The microbial cycling of phosphorus on long-term fertilized soil: Insights from phosphate oxygen isotope ratios
文献类型：期刊论文
| 作者 | Zhang, Jia-Bao; Zhu, Yong-Guan; Jaisi, Deb P.; Zheng, Bang-Xiao; Bi, Qing-Fang; Lin, Xian-Yong; Li, Ke-Jie; Liu, Xi-Peng; Hao, Xiu-Li; Zhang, Han |
| 刊名 | CHEMICAL GEOLOGY
 |
| 出版日期 | 2018-04-20 |
| 卷号 | 483页码:56-64 |
| 关键词 | Stable oxygen isotopes Phosphorus turnover Microbial mobilization Long-term fertilization |
| ISSN号 | 0009-2541 |
| 文献子类 | Article |
| 英文摘要 | Microorganisms mobilize phosphorus (P) from soil and make it available for plants. However, the role of microbial activity in soil P dynamics especially among different P pools is poorly understood largely due to methodological limitations. In this study, we analyzed the oxygen isotope ratios in phosphate (delta(OP)-O-18) of sequentially extracted inorganic P (P-i) pools (H2O-P-i, NaHCO3-P-i, NaOH-P-i, and HCl-P-i) in a long-term agricultural research field in Henan, China with different fertilization histories and coupled with soil enzyme activity and P-cycling bacteria gene abundance studies. Results showed the dominant enzymes were alkaline phosphatase (APase) and phosphodiesterase (PDE), and the functional genes for P-cycling were bpp, cphy, phoX and pqqC. After long-term P fertilization, the delta(OP)-O-18 values of H2O-P-i, NaHCO3-P-i and NaOH-P-i pools approached to or achieved equilibrium, suggesting that the externally applied P was actively mobilized and cycled by soil microorganisms and speciated into different P pools. Based on the extent of isotope excursion among different Pi pools, the equilibrium fractionation oriented the source signature in the NaHCO3-P-i and NaOH-P-i pools, and HCl-P-i pool could be derived from P fertilizer but through multistep reactions, and mixed with the HCl-P-i from rock weathering product, which constituted HCl-P-i pool in the non-P treatments. Overall, the long-term P fertilization especially the balanced fertilization with nitrogen (N), P and potassium (K) was found to be beneficial for extensive utilization of soil P with abundant biological uptake and cell-internal P-i cycling. Variation partitioning analysis (VPA) indicated that the expression of functional genes may be stimulated to mobilize soil P under specific P pools distribution in this alkaline environment. Overall, our findings provide new insights to understand the roles of microbial activities in soil P biogeochemistry that are useful for agricultural P sustainability. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/41230]  |
| 专题 | 生态环境研究中心_土壤环境科学实验室 |
| 推荐引用方式 GB/T 7714 | Zhang, Jia-Bao,Zhu, Yong-Guan,Jaisi, Deb P.,et al. The microbial cycling of phosphorus on long-term fertilized soil: Insights from phosphate oxygen isotope ratios[J]. CHEMICAL GEOLOGY,2018,483:56-64. |
| APA | Zhang, Jia-Bao.,Zhu, Yong-Guan.,Jaisi, Deb P..,Zheng, Bang-Xiao.,Bi, Qing-Fang.,...&Zhang, Han.(2018).The microbial cycling of phosphorus on long-term fertilized soil: Insights from phosphate oxygen isotope ratios.CHEMICAL GEOLOGY,483,56-64. |
| MLA | Zhang, Jia-Bao,et al."The microbial cycling of phosphorus on long-term fertilized soil: Insights from phosphate oxygen isotope ratios".CHEMICAL GEOLOGY 483(2018):56-64. |
入库方式： OAI收割
来源：生态环境研究中心
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