洋芋是曲靖地区的主要粮食作物之一,常年种植面积在100万亩左右,是山区和一些半山区群众的重要食粮和牲畜饲料,也是他们日常生活的蔬菜品种之一。可是单产一直较低。1982年起,我区在洋芋上进行增施硫酸钾(以下简称施钾)的试验、示范和推广工作。效果显著。 1985年示范推广927915亩,施钾比不施每亩增产洋芋5526斤,计19.1％。折合人民币19.34元,扣除平均亩施硫酸钾25斤的成本4.88元、净增收入14.46元。考种结果还表明:施钾的洋芋大于150克的大薯比不施钾肥的增20.5％,75～150克的中薯增6.2％。 Potato is one of the staple food crops in Qujing. Its perennial planting area is about 1 million mu. It is an important food and livestock feed for the people in the mountainous area and some semi-mountainous areas. It is also one of the vegetable varieties in their daily life. However, yields have been lower. Since 1982, our district has experimented, demonstrated and popularized the application of potassium sulfate (hereinafter referred to as potassium) on potato. Significant effect. Demonstration and promotion of 927,915 mu in 1985, K than do not impose an additional yield of 5526 pounds per mu potato, accounting for 19.1%. Equivalent to 19.34 yuan, after deducting an average of 25 kilograms of potassium per kilogram of the cost of 4.88 yuan, a net income of 14.46 yuan. Test results also showed that: Potato potash greater than 150 grams of potash than the non-potassium fertilizer by 20.5%, 75-150 grams of potato by 6.2%.