Interaction of soil microbial communities and phosphorus fractions under long-term fertilization in paddy soil

Journal of Integrative Agriculture

Waqas AHMED¹  Lu ZHANG²  Jing HUANG³  Hui-min ZHANG⁴  Jiang-xue DU⁵  Qing-hai HUANG⁵  Sehrish ALI⁵  Kai-lou LIU⁵  Muhammad QASWAR⁵  Hafeez UR-RAHIM⁵  Tian-fu HAN⁶ 

[1] Department of Environment, Faculty of Bioscience Engineering, Ghent University, Ghent 9000, Belgium;National Observation Station of Qiyang Agri-ecology System/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Qiyang 426182, P.R.China;Guangdong Provincial Key Laboratory for Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, P.R.China;Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education/School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, P.R.China;National Engineering Laboratory for Improving Quality of Arable Land/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China;National Engineering and Technology Research Center for Red Soil Improvement/Jiangxi Institute of Red Soil, Nanchang 331717, P.R.China;

关键词: enzyme activities;    long-term fertilization;    microbial community;    microbial biomass;    phosphorus fraction;   

DOI  :  

来源: DOAJ

【 摘 要 】

Understanding the impact of biological activities on the soil phosphorus (P) distribution under long-term fertilizer application can facilitate better soil P fertility management. Therefore, the primary objectives of this study were to investigate the effect of long-term (since 1981) fertilizer application on the soil P fractions and microbial community and to evaluate correlations between the microbial community structure and P distribution. The following treatments were implemented in a long-term field trial: no fertilization (CK), inorganic N and K (NK), inorganic P and K (PK), inorganic N, P and K (NPK) and manure+NPK (MNPK) fertilization. The study showed that the soil pH, soil organic carbon and total and available N and P concentrations were considerably higher in the MNPK treatment than in the CK treatment. The soil microbial biomass C, N and P concentrations were also significantly higher in the MNPK treatment than in the CK treatment. Among fertilization treatments, the β-1,4-glucosidase, α-1,4-glucosidase, urease, acid phosphatase and phosphodiesterase activities were the highest in the MNPK treatment. Compared to inorganic fertilization, the MNPK treatment increased the labile soil P fractions and decreased the residual soil P concentration. Continuous fertilization significantly affected the soil microbial composition. The total phospholipid fatty acid (PLFA) concentrations in the NK, PK, NPK and MNPK treatments were 23.3, 43.1, 48.7 and 87.7% higher, respectively, than in the CK treatment. A significant correlation was observed between the microbial community and soil P fractions. Moreover, the aggregated boosted tree (ABT) model showed that among the various soil biochemical properties, the total PLFA concentration was the factor that most influenced the active P pool, accounting for 35.4% of the relative influence of all soil biochemical properties examined. These findings reveal that combined manure and inorganic fertilizer application is a better approach than applying inorganic fertilizer alone for sustaining long-term P fertility by mediating soil biological activity.

【 授权许可】

Unknown