Effects of seven-year nitrogen and phosphorus additions on soil microbial community structures and residues in a tropical forest in Hainan Island, China

Geoderma ◽  
2020 ◽  
Vol 361 ◽  
pp. 114034 ◽  
Author(s):  
Suhui Ma ◽  
Guoping Chen ◽  
Di Tian ◽  
Enzai Du ◽  
Wen Xiao ◽  
...  
Keyword(s):  
Microbial Community ◽  
Tropical Forest ◽  
Soil Microbial Community ◽  
Hainan Island ◽  
Community Structures ◽  
Nitrogen And Phosphorus ◽  
Soil Microbial ◽  
Microbial Community Structures

Long-term use of green manure legume and chemical fertiliser affect soil bacterial community structures but not the rate of soil nitrate decrease when excess carbon and nitrogen are applied

Soil Research ◽  
2017 ◽  
Vol 55 (6) ◽  
pp. 524 ◽  
Author(s):  
Misato Toda ◽  
Yoshitaka Uchida
Keyword(s):  
Microbial Community ◽  
Rice Straw ◽  
Soil Microbial Community ◽  
Green Manure ◽  
Community Structures ◽  
Hairy Vetch ◽  
Soil Microbial ◽  
Microbial Community Structures ◽  
Chemical Fertiliser

Legumes add not only nitrogen (N), but also carbon (C) to soils, so their effects on the soil microbial community may be different from those of chemical fertiliser. Soil microbes often compete with plants for N when excess C is applied due to their increased N immobilisation potentials and denitrification. In the present study we evaluated the effects of the 9-year use of a green manure legume (hairy vetch; Vicia villosa) in a greenhouse tomato system on soil microbial community structures as well as on the decrease of nitrate when rice straw was incorporated into the soil. Soil microbial community structures and their diversity were altered by the long-term use of legumes. The ratios of Acidobacteria, Gemmatimonadetes and Proteobacteria increased in the hairy vetch soils. The rates of decrease in nitrate were similar in soils with a history of chemical fertiliser and hairy vetch, following the addition of rice straw. In addition, during incubation with added rice straw, the difference between the two soil microbial community structures became less clear within 2 weeks. Thus, we conclude that even though growing a green manure legume changed soil bacterial community structures, this did not result in relatively faster loss of available N for plants when rice straw was added to the soils.

scholarly journals Soil Microbial Community Assembly and Interactions Are Constrained by Nitrogen and Phosphorus in Broadleaf Forests of Southern China

Forests ◽  
2020 ◽  
Vol 11 (3) ◽  
pp. 285 ◽  
Author(s):  
Mengxin Zhao ◽  
Jing Cong ◽  
Jingmin Cheng ◽  
Qi Qi ◽  
Yuyu Sheng ◽  
...  
Keyword(s):  
Microbial Community ◽  
Community Composition ◽  
Community Assembly ◽  
Soil Microbial Community ◽  
Southern China ◽  
Microbial Community Composition ◽  
Nitrogen And Phosphorus ◽  
Soil Microbial ◽  
Microbial Community Assembly ◽  
Microbial Functional Gene

Subtropical and tropical broadleaf forests play important roles in conserving biodiversity and regulating global carbon cycle. Nonetheless, knowledge about soil microbial diversity, community composition, turnover and microbial functional structure in sub- and tropical broadleaf forests is scarce. In this study, high-throughput sequencing was used to profile soil microbial community composition, and a micro-array GeoChip 5.0 was used to profile microbial functional gene distribution in four sub- and tropical broadleaf forests (HS, MES, HP and JFL) in southern China. The results showed that soil microbial community compositions differed dramatically among all of four forests. Soil microbial diversities in JFL were the lowest (5.81–5.99) and significantly different from those in the other three forests (6.22–6.39). Furthermore, microbial functional gene interactions were the most complex and closest, likely in reflection to stress associated with the lowest nitrogen and phosphorus contents in JFL. In support of the importance of environmental selection, we found selection (78–96%) dominated microbial community assembly, which was verified by partial Mantel tests showing significant correlations between soil phosphorus and nitrogen content and microbial community composition. Taken together, these results indicate that nitrogen and phosphorus are pivotal in shaping soil microbial communities in sub- and tropical broadleaf forests in southern China. Changes in soil nitrogen and phosphorus, in response to plant growth and decomposition, will therefore have significant changes in both microbial community assembly and interaction.

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