结果表明，供试土壤非交换性钾释放特性和有效性与粘土矿物密切相关。

The results showed that the releasing characteristics and availability ofnonexchangeable K related remarkably to clay minerals.

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在不同钾水平条件下，它们吸收利用土壤中的钾大部分来自非交换性钾源，其中矿物钾差异比较显著。

For different K levels, the most part of K absorbed by wheat is obtained from non exchangeable sources, among which the difference for mineral potassium is of relatively more significant.

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