农业环境科学学报2016，Vol.35Issue(11)：2123-2130,8.DOI:10.11654/jaes.2016-0674
有机肥中重金属对菜田土壤微生物群落代谢的影响
Effects of heavy metal within organic fertilizers on the microbial community metabolic profile of a vegetable soil after land application
摘要
Abstract
This study investigated the effect of heavy metals in organic fertilizer on the metabolic characteristics of soil microbial community on the basis of a vegetable fertilization experiment, which was carried out in Zhangqi Town, Cixi City. Vegetable planting and fertilization were performed twice each year. Three fertilization treatments were included:CK treatment with no fertilizer; T1 treatment with a manure fertilizer having heavy metal levels within the safe limit set by China;T2 treatment with a manure fertilizer having an increased level of Pb, As, Cu and Zn. After two years, soil physic-chemical properties, soil heavy metals and metabolic characteristic of soil microbial community were measured by using both conventional soil analysis method and MicroRESPTM technology. Results indicated that both T1 and T2 signifi-cantly increased the soil content of organic matter, available phosphorus and available potassium. Although there is insignificant differencein soil physic-chemical properties between T1 and T2, T2 had significantly higher contents of total Cu, total Zn, available Cu, available Zn and available As in soil. Microbial community metabolic profile analysis based on the MicroRESPTM method showed that T1 significantly en-hanced the basal respiration and the functional diversity of microbial community in soil;but T2 did not show similar enhancement. Thus, the increased level of Cu, Zn and available As in T2 soil might reduce the positive effect of nutrients within manure on soil microbial communi-ty. Principle component analysis and cluster analysis results further showed that the community level physiological profile(CLPP)in T1 soil was apparently different from that in T2 soil. The highly accumulated heavy metals and their increased availability in T2 soil enhanced the utilization of citric acid, malic acid and oxalic acid in soil. In conclusion, the effect of manure fertilizer on the metabolic function of soil mi-crobial community was related to both manure nutrients and its residual heavy metal. The application of manure fertilizer with excessive residual heavy metal would change the effect of manure nutrients on soil microbial community.关键词
畜禽粪便/有机肥/菜田土壤/重金属/土壤微生物群落功能Key words
livestock manure/organic fertilizer/vegetable soil/heavy metal/soil microbial community function分类
农业科技引用本文复制引用
林辉,孙万春,王飞,王斌,翁颖,马军伟,符建荣..有机肥中重金属对菜田土壤微生物群落代谢的影响[J].农业环境科学学报,2016,35(11):2123-2130,8.基金项目
浙江省自然科学基金项目（LY14C150002）；宁波市科技计划项目（2013C11024）；2013年鄞州区省农科院合作项目 （）
公益性行业（农业）专项 （）
