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| Effects of livestock and poultry manure amendment and wetting-drying cycle on functional diversity of soilmicrobial community |
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| DOI：10.16768/j.issn.1004-874X.2018.06.012 |
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| Abstract: |
| Water and fertilizer management is one of important measures in agricultural field management，it
may control the quality and ecological stability of agricultural soil. In this study，the tested soil samples were taken
from the plough-pan of a rice and wheat rotation agricultural system with long-term application of chemical fertilizer.
The organic carbon content of tested soil was poor. Incubation experiment was established with the amendment
of livestock and poultry manure and the intensity of wetting-drying cycle，to understand the effects of water and
organic fertilizer management on soil microbial community functional diversity. Results showed that livestock and
poultry manure amendment significantly improved the carbon using ability of soil microbial community. The soil
AWCD value with poultry manure and livestock manure treatment was 4.5 and 5.9 times higher than that in control
soil respectively；Richness index，Simpson index and Shannon index of soil microbial community were significantly
higher than those of control. Wetting-drying cycle intensity also had a significant influence on soil microbial
community functional diversity，showing the priming effect on soil microbial community functional diversity. And the
strong wetting-drying cycle had the most obvious effect on it. Results of factor analysis，correspondence analysis and
cluster analysis showed that livestock and poultry manure amendment was the main control factor on soil microbial
community function diversity，while the wetting-drying cycle was the second control factor. The results indicated that the combined effect of livestock and poultry manure amendment and wetting-drying cycle could influence the
functional diversity of soil microbial community by changing the carbohydrate and amino acid carbon source in soil. |
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