【作者】 高怀友； 师荣光； 赵玉杰；

【Author】 GAO Huai-you, SHI Rong-guang, ZHAO Yu-jie (Agro-environmental Protection Institue, MOA, Tianjin 300191,China)

【机构】 农业部环境保护科研监测所；

【摘要】 以全国重点区域土壤环境质量数据库为数据源,依据pH值、有机质含量、阳离子交换量筛选出时间、空间分布不连续的3组402个土壤样品,对土壤中Cu有效态含量与全量的相关性进行了统计分析。结果表明,在pH值5～6.5与有机质含量1%～2.5%、pH值5～6.5与有机质含量2.5%～4%、pH值7.5～8.5与有机质含量1%～2.5%的土壤条件下(阳离子交换量均为15～30cmol(+)/kg),土壤中的Cu有效态含量与全量之间均存在显著的相关性,相关系数分别为0.681,0.694,0.617;以上3种土壤条件下均能在Cu有效态含量与全量之间建立起有意义的回归方程,分别为:Y=8.409-0.558X+0.019X2(R2=0.492,p<0.001),Y=e(2.902―29.884/x)(R2=0.518,p<0.001),Y=9.011-1.206x+0.059X2-0.001X3(R2=0.535,p<0.001)。相对人工控制条件下的盆栽试验而言,本研究中的回归方程来自自然条件下的大样本田间统计,对农业生产更具指导意义。更多还原

【Abstract】 In this paper, the relativity between available Cu and total Cu concentration in soil were analysed , 402 soil samples in 3 teams with non-continous spatio-temporal distribution were selected from the typical region soil environmental quality database according to pH, organic matter concentration(OMC), CEC. The results showed that under the soil condition of pH 5~6.5 and OMC 1%~2.5% , pH 5~6.5 and OMC 2.5%~4%, pH 7.5~8.5 and OMC 1%~2.5% ( CEC 15~30 cmol (+)/kg), there were evident correlation between soil available Cu content and total Cu content, r= 0.681,0.694,0.617. Under the forenamed 3 soil conditions the curvilinear regression function based on available content and total content could be defined, Y=8.409-0.558X+0.019X(2R2=0.492,p<0.001=,y=e(2.902―29.884/x()R2=0.518,p<0.001=,Y=9.011-1.206x+0.059X2-0.001X(3R2=0.535,p<0.001). Compared with potting experimental results, the forenamed regression functions were more significative for agriculture.更多还原