suggest that immediately following composted manure applications, C mineralization rates increase, and that most of the C mineralized comes mainly from the indigenous soil organic C pool.

引用

页码：10 / 16

页数：7