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１前言在马铃薯的生长发育过程中，Ｎ、Ｐ、Ｋ的吸收比例大致为２．５∶１∶４．５，由此可见钾肥对马铃薯的产量和品质有着至关重要的影响。本试验主要研究马铃薯不同生育时期施用钾肥的效果，以找出既能增产又能保证钾肥供求平衡的途径。２材料与方法本试验于１９９９～２０?
1 Introduction In the process of potato growth and development, N, P, K absorption ratio of about 2.5: 1: 4.5, we can see that potash on potato yield and quality have a crucial impact. The main purpose of this experiment is to study the effect of potash application at different growth stages in order to find a way to increase both yield and supply balance of potash fertilizer. 2 Materials and Methods The test in 1999 ~ 20?