不同钾肥品种及用量对马铃薯产量和品质的影响  

Effects of Different Sources and Rates of Potassium Fertilizer on Potato Yield and Quality

作　　者：秦鱼生[1] 涂仕华[1] 冯文强[1] 孙锡发[1] 廖鸣兰[1] 

机构地区：[1]四川省农业科学院土壤肥料研究所,四川成都610066

出　　处：《西南农业学报》2010年第6期1950-1954,共5页Southwest China Journal of Agricultural Sciences

基　　金：国家科技支撑计划(2008BADA4B10);国际植物营养研究所(IPNI)项目共同资助

摘　　要：本文通过大田试验,研究了不同钾肥品种及用量对马铃薯产量性状、产量、品质及经济效益的影响。研究结果表明:氯化钾和硫酸钾用量的增大都显著增加马铃薯的各种产量构成因素和产量,提高马铃薯品质。在试验设计的钾肥用量水平下,硫酸钾和氯化钾对马铃薯产量的作用并无显著差异,而在马铃薯产量构成因素上差异明显,硫酸钾处理的商品薯率显著高于氯化钾处理,而单株块茎数显著低于氯化钾处理。高钾水平下,氯化钾处理较硫酸钾处理淀粉和维生素C含量更高,还原糖含量更低。3个钾肥水平下,氯化钾处理的净效益增加值和钾肥经济效益都比硫酸钾处理多,施用210 kg/hm2K2O时,马铃薯经济效益最高。In this article,a field experiment was conducted to study effects of different sources and rates of potassium fertilizer on physical and commercial properties of the potato tuber,yields,quality and profit of potato.Results showed that the physical and commercial properties of the potato tuber were significantly improved;yield and quality of potato were remarkably increased with an increase in K rates regardless of the K sources.No significant difference in yields between potassium chloride（KCl） and potassium sulfate（K2SO4） was observed,however,the percent of commercial potato was improved but tubers per plant were reduced by K2SO4.Contents of starch and vitamin C in the potato were enhanced but reducing sugar was reduced by the high rate of KCl.In terms of economic returns,KCl was superior to K2SO4 with the highest net income obtained at 210 kg /hm2 K2O.

关 键 词：马铃薯 钾肥 产量 品质 经济效益 

分 类 号：S532.061[农业科学—作物学] S147.22