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用国产离子交换树脂膜室内埋置法提取测定了我国北方 2 4种土壤的速效钾含量。结果表明 ,用阳离子交换树脂膜提取的土壤钾与用 1m ol/L中性 N H4O A c及土壤养分综合系统评价方法提取的钾 ( A SI- K)分别呈显著和极显著的正相关 ;与盆栽试验不施钾处理玉米幼苗吸钾量呈极显著的正相关 ,明显高于常用的 1m ol/L中性 N H4OA c提取钾与盆栽试验玉米幼苗吸钾量之间的相关性。说明可以用国产离子交换树脂膜较好地评价北方土壤的供钾能力。
The contents of available potassium in 24 soil samples from the northern part of China were determined by using the domestic ion exchange resin membrane in-situ method. The results showed that soil potassium extracted by cation exchange resin membrane had a significant and highly significant positive correlation with potassium (A SI-K) extracted with 1 mol / L neutral N H4O A c and soil nutrient comprehensive evaluation system respectively. There was a significant positive correlation between potassium uptake and potassium uptake by maize seedlings under pot experiment. It was significantly higher than the correlation between potassium uptake by 1 mol / L neutral N H4OA c and potassium uptake by potted maize seedlings. Explain that the domestic ion exchange resin membrane can be used to better evaluate the potassium supply capacity of the northern soil.