摘要

通过对沙雅绿洲耕地土壤微量元素的含量及空间变异特征研究。结果表明,土壤中Cu、Zn、Fe、Mn元素空间分布均属于中等变异;从土壤微量元素拟合的理论模型可知,Fe、Mn、Zn元素的最适合模型为球形模型,Cu元素的最适合模型为指数模型。其中Fe、Cu元素的拟合效果最理想,决定系数分别为0.714和0.918,Zn元素的拟合最差;土壤中Cu元素的块金值/基台值为42.8%,大于25%,表明具有中等的空间相关性,Fe、Mn、Zn元素的块金值/基台值均小于25%,系统具有强烈的空间相关性;Fe元素与土壤电导率(EC)成显著正相关,Cu元素与EC极显著正相关;Mn、Zn元素与有机质(OM)均成极显著正相关...

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