【摘要】 用常规方法、M3法和ASI法提取测定重庆农业土壤中有效微量元素铜、锌、铁、锰的含量,经相关分析得出:M3法提取的有效铜、锌、铁与常规方法测定值均呈极显著相关,相关系数分别为r铜=0.471**(n=32),r锌=0.471**(n=32),r铁=0.748**(n=32);有效锰无正相关关系.ASI法提取的有效铜、锌、铁、锰与常规方法测定值均呈极显著相关,相关系数分别为r铜=0.919**(n=32),r锌=0.823**(n=32),r铁=0.757**(n=32),r锰=0.899**(n=32).通过假设检验,M3法与常规方法、ASI法与常规方法均只有铜测定值差异不显著.更多还原

【Abstract】 Available Cu,Zn,Fe and Mn in agricultural soil in Chongqing were measured with conventional,Mehlich3 and ASI methods.The results showed that the contents of available Cu,Zn and Fe measured with the M3 method were in highly significant correlation with those measured by the conventional method,the correlation coefficients were rCu=0.471**(n=32),rZn=0.471**(n=32),rFe=0.748**(n=32).The correlation of available Cu,Zn,Fe and Mn measured with the ASI method were highly significant with those obtained with the conventional method,the correlation coefficients being rCu=0.919**(n=32),rZn=0.823**(n=32),rFe=0.757**(n=32),rMn=0.899**(n=32).Through t test,the numerical values of Cu measured with the three methods were not significantly different.更多还原