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Effects of a decade of organic fertilizer substitution on vegetable yield and soil phosphorus pools, phosphatase activities, and the microbial community in a greenhouse vegetable production system

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Journal of Integrative Agriculture 2022年第7期21卷 2119-2133页

作者： ZHANG Yin-jie GAO Wei LUAN Hao-an TANG Ji-wei LI Ruo-nan LI Ming-yue ZHANG Huai-zhi HUANG Shao-wen Key Laboratory of plant Nutrition and Fertilizer Ministry of Agriculture and Rural Affairs/Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081P.R.China Institute of Agricultural Resources and Environment Tianjin Academy of Agricultural SciencesTianjin 300192P.R.China College of Forestry Hebei Agricultural UniversityBaoding 071000P.R.China Institute of Agricultural Resources and Environment Hebei Academy of Agriculture and Forestry SciencesShijiazhuang 050051P.R.China

partial substitution of chemical fertilizers by organic amendments is adopted widely for promoting the availability of soil phosphorus(p)in agricultural ***,few studies have comprehensively evaluated the effects of longterm organic substitution on soil p availability and microbial activity in greenhouse vegetable fields.A 10-year(2009–2019)field experiment was carried out to investigate the impacts of organic fertilizer substitution on soil p pools,phosphatase activities and the microbial community,and identify factors that regulate these soil p transformation *** treatments included 100%chemical N fertilizer(4 CN),50%substitution of chemical N by manure(2 CN+2 MN),straw(2 CN+2 SN),and combined manure with straw(2 CN+1 MN+1 SN).Compared with the 4 CN treatment,organic substitution treatments increased celery and tomato yields by 6.9-13.8%and 8.6-18.1%,respectively,with the highest yields being in the 2 CN+1 MN+1 SN *** 10 years of fertilization,organic substitution treatments reduced total p and inorganic p accumulation,increased the concentrations of available p,organic p,and microbial biomass p,and promoted phosphatase activities(alkaline and acid phosphomonoesterase,phosphodiesterase,and phytase)and microbial growth in comparison with the 4 CN ***,organic substitution treatments significantly increased soil C/p,and the partial least squares path model(pLS-pM)revealed that the soil C/p ratio directly and significantly affected phosphatase activities and the microbial biomass and positively influenced soil p pools and vegetable *** least squares(pLS)regression demonstrated that arbuscular mycorrhizal fungi positively affected phosphatase *** results suggest that organic fertilizer substitution can promote soil p transformation and *** manure with straw was more effective than applying these materials separately for developing sustainable p management practices.

关键词： organic substitution management soil p pools phosphatase activity microbial community soil C/p pLS-pM

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