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Long-term rice-rice-green manure rotation changing the microbial communities in typical red paddy soil in South China

引用

Journal of Integrative Agriculture 2015年第12期14卷 2512-2520页

作者： GAO Song-juan ZHANG Ren-gang CAO Wei-dong FAN Yuan-yuan GAO Ju-sheng HUANG Jing BAI Jin-shun ZENG Nao-hua CHANG Dan-na shimizu katsu-yoshi Kristian Thorup-Kristensen Key Laboratory of Plant Nutrition and Fertilizer Ministry of AgricultureInstitute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural Sciences The Graduate School Chinese Academy of Agricultural Sciences College of Life Science and Technology Beijing University of Chemical Technology Soil and Fertilizer Institute Qinghai Academy of Agriculture and Forestry Sciences Qinghai University College of Resources and Environmental Sciences China Agricultural University Red Soil Experimental Station in Hengyang Chinese Academy of Agricultural Sciences Faculty of Agriculture Kagoshima University Department of Plant and Environmental Sciences University of Copenhagen

On the basis of a long-term（30 years） field experiment that involved four rotation systems, rice-rice-winter fallow（RRF）, rice-rice-ryegrass（RRG）, rice-rice-rape（RRP）, and rice-rice-milk vetch（RRV）, this study described the effects of green manure on the microbial communities in the red paddy soils using 454 pyrosequencing for the 16 S r RNA gene. The Chao1 richness and non-parametric Shannon＇s index increased in all soil samples that received green manure treatments. The communities＇ structures with the green manure applications were significantly dissimilar from that under the winter fallow. Using Metastats tests, many genera in the RRG, RRP and RRV soils were significantly different from those in the RRF soil, including a number of genera that functioned in the nitrogen and sulfur cycles. Analyses of the genera with these functions revealed the shifts in microbial ecosystem functions after long-term green manuring. Changes in the microbial communities increased the ammonium supply and decreased the soil acidification in green-manure-amended soils. Together, these data suggested powerful effects of green manure on both the microbial communities and the biogeochemical cycle driven by the shifts in bacterial functional groups.

关键词： green manure community structure community function 16S rRNA gene double rice

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