【摘要】 我省六种土壤上的177个水稻钾肥田间试验结果表明:大部分类型土壤上施用钾肥均有良好的增产效果,其趋势是酸性紫色土>潮土>黄泥>中性紫色土>碱性紫色土。施钾效果大小与土壤钾素含量密切相关（有效钾（K）y=64.4-0.424x r=-0.569,迟效钾y=58.5-0.092x r=-0.576）,土壤有效钾含量在60ppm、缓效钾180ppm以下时,施用钾肥效果明显。我省大部分土壤的适宜施钾量为K₂O3～6公斤/亩,施用农家肥能缓解土壤钾素的亏损和水稻对钾的需要。更多还原

【Abstract】 The results of 177 field experiments on 6 soils showed that, on most soils in Sichuan, the effect of potash fertilizer application on increasing yield in rice was significant and was closely related to the potassium content in soil(available K: Y = 64.4 - 0.424X,r = -0.569; slowly available K: Y = 58.5-0.092X, r=-0.576).The effect of potash fertilizer was significant if the content of available K Was under 60 ppm, or slowly available K under 180 ppm.The general trend for the effect of potash fertilizer application on increasing yield was in acid purple soil>alluvial soil >yellow soil>neutral purple soil>calcium purple soil.The farm manure could overcome the potassium deficiency in soils and satisfy the potassium need of rice.更多还原