摘要
为了解长期施用猪场废水对农田土壤Zn和Cu的影响,应用GIS结合地统计学方法对河北省京安猪场区域农田的清洁区和灌溉8年猪场废水的污灌区耕层(0～20cm)共52个土壤样品的Zn和Cu的全量和有效态含量的空间结构和分布特征进行了分析。结果表明,Zn和Cu的全量和有效态量受随机性和结构性影响,其中,有效Zn和全Cu以随机性影响为主,全Zn和有效Cu受结构性影响为主。Zn和Cu有效态含量分别与全量正相关,与全氮、有效氮、全磷和有效磷正相关,与pH负相关,与有机质相关不明显。从空间分布来看,Zn和Cu全量和有效态含量主要为果园>污灌地>机井地>林地和苜蓿地。根据背景调查、变异函数分析、Kriging内插图分析和不同采样区Zn和Cu含量统计分析,影响整个研究区土壤Zn和Cu分布的主要随机性因素为猪场废水的应用,长期灌溉猪场废水会带来土壤Zn和Cu积累,以及Zn和Cu有效态含量的增加。
Spatial variability of heavy metal in the plough layer （0-20 cm） of groundwater-irrigation farmland soils and sewage-irrigation farmland soils which had been applied swine wastewater from Jing an swine-farm for 8 years was studied using geographic information system （GIS） technique and geostatistical analysis, to analyze the effects of long-term swine wastewater applied on Zn and Cu in soils. 52 soil samples were collected and analyzed in terms of the total concentration and bio-available concentration of Zn and Cu, pH and the contents of soil nutrients. The results indicated that the spatial variability of the total concentration and bio-available concentration of Zn and Cu were impacted by random factors and structural factors together, bio-available Zn and total Cu were dominated by random factors, and total Zn and bio-available Cu were primarily controlled by structural factors. Bio-available Zn and bio-available Cu positively correlated to total Zn and total Cu respectively, positively correlated to total nitrogen, bio-available nitrogen, total phosphor and bio-available phosphor, but negatively correlated to pH, and correlated to organic matter insignificantly. The statistics analysis of Zn and Cu in soil from different samples and map of ordinary Kriging interpolation revealed that the total concentration and bio-available concentration of Zn and Cu were： orchard soil〉 sewage soil〉soil irrigated with groundwater〉woodland and clover-land. According to the analysis of background investigation, the variogram, the value of the total concentration and bio-available concentration of Zn and Cu in different samples and the map of ordinary Kriging interpolation, the main random factor influencing the distribution of Zn and Cu in soils in this region was swine wastewater applied. The Zn and Cu would be accumulated and the bio-available concentration of Zn and Cu would be increased in soils if the swine wastewater was long-term applied in this region.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2008年第1期126-132,共7页
Journal of Agro-Environment Science
基金
土壤有机质提升试点补帖项目(1251610721336-0706)
国家高技术研究发展专项"863"经费资助(2006AA10Z242)
关键词
猪场废水
污水灌溉
农田土壤
重金属
空间变异
swine wastewater
sewage-irrlgation
farmland soil
heavy metal
spatial variability
作者简介
黄治平（1972-），男，江西省人，博士研究生，研究方向为畜禽环境污染。E-mail：bjhuangzp@126．com
通信作者：徐斌,E-mail：xubin@mail．caas．net.cn
