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Chinese Agricultural Science Bulletin ›› 2023, Vol. 39 ›› Issue (3): 88-96.doi: 10.11924/j.issn.1000-6850.casb2022-0167

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Effects of Organic Fertilizers on Soil Microbial Community Characteristics: Research Progress

HUANG Yingbo1,2(), LUO Fan1,2, GONG Xuejiao1,2(), WANG Yinchun1, LI Lanying1, LIU Dongna1, YAO Yu1   

  1. 1 Tea Research Institute of Sichuan Academy of Agricultural Sciences, Chengdu 610066
    2 Ya’an Observation and Experiment Station of National Soil Quality, Ya’an, Sichuan 6255014
  • Received:2022-03-09 Revised:2022-06-03 Online:2023-01-25 Published:2023-02-01

Abstract:

Soil microorganism is the key index to evaluate soil health. In agricultural production, fertilization improves soil fertility and crop yield, and also profoundly changes the living environment of soil microorganisms. Under the fundamental national policy of agricultural production development and promotion of organic fertilizers, studying the effects of organic fertilizers on soil microorganisms is conducive to a comprehensive and objective evaluation of the significance of organic fertilizers to soil health. Since the 1970s and 1980s, China has arranged a number of long-term positioning fertilization experiments for different soil types and land use types, which provided data support for studying the influence of organic fertilizers on soil microbial community structure and diversity. Based on these research results, this paper analyzed the development trend of soil microbial research and environmental factors, expounded the positive effects of organic fertilizers on improving soil microbial biomass and constructing community structure, and discussed the impact of organic fertilizers on the functional diversity of soil microbial community. In general, organic fertilizers can change the diversity and carbon utilization characteristics of soil microbial community, and play an important role in maintaining microbial metabolic function and the stability of soil ecosystem. Organic fertilizers improve the ratio of soil bacteria to fungi, increase the abundance of functional microbial communities such as archaea, nitrogen fixing microorganisms and ammonia oxidizing microorganisms, and inhibit the activity of soil pathogens, so as to improve the activity of soil carbon and nitrogen metabolism and maintain soil health. The way of constructing soil microbial community structure by organic fertilizers is mainly to cause the changes of soil pH, nutrient content, aggregate structure, enzyme activity and other physical and chemical properties, as well as the effects of exogenous microorganisms, antibiotics and heavy metals on the characteristics of soil microbial community. Therefore, soil conditions, crop types and fertilizer types should be comprehensively considered when applying organic fertilizers. In the future, we can deeply explore the functional characteristics and action mechanism of microbial communities through new biotechnology, develop safe and efficient new microbial fertilizer products, and give full play to the role of soil microorganisms in the green development of agriculture. In addition, we should pay attention to the development and verification of soil microbial indicators, and carry out the research on evaluation system of soil health deeply.

Key words: organic fertilizer, soil health, soil microorganism, microbial community structure, functional diversity