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| Influence of Long-term Applications of Biogas Slurry on Microbial Community Composition and Enzymatic Activities in Surface Soil Under Rice-Rape Rotation |
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| KeyWord:biogas slurry, rice-rape rotation, surface soil, soil microbial community, soil enzyme activity |
| Author Name | Affiliation | | FENG Dan-ni | College of Resources and Environment, Sichuan Agricultural University, Chengdu 611130, China | | WU Jun | College of Resources and Environment, Sichuan Agricultural University, Chengdu 611130, China | | YANG Gang | College of Resources and Environment, Sichuan Agricultural University, Chengdu 611130, China | | ZHANG Lin-wei | College of Resources and Environment, Sichuan Agricultural University, Chengdu 611130, China | | ZHANG Yi-han | College of Resources and Environment, Sichuan Agricultural University, Chengdu 611130, China | | WANG Jing-wen | College of Resources and Environment, Sichuan Agricultural University, Chengdu 611130, China |
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| Abstract: |
| Biogas slurry contains plant nutrients and growth hormones, which may promote plant growth and in turn impact soil microorganisms and their activities. The influence of long-term applications of biogas slurry on microorganism community and enzyme activities was examined in yellow soil under rice-rape rotation in Heishi village of Sichuan Province. Twelve treatments（one clean water control, one conventional fertilizer, and ten different rates of pure biogas slurry were designed. Three year applications of biogas slurry reduced the bacterial to fungal ratio（B/F）, increased microbial population and enzymatic activities. As biogas slurry rates increased, however, bacterial population increased continuously, whereas actinomyces and fungi and catalase activity increased initially and then decreased but urease and sucrase activities showed "decrease-increase-decrease" pattern. At 495.31～546.32 t·hm-2 of biogas slurry, both soil microorganisms and enzymatic activities remained at a relatively high level over the three year period. This result suggests that long-term application of biogas slurry could improve soil microorganism and enzyme activities. |
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