一、增施钾肥。马铃薯是需钾量较大的高产作物,从平南县近年的试验结果看,凡施用钾肥的马铃薯均表现叶色浓绿、株高、茎粗、长势旺盛,封行提早,大中薯比例高的特点。钾肥一般作茎肥早施效果为好。二、施用镁肥。马铃薯对镁肥比较敏感。广西的红壤土、砂质壤土等酸性土壤所含的有效镁一般都很低,应重视施镁肥。镁肥一般在出苗后20天和40天喷施为好,亩 First, increase potash. Potato is a high-yielding crop with a large amount of potassium. According to the test results of Pingnan County in recent years, the potatoes with potash showed dark green leaves, strong plant height, thick stems, strong growth, early closure of potatoes, High characteristics. Potash fertilizer generally used as a good early effect. Second, the application of magnesium fertilizer. Potato is more sensitive to magnesium fertilizer. Guangxi red soil, sandy loam and other acidic soil contains generally effective magnesium is very low, should pay attention to the application of magnesium fertilizer. Magnesium fertilizer generally 20 days after emergence and 40 days sprayed as good, mu