马铃薯是需钾量大的作物之一 ,施用钾施有显著的增产效果。本试验进一步明确不同土壤施用钾肥对马铃薯的增产效果 ,以及合理用量。试验结果表明 ,不同土壤类型的不同钾肥用量均能起到有效增产作用 ,在 6 6 7m2 施钾低于 2 2 5kg时 ,随施钾量的增加而增产幅度提高 ,施钾量超过2 2 5kg时 ,则马铃薯产量随钾增加而下降 Potato is one of the crops that needs a large amount of potassium. The application of potassium has a significant yield-increasing effect. This experiment further clarified the effect of potash application on the yield of potatoes by different soil application and the reasonable dosage. The results showed that different potash fertilizer application rates could all increase the yield effectively. When the potash fertilizer application rate of 6 6 7m 2 was less than 225 kg, the increase rate of yield increased with the increase of the potash application rate, and the potash application rate exceeded 225 kg , Then the potato yield decreases with increasing potassium