Conservation tillage, rotations, and cover crop affecting soil quality in the Tennessee valley: Particulate organic matter, organic matter, and microbial biomass

被引：33

作者：

Motta, Antonio C. V. ^{[1
,2
]}

Reeves, D. Wayne ^{[3
]}

Burmester, Charles ^{[4
]}

Feng, Y. ^{[4
]}

机构：

[1] Univ Fed Parana, CAPES, BR-80050050 Curitiba, Parana, Brazil

[2] Auburn Univ, Auburn, AL 36849 USA

[3] USDA ARS, J Phil Campbell Sr Nar Resources Conservat Ctr, Watkinsville, GA USA

[4] Auburn Univ, Dept Agron & Soils, Auburn, AL 36849 USA

来源：

COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS | 2007年 / 38卷 / 19-20期

关键词：

conservation tillage; cotton; cover crop; soil organic matter;

D O I：

10.1080/00103620701663065

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

The impact of conservation tillage, crop rotation, and cover cropping on soil-quality indicators was evaluated in a long-term experiment for cotton. Compared to conventional-tillage cotton, other treatments had 3.4 to 7.7 Mg ha(-1) more carbon (C) over all soil depths. The particulate organic matter C (POMc) accounts for 29 to 48 and 16 to 22% of soil organic C (SOC) for the 0- to 3- and 3- to 6-cm depths, respectively. Tillage had a strongth influence on POMc within the 0- to 3-cm depth, but cropping intensity and cover crop did not affect POW A large stratification for microbial biomass was observed varing from 221 to 434 and 63 to 110 mg kg(-1) within depth of 0-3 and 12-24 cm respectively. The microbial biomass is a more sensitive indicator (compared to SOC) of management impacts, showing clear effect of tillage, rotation, and cropping intensity. The no-tillage cotton double-cropped wheat/soybean system that combined high cropping intensity and crop rotation provided the best soil quality.

引用

页码：2831 / 2847

页数：17

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