不同施肥模式对青浦行道树土壤理化性质和微生物的影响
The Impact on Soil Physical and Chemical Properties and Microorganisms with Different Pattern of Fertilizering Avenue Tree in Qingpu District

针对行道树的生长现状，对青浦行道树采用不同模式施肥，并对土壤的理化性质和微生物进行测定。结果表明：不同的施肥模式对行道树土壤的影响不同。木酢液在短期内对土壤的pH值有一定的调节作用，对土壤的其它理化性质和微生物的影响较小。同时，有机肥、生物肥和菌根菌，在短期内对土壤密度、土壤pH值和EC值影响不大，对土壤的有机质、水解性氮、微生物含量影响较大。持续两年后，可降低土壤密度和pH值，显著地增加土壤有机质和水解氮的含量，尤其是土壤中的微生物含量。四种不同施肥模式中，有机肥模式能显著增加土壤中的有机质，水解氮的含量，菌根菌能显著地增加土壤中微生物中细菌、真菌和放线菌的含量。持续两年施肥对土壤理化性质和微生物的影响效果强于施肥一年对土壤理化性质和微生物的影响。
Aiming at the present condition of the growth of the avenue trees in Qingpu district, we take fertilization of the trees in different modes. Before and after fertilization on the soil, we check the physical and chemical properties and microorganisms. The results showed that different fertilization pattern is different influence on the soil. Wood vinegar in the short term has certain regulation effect to the soil pH, and produces a little influence on physical and chemical properties and microorgan-isms. Meantime, the organic fertilizer, biological fertilizer and mycorrhizal fungi have a litter effect to the soil density, soil pH and EC value, but have a larger influence to hydrolysis of soil organic matter, hydrolysis nitrogen, and microbial content. After two years, the soil density and pH value are reduced; soil organic matter and hydrolysis nitrogen content, especially the content of soil microbes are significantly increased. In the midst of four different fertilization patterns, the organic fertilizer model can significantly increase the content of the soil organic matter, hydrolyze nitrogen, and can significantly increase the content of the soil microbes in the amount of bacteria, the fungi mycorrhizal fungi and actinomycetes. The effect of physical and chemical properties and microbial is stronger holding two year fertilizer application on soil than one year.