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The Scientific World Journal
Volume 2014, Article ID 451493, 12 pages
http://dx.doi.org/10.1155/2014/451493
Research Article

Effects of Deep Tillage and Straw Returning on Soil Microorganism and Enzyme Activities

1Agronomy College, Henan Agricultural Universtiy, Zhengzhou 450002, China
2Institute of Horticulture, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
3Institute of Digital Agriculture, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang 310021, China
4Department of Engineering, Nova Scotia Agricultural College, Truro, NS, Canada B2N 5E3

Received 10 November 2013; Accepted 2 February 2014; Published 26 March 2014

Academic Editors: M. R. Simón and T. Takamizo

Copyright © 2014 Baoyi Ji et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Two field experiments were conducted for two years with the aim of studying the effects of deep tillage and straw returning on soil microorganism and enzyme activity in clay and loam soil. Three treatments, (1) conventional tillage (CT), shallow tillage and straw returning; (2) deep tillage (DT), deep tillage and straw returning; and (3) deep tillage with no straw returning (DNT), were carried out in clay and loam soil. The results showed that deep tillage and straw returning increased the abundance of soil microorganism and most enzyme activities. Deep tillage was more effective for increasing enzyme activities in clay, while straw returning was more effective in loam. Soil microorganism abundance and most enzyme activities decreased with the increase of soil depth. Deep tillage mainly affected soil enzyme activities in loam at the soil depth of 20–30 cm and in clay at the depth of 0–40 cm. Straw returning mainly affected soil microorganism and enzyme activities at the depths of 0–30 cm and 0–40 cm, respectively.