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A rice variety with a high straw biomass retained nitrogen and phosphorus without affecting soil bacterial species

soil Ecology Letters 2020年第2期2卷 131-144页

作者： Xinqiang Liang Fayong Li Sheng Wang Guifen Hua Miaomiao He Guangming Tian Sangar Khan Ravin Poudel Karen A.Garrett College of Environmental and Resource Sciences Zhejiang UniversityHangzhou 310058China College of Life Information Science and Instrument Engineering Hangzhou Dianzi UniversityHangzhou 310018China Department of Life and Environmental Science Hangzhou Normal UniversityHangzhou 310036China Plant Pathology Department Institute for Sustainable Food Systemsand Emerging Pathogens InstituteUniversity of FloridaGainesvilleFL 32611USA

It is well documented that rice paddy fields act as agricultural wetlands that remove or retain nutrients;however,their associated effects on soil microbial communities are rarely *** present study evaluates the impact of rice variety on nutrient removal via plant uptake,nutrient retention in the soil,and bacterial associations in rice paddy fields,using a network analysis that compares the soil bacterial communities of two rice *** found that the high-straw rice variety(YD-1)allows uptake of a high amount of nitrogen(N)and phosphorus(P)from paddy rice fields via harvesting,but causes less residual total N and P to remain in the ***,both rice varieties(YD-1 and XS-134(Xiushui-134))had non-significant effects on the dominant bacterial *** short-term response of bacterial community diversity to rice variety is found to be mainly due to less frequently recovered species.A network analysis that incorporates soil nutrients as nodes,along with bacterial taxa,found that only one node representing the total P related to the non-dominant species had an indirect association with the rice straw *** observed short-term impact of the two rice varieties(XS-134 and YD-1)on soil bacterial diversity and nutrient surplus in these agricultural wetlands is limited under a high level of fertilization.

关键词： Agricultural wetland Network analysis Nutrient Rice variety soil bacterial communities

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Co-invasion of daisy fleabane and Canada goldenrod pose synergistic impacts on soil bacterial richness

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Journal of Central South University 2020年第6期27卷 1790-1801页

作者： WEI Mei WANG Shu XIAO Hong-guang WU Bing-de JIANG Kun WANG Cong-yan School of the Environment and Safety Engineering Jiangsu UniversityZhenjiang 212013China

Understanding the impacts of co-invasion of multiple invaders on soil bacterial communities is significant in understanding the mechanisms driving successful *** study aimed to determine the response of soil bacterial communities to co-invasion of two invaders daisy fleabane(Erigeron annuus)and Canada goldenrod(Solidago canadensis).Daisy fleabane and/or Canada goldenrod invasion significantly enhanced the operational taxonomic unit richness,Shannon index,and Chao1 index of soil bacterial *** goldenrod under light degree of invasion and co-invasion of daisy fleabane and Canada goldenrod regardless of invasion degree signally improved the ACE index of soil bacterial ***,the two invaders can enhance soil bacterial diversity and richness to facilitating subsequent invasion due to the fact that higher soil bacterial diversity and richness can enhance the levels of soil function and nutrients acquisition of plant *** index of soil bacterial communities subjected to co-invasion of daisy fleabane and Canada goldenrod regardless of invasion degree was greater than that under the independent invasion of either daisy fleabane or Canada ***,co-invasion of the two invaders can impose synergistic impacts on soil bacterial richness,which may build a preferable soil micro-environment via the intensified soil bacterial communities,which is contributive to their following invasion.

关键词： co-invasion Erigeron annuus invasive plant species soil bacterial communities Solidago canadensis

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