小麦坐篼属于营养型的生理性障碍病害,主要发生在土壤偏酸、微量元素缺乏的黄壤和沙土里。尤其是沙溪庙组发育的酸性土壤(pH值为5.3—5.8),钼的有效性降低,小麦体内硝态氮不能顺利转化成铵态氮,造成小麦坐篼死苗。小麦 Sitta decumbens are nutrient-based physiological disorders that occur mainly in yellow soil and sandy soil where soil is slightly acidic and trace elements are scarce. In particular, the acid soil (pH value 5.3-5.8) developed in Shaximiao Formation reduced the availability of molybdenum, and nitrate nitrogen in wheat could not be successfully transformed into ammonium nitrogen, resulting in the formation of dead wheat seedlings. wheat