Microbial Species and Functional Diversity in Rice Rhizosphere of High-yield Special Ecological Areas

云南永胜涛源乡是保持我国水稻小面积超高产纪录的特殊生态区，采用平板计数法和BIOLOG碳素利用法，研究该地区水稻根际微生物物种和功能多样性。结果表明，高产水稻根际可培养微生物总数接近对照2倍，三大类微生物数量表现为细菌 > 放线菌 > 真菌，属健康的“细菌型”土壤，水稻高产与自然土层中的微生物关系不大。高产水稻土Shannon均匀度指数（E）和Simpson指数（D）均与对照无显著差异，Shannon多样性指数（H）与对照达到差异显著，微生物物种多样性和均匀度不是高产与非高产区域的主要差别。AWCD值分析表明，高产水稻土群落代谢活性总体强于对照，二者间的差别幅度由大到小表现为分蘖期...

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Bibliographic Details
Published inJournal of agricultural resources and environment Vol. 33; no. 6; p. 583
Main Authors Li-Yuan, Pan, Xiao, Wei, Dong, Yan, Gong-Cheng, Li, Zhang, Nai-Ming, Hong-Ping, Duan, Shi-Ying, Zhang
Format Journal Article
LanguageChinese
Published Tianjin Journal of Agricultural Resources and Environment (JARE) 01.01.2016
Subjects
Actinomycetes
Agricultural production
Agriculture
Bacteria
Biodiversity
Biological effects
Carbon sources
Communities
Crop yield
Cultivation
Ecology
Ecosystems
Exudates
Exudation
Fungi
Grain cultivation
Microbial activity
Microorganisms
Oryza
Plant growth
Rhizosphere
Rice
Rice fields
Science
Seedlings
Soil bacteria
Soil investigations
Soil layers
Soil microorganisms
Soil sciences
Soils
Species diversity
Beijing China
New York
Netherlands
United States > US
China
Brazil
Yunnan China
India
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Summary:云南永胜涛源乡是保持我国水稻小面积超高产纪录的特殊生态区，采用平板计数法和BIOLOG碳素利用法，研究该地区水稻根际微生物物种和功能多样性。结果表明，高产水稻根际可培养微生物总数接近对照2倍，三大类微生物数量表现为细菌 > 放线菌 > 真菌，属健康的“细菌型”土壤，水稻高产与自然土层中的微生物关系不大。高产水稻土Shannon均匀度指数（E）和Simpson指数（D）均与对照无显著差异，Shannon多样性指数（H）与对照达到差异显著，微生物物种多样性和均匀度不是高产与非高产区域的主要差别。AWCD值分析表明，高产水稻土群落代谢活性总体强于对照，二者间的差别幅度由大到小表现为分蘖期 > 收获期 > 苗期 > 轮作期，水稻生长越旺盛，与对照间碳源利用能力差别越大。Shannon、Simpson和McIntosh 3个多样性指数综合分析表明，高产水稻土根际微生物数量更多，代谢能力更强，微生物群落分布更均匀，多样化程度更高，能够利用的碳源种类更丰富，数量占比较大、种类较集中的常见种并不是形成产量优势的重要因素；分蘖期是高产水稻生长的关键时期，分蘖期根际微生物数量多、种类繁、代谢能力强、代谢类型多是高产水稻旺盛生长和高产形成的关键所在。 Taoyuan, Yunnan Province is a special eco-site which keeps the highest yield records of rice cultivation in small planting areas. Soil microbial species and functional diversity were evaluated using cultivation method and BIOLOG ecoplates. The results showed that the microbial community of the high yield region was more abundant, and the total microbial population was 2 times of the control, furthermore, the areas belonged to the healthy bacteria soil, which was showed as bacteria > actinomycetes
ISSN:2095-6819
2095-6819
DOI:10.13254/j.jare.2016.0074