Effects of Long-Term Fertilization Management Practices on Soil Microbial Biomass in China's Cropland: A Meta-Analysis
文献类型： 外文期刊
作者： Zhang, Qingping 1 ; Miao, Fuhong 2 ; Wang, Zhennan 3 ; Shen, Yuying 4 ; Wang, Guoliang 1 ;
作者机构： 1.Shandong Acad Agr Sci, Shandong Inst Agr Sustainable Dev, Minist Agr, Key Lab East China Urban Agr, Jinan 250100, Shandong, Peoples R China
2.Qingdao Agr Univ, Inst Econ Herb Plants, Qingdao 266109, Peoples R China
3.Linyi Univ, Coll Agr & Forestry Sci, Linyi 276000, Peoples R China
4.Coll Pastoral Agr Sci & Technol, State Key Lab Grassland Agroecosyst, Lanzhou 730020, Gansu, Peoples R China
期刊名称：AGRONOMY JOURNAL （ 影响因子：2.24； 五年影响因子：2.829 ）
ISSN： 0002-1962
年卷期： 2017 年 109 卷 4 期
页码：
收录情况： SCI
摘要： Soil microbial biomass (SMB) plays an important role in enhancing soil aggregation, promoting nutrient cycling, and making a substantial contribution to soil organic matter. Little is known about the underlying mechanism and broad-scale responses of SMB to long-term fertilization practices on a regional scale. The objective of this study is to characterize changes in SMB of predominant cropping systems in China (mainly producing maize [Zea mays L.], wheat [Triticum aestivum L.], rice [Oryza sativa L.], and soybean [Glycine max L.]) under different fertilization regimes using meta-analysis. We integrated data from more than 60 studies conducted in China from 1990 to 2015 and found that application of inorganic fertilizer, straw, straw with inorganic fertilizer, manure, and manure with inorganic fertilizer increased soil microbial biomass carbon (C-mic) concentration, while nitrogen-only (N) and nitrogen plus manure (NM) decreased soil microbial biomass nitrogen (N-mic) concentration compared with control (no fertilizer application). Our results indicated greater C-mic and N-mic responses to inorganic N, P, and K-based fertilizers plus manure (NPKM) in the mid-lati-tude region compared with those in the low- and high-latitude regions of China. The differences in means (C-mic or N-mic con-centration) among different fertilization treatments decreased with experimental duration, and N-mic concentration decreased with increase in N rate. Our results suggested that long-term (similar to 10 yr) continuous annual fertilization of N provided the greatest SMB, and the optimal rate was about 100 kg N ha(-1) yr(-1). The application of NPKM demonstrated the greatest potential for increasing SMB of major cropping systems in China.
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