一、冬小麦苗期缺乏营养元素症状 1.小麦缺氮的主要症状:叶黄绿、尖端变黄,分蘖少,茎细弱发红。 2.小麦缺磷的主要症状:叶深绿,叶尖端黄枯,新叶蓝绿,尖紫红色,穗小。 3.小麦缺钾的主要症状:叶蓝绿,老叶初黄渐变棕色,叶尖边枯死,全叶也随之枯死,显烧焦状。茎短而弱,籽粒不充实,分蘖不规则,成穗少。 二、冬小麦苗期缺乏营养元素补充措施 First, the winter wheat seedling symptoms of nutrient deficiency 1. Wheat nitrogen deficiency of the main symptoms: yellow-green leaves, the tip of the yellow, less tillers, stems weak redness. 2. The main symptoms of phosphorus deficiency in wheat: dark green leaves, leaf tip yellowish yellow, greenish blue, spirea, spikelets. 3. The main symptoms of wheat potassium deficiency: blue-green leaves, the early yellow gradient brown, leaf edge dead, the whole leaf also withered, was burned. Stems short and weak, grain is not full, tiller irregular, less spike. Second, the lack of winter wheat seedling nutrient supplement