每生产100斤高粱籽粒需要氮2.6斤,五氧化二磷1.3斤,氧化钾3.0斤。如果这些营养元素供应不足,高粱就会出现缺素症状。缺氮:叶片呈淡黄色,植株细弱矮小,根少且细长瘦弱,籽实减 Each production of 100 kg of sorghum grain requires 2.6 kg of nitrogen, 1.3 kg of phosphorus pentoxide, 3.0 kg of potassium oxide. If these nutrients are not supplied enough, sorghum will show signs of deficiency. Nitrogen deficiency: leaves pale yellow, plant thin and short, thin and slender thin, seed reduction