长期不同施肥处理下有机质含量变化对土壤中多环芳烃降解的影响——以太湖地区黄泥土长期试验为例  

Effects of the Content of Organic Matter on the Degradation of PAHs:A Case of a Paddy Soil Under a Long-term Fertilization Trial from the Tai Lake Region,China

作　　者：韩晓君[1] 潘根兴[1] 李恋卿[1] 

机构地区：[1]南京农业大学农业资源与生态环境研究所,江苏南京210095

出　　处：《农业环境科学学报》2009年第12期2533-2539,共7页Journal of Agro-Environment Science

摘　　要：采集太湖地区一个水稻土长期肥料试验定位监测田[化肥与秸秆配施(CFS)、化肥与猪粪配施(CFM)、单施化肥(CF)和不施肥(NF)]表层(0～15cm)土壤样品,用高效液相色谱测定了原土中16种多环芳烃(PAHs)含量和培养下外加芘的含量变化。结果显示,无论是PAHs的土壤本底含量还是培养下外加芘残留量,在不同施肥处理间均呈现显著差异;相对于单施化肥(CF),化肥与有机肥配施下PAHs土壤降解能力显著提高。统计分析表明,增强的有机污染物降解能力与土壤有机质含量变化及其带来的微生物活性的变化有关。因此,长期实行有机无机配施有利于增强土壤的环境功能,促进生态系统健康。In this paper we studied the four long-term fertilizer treatments of paddy soil,Taihu Lake region.The treatments include chemical fertilizer with straw return （ CFS ）,chemical fertilizer plus pig manure （ CFM ） ,chemical fertilizers only （ CF ）and no fertilizer application （ NF ）. The soil was sampled from O-15 cm.This study measured the content of the original 16 kinds of polyeyclic aromatic hydrocarbons（ PAHs ）and residues of spiked pyrene in soil,using high-performance liquid chromatography.The results showed that the content of both the PAHs and residues of spiked pyrene in the soil had obvious differences among different treatments.Compared to CF, long-term fertilization regimes im- proved the degradation of PAHs significantly.Statistical analysis showed that the enhanced ability of organic pollutants degradation related to changes of organic matter and microbial activity.Therefore,long-term fertilization regimes may strengthen the environmental functions of soil, and promote ecosystem health.

关 键 词：长期试验 施肥处理 多环芳烃 污染物降解 有机质 

分 类 号：X53[环境科学与工程—环境工程]