Management-induced change in labile soil organic matter under continuous corn in eastern Canadian soils

被引：227

作者：

Liang B.C. ^{[1
]}

Schnitzer M. ^{[1
]}

Monreal C.M. ^{[1
]}

MacKenzie A.F. ^{[2
]}

Voroney P.R. ^{[3
]}

Beyaert R.P. ^{[4
]}

机构：

[1] E. Cereal and Oilseed Res. Centre, Agriculture and Agri-Food Canada, Ottawa

[2] Dept. of Natural Resource Science, Macdonald Campus, McGill University, Ste. Anne de Bellevue, Que. H9X3V9

[3] Department of Land Resource Science, University of Guelph, Guelph

[4] Pest Management Research Centre, Agriculture and Agri-Food Canada, Delhi

来源：

Biology and Fertility of Soils | 1997年 / 26卷 / 2期

基金：

加拿大自然科学与工程研究理事会;

关键词：

!sup]13[!/sup]C nuclear magnetic resonance; Fertilizer nitrogen; Infrared spectrophotometry; Light fraction organic carbon; Microbial biomass C; Water-soluble organic carbon;

D O I：

10.1007/s003740050348

中图分类号：

学科分类号：

摘要：

Soil samples taken from four experimental sites that had been cropped to continuous Corn for 3-11 years in Ontario and Quebec were analyzed to evaluate changes in quantity and quality of labile soil organic carbon under different nitrogen (N) fertility and tillage treatments. Addition of fertilizer N above soil test recommendations tended to decrease amounts of water-soluble organic carbon (WSOC) and microbial biomass carbon (MBC). The quality of the WSOC was characterized by 13C nuclear magnetic resonance and infrared spectrophotometry and the results indicated that carbohydrates, long-chain aliphatics and proteins were the major components of all extracts. Similar types of C were present in all of the soils, but an influence of management was evident. The quantity of soil MBC was positively related to the quantities of WSOC, carbohydrate C, and organic C, and negatively related to quantities of long-chain aliphatic C in the soil. The quantity of WSOC was positively related to the quantities of protein C, carbohydrate C, and negatively related to the quantity of carboxylic C. The quantity of soil MBC was not only related to quantities of soil WSOC but also to the quality of soil WSOC.

引用

页码：88 / 94

页数：6

共 26 条

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