本文主要介绍花卉营养缺乏的判断和防治,包括缺氮、缺磷、缺钾、缺钙、缺镁、缺硫、缺铁等的症状与防治方法。1缺氮。植株瘦弱,枝条细长发硬,叶小花小。叶色从老叶到新叶由浓绿而渐变淡,继而出现红紫色,直到萎黄脱落,严重时全株失去绿色。 This article mainly introduces the judgment and prevention and cure of flower nutrition deficiency, including the symptoms and control methods of nitrogen deficiency, phosphorus deficiency, potassium deficiency, calcium deficiency, magnesium deficiency, sulfur deficiency and iron deficiency. 1 nitrogen deficiency. Plant thin, stiff branches slender, small leaves flowers. Leaves from the old leaves to the new leaves by the dark green and gradually pale, and then reddish purple, until the chlorosis fall off, the whole plant loses its green color.