叶面喷施硝酸钾和硝酸钙对马铃薯产量的影响

Effect of foliar spraying KNO_3 and Ca(NO_3)_2 on yield of potato

通过叶面喷施硝酸钾和硝酸钙试验,研究钙钾肥配合施用的效果及其对马铃薯产量的影响.结果表明:叶面单喷硝酸钙397g/666.7m2或硝酸钾382g/666.7m2,共4次,效果最好,产量分别为1 096.3、1 210.5kg/666.7m2.硝酸钙与硝酸钾肥配合施用的最佳组合是硝酸钙310g/666.7m2、硝酸钾239g/666.7m2,产量为1 273kg/666.7m2.

The aim was to investigate the effects of foliar spraying KNOa and Ca（NO3）2 combination on yield of potato. It was discovered that using 397 g/666.7 m2 Ca（NO3）2 or 382 g/666.7 m2 KNO3 every time in total of four had obvious effects yield of potato, was 1 096.3 kg/666.7 m2 and 1 210.5 kg/666.7 m2. The optimal combination was 310 g/666.7 m2 Ca（NO3）2 and 239 g/666.7 m2 KNO3 ,the yield of potato was 1 273 kg/666.7 m2.