两种不同钾肥在马铃薯上应用效果的研究

盆栽试验结果表明，氯化钾和硫酸钾均能提高马铃薯叶绿素含量，块茎产量较对照增加显著。供试两种钾肥对马铃薯淀粉含量有增加作用，但对维生素C含量有降低趋势。田间试验结果表明，钾肥具有增加大、中薯，降低小薯比例的效果，从而提高商品率。在海伦黑土上，每公顷施氯化钾52．5～202．5kg，增产块茎6．8％～17．6％。在富锦黑粘土上，每公顷施等量的氯化钾，增产块茎6．5％～20．0％。

THE EFFECT OF TWO DIFFERENT KINDS OF POTASH FERTILIZERS ON POTATOES

Restlts of pot experiment showed that both potassium chloride and potassium sulphate had the same effect on increasing chlorophyll content in potato's leaves and they showed a significant effect on increasing tuber yield over that of control. The two kinds of potash showed the effect of increasing starch content , but it also showed the tendency of decreasing in vitamin C content. The field experiment showed that potash had the effect on increasing the ratio of large and medium tuber and decreasing on the ratio of small tuber both in number and weight, thus it increase the commodity rate. The field experiment on Hailun black soil showed that with potassium chloride (KCL ) application at the rate of 52. 5~ 202. 5kg/hm2,the tuber yield increased by 6. 8~ 17. 6%. With the same rate of KCL application on the smonite in Fujin, the yield increased by 6. 5~20. 0%.