Journal of Resources and Ecology ›› 2020, Vol. 11 ›› Issue (3): 298-303.DOI: 10.5814/j.issn.1674-764X.2020.03.007

• Rangeland Ecosystem Function and Management • Previous Articles     Next Articles

A Meta-analysis of the Effects of Organic and Inorganic Fertilizers on the Soil Microbial Community

WANG Jiangwei1,2, ZHANG Guangyu1,2, YU Chengqun1,*()   

  1. 1. Lhasa Plateau Ecosystem Research Station, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
    2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2019-12-12 Accepted:2020-02-08 Online:2020-05-30 Published:2020-06-16
  • Contact: YU Chengqun
  • About author:WANG Jiangwei, E-mail: wangjw.15s@igsnrr.ac.cn
  • Supported by:
    The National Key Research and Development Program of China(2016YFC0502001);The National Key Research and Development Program of China(2016YFC0502005);The National Key Research and Development Program of China(2017YFA0604801);The Tibet Natural Science Foundation(XZ 2018 ZR G-141);The National Natural Science Foundation of China(31600432);The National Natural Science Foundation of China(41571042);The Tibet Science and Technology Major Projects of the Pratacultural Industry.

Abstract:

In order to investigate the general tendency of soil microbial community responses to fertilizers, a meta-analysis approach was used to synthesise observations on the effects of inorganic and organic fertilizer addition (N: nitrogen; P: phosphorus; NP: nitrogen and phosphorus; PK: phosphorus and potassium; NPK: nitrogen, phosphorus and potassium; OF: organic fertilizer; OF+NPK: organic fertilizer plus NPK) on soil microbial communities. Among the various studies, PK, NPK, OF and OF+NPK addition increased total phospholipid fatty acid (PLFA) by 52.0%, 19.5%, 334.3% and 58.3%, respectively; while NP, OF and OF+NPK addition increased fungi by 5.6%, 21.0% and 8.2%, respectively. NP, NPK and OF addition increased bacteria by 6.4%, 9.8% and 13.3%, respectively; while NP and NPK addition increased actinomycetes by 7.0% and 14.8%, respectively. Addition of ammonium nitrate rather than urea decreased gram-negative bacteria (G -). N addition increased total PLFA、bacteria and actinomycetes in croplands, but decreased fungi and bacteria in forests, and the F/B ratio in grasslands. NPK addition increased total PLFA in forests but not in croplands. The N addition rate was positively correlated with the effects of N addition on gram-positive bacteria (G +) and G -. Therefore, different fertilizers appear to have different effects on the soil microbial community. Organic fertilizers can have a greater positive effect on the soil microbial community than inorganic fertilizers. The effects of fertilizers on the soil microbial community varied with ecosystem types. The effect of N addition on the soil microbial community was related to both the forms of nitrogen that were added and the nitrogen addition rate.

Key words: ecosystem types, nitrogen addition rate, response ratio, soil PLFA