| Title | Microbial carbon source utilization in rice rhizosphere soil with different tillage practice in a double cropping rice field |
| Publication Type | Journal Article |
| Year of Publication | 2021 |
| Authors | Tang H.M, Xiao X.P, Li C., Shi L.H, Cheng K.K, Li W.Y, Wen L., Xu Y.L, Wang K. |
| Journal | Scientific Reports |
| Volume | 11 |
| Pagination | 9 |
| Date Published | Mar |
| Type of Article | Article |
| ISBN Number | 2045-2322 |
| Accession Number | WOS:000626139100009 |
| Keywords | Science & Technology - Other Topics |
| Abstract | Carbon (C) plays an important role in maintaining soil fertility and increasing soil microbial community, but there is still limited information about how source utilization characteristics respond to soil fertility changes under double-cropping rice (Oryza sativa L.) system in southern China paddy field. Therefore, the effects of different short-term (5-years) tillage management on characteristics of C utilization in rice rhizosphere and non-rhizosphere soils under double-cropping rice field in southern China were investigated by using O-18 incorporation into DNA. Therefore, a field experiment were included four tillage treatments: conventional tillage with crop residue incorporation (CT), rotary tillage with crop residue incorporation (RT), no-tillage with crop residue retention (NT), rotary tillage with crop residue removed as control (RTO). The results showed that soil microbial biomass C content with CT, RT, NT treatments were increased by 29.71-47.27% and 3.77-21.30% in rhizosphere and non-rhizosphere soils, compared with RTO treatment, respectively. Compared with RTO treatment, soil microbial basal respiration and microbial growth rate with CT treatment were increased 30.56%, 30.94% and 11.91%, 12.34% in rhizosphere and non-rhizosphere soils, respectively. The soil microbial C utilization efficiency were promoted with NT treatment. Compared with RTO treatment, the metabolic capacity of soil microorganism to exogenous C source with CT, RT and NT treatments were increased. The largest type of exogenous C source was saccharides, followed by amino acid and polymers, and complex compounds was the smallest. The redundancy analysis results indicated that tillage treatments significantly changed the utilization characteristics of soil microorganism to exogenous C source. Compared with RTO treatment, the grain yield of early rice and late rice with CT treatment were increased by 409.5 kg ha(-1) and 387.0 kg ha(-1), respectively. Therefore, the CT and RT treatments could significantly increase soil microbial biomass C content, but the NT treatment promote microbial C utilization efficiency in the double-cropping paddy field of southern China.
|
| Short Title | Sci RepSci Rep |
| Alternate Journal | Sci Rep |
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Tang, Haiming Xiao, Xiaoping Li, Chao Shi, Lihong Cheng, Kaikai Li, Weiyan Wen, Li Xu, Yilan Wang, Ke
National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31872851]; Innovative Research Groups of the Natural Science Foundation of Hunan Province [2019JJ10003]
This study was supported by National Natural Science Foundation of China (31872851), Innovative Research Groups of the Natural Science Foundation of Hunan Province (2019JJ10003).
Nature research
Berlin
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