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董积忠;段荣庭
摘要: 试验表明,土壤有效钾含量108~200 mg/kg条件下,每公顷棉田施硫酸钾60 kg,土壤有效钾亏损20 mg/kg;每公顷施硫酸钾120 kg,土壤有效钾保持平衡不亏损;每公顷施硫酸钾180 kg,土壤有效钾增加4 mg/kg.补施钾肥增产效果明显,经济效益显著.
董积忠;段荣庭. 喀什土壤棉田补钾培肥效果及补钾措施[J]. .
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