Ca—K型斜发沸石对盐化土壤速效钾的影响

采用微型盆栽和大田试验，研究了赤城产Ｃａ－Ｋ型斜发沸石对盐化土壤有效钾的影响，以及斜发沸石在盐化土壤的供钾能力和后效。结果表明：土壤速效钾含量随沸石施用量的增加而增加；土壤中施入铵态氮肥能促进沸石中钾的释出；将沸石一次 施入盐化潮土中，在４ａ内土壤速效钾可增加５％～２５％。显然，Ｃａ－Ｋ型斜发沸石对土壤钾的供应具有调控作用。

The Effect of Ca-K Clinoptilotite on Available Potassium in Salinized Soil

The effect of Ca-K clinoptilolite on available potassium in salinized soil and its subsequent effect were studied with mini-pot trail and field trail. The results showed that the content of available potassium in soil increased with clinoptilolite application increase. Ammonium nitrogen fertilizer (N H4HCO3) could promote the clinoptilolite releasing potassium. When clinoplilolite was applied in salinized soil, available potassium continuiously increased from 5% to 25% during the four years test. It was obvious that Ca-K clinoptilolite could adjust and control potassium supply.