3Birkhofer K, Bezemer T M, Bloem J, et al. Long-term or- ganic farming fosters below and aboveground biota: Implica- tions for soil quality, biological control and productivity [J]. Soil Biology and Biochemistry 2008, 40:2 297-2 308.
4Chu H, Lin X, Fujii T, et al. Soil microbial biomass, dehy- drogenase activity, bacterial community structure in re- sponse to long-term fertilizer management [J]. Soil Biology and Biochemistry, 2007, 39:2 971-2 976.
5Effstrand S, Hedlund K, Martensson A. Soil enzyme activi- ties, microbial community composition and function after 47 years of continuous green manuring[J]. Applied Soil Ecolo- gy, 2007, 35: 610-621.
6Shukla S K, Yadav R L, Suman A, et al. Improving rhizo- spheric environment and sugarcane ratoon yield through bioagents amended farm yard manure in udic ustochrept soil[J]. Soil and Tillage Research, 2008, 99: 158-168.
7Carrera L M, Buyer J S, Vinyard B, et al. Effects of cover crops, compost, and manure amendments on soil microbial community structure in tomatoproduction systems [J]. Ap- plied Soil Ecology, 2007, 37: 247-255.