高寒山区钾肥施用量对早熟马铃薯生长性状的影响及效益分析

Effects of Different Potassium Application Rate on Yield,Quality and Economic Benefits Analysis of Precocious Potato in High and Cold Mountainous Areas

为探索在高寒山区钾肥对早熟马铃薯产量、品质的影响,分析获得最佳经济效益的钾肥施用量,2008年在威宁县以极早熟品种"费乌瑞它"为供试材料,设置不同钾肥施用量的小区试验。结果表明,施用钾肥能够增加产量,每1kg钾肥可增产55.5～89.8kg;在一定范围内,随着钾肥施用量增加马铃薯块茎数、平均单株薯块重、粗淀粉、维生素C含量均呈增加趋势;在适量施用有机肥和氮磷肥基础上,能够获得较好效益的钾肥用量为K_2O 10kg·667m^(-2)。

To explore the effects of different potassium application rate on precocious potato yield and quality,analyzed the best economic efficiency on potassium fertilizer quantity,using the very early maturing variety of＂Favorite＂as materials,set up different potassium application rates of plot experiments in high and cold mountainous areas of Weining County.The results indicated that application a kilogram potassium fertilizer may increase production 55.5～89.8 kg;in a certain range,with the potassium fertilizer employment quantity increasing,the potato tuber number,average tuber weight of plant and stanch,vitamin C of potato content showed increasing trendence.In amount employment organic fertilizer and nitrogen phosphate fertilizer foundation,application of K_2O rate 10 kg·667 m^（-2） could obtain better economic benefit.