Cover Crop and Irrigation Effects on Soil Microbial Communities and Enzymes in Semiarid Ag

Cover Crop and Irrigation Effects on Soil Microbial Communities and Enzymes in Semiarid Agroecosystems of the Central Great Plains of

North America

Francisco J.CALDERóN1，?，David NIELSEN1，Veronica ACOSTA-MARTíNEZ2，Merle F.VIGIL1and Drew LYON3 1USDA-ARS，Central Great Plains Research Station，Akron CO 80720（USA）2USDA-ARS，Cropping Systems Research Laboratory，Wind Erosion and Water Conservation Unit，Lubbock TX 79415（USA）3Department of Crop and Soil Sciences，Washington State University，Pullman WA 99164-6420（USA）（Received July 2，2015；revised December 14，2015）【期刊名称】土壤圈（英文版）

【年(卷),期】2016(026)002

【总页数】14

【关键词】Key Words: crop rotation，enzyme activity，FAME profile，fatty acid methyl ester，winter wheat

ABSTRACT

Cover crops can have beneficial effects on soil microbiology by increasing carbon（C）supply，but these beneficial effects can be modulated by precipitation conditions.The objective of this study was to compare a fallow-winter wheat（Triticum aestivum L.）rotation to several cover crop-winter wheat rotations under rainfed and irrigated