【摘要】 为研究在固定施肥模式下速效钾的累积量的变化,采用回归旋转组合设计实施试验,建立了松嫩平原黑土区土壤速效钾与农肥,化肥和秸秆为实验因子的数学模型,结果表明,要使每667m2速效钾保持在适宜的230～270mg/kg水平上,应在5年中施用农肥832～1121kg,化肥34～947.8kg,秸杆93～122kg。更多还原

【Abstract】 In order to investigate the variety of available potassium accumulation under immobile fertilization, a mathematical model which take available potassium accumulation of soil in the blackland of Songnen plain, manure, fertilizer and straw as experiment factors was established. The results showed if keep the accumulation of available potassium in 230~270 mg/kg, the employ of manure, fertilizer, straw in five years should be 832~1120 kg, 34~947.8 kg, 93~122 kg in every 667 m2.更多还原