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一、肥料和农药过量引起的:不适当的或过量的施用肥料和农药,常能引起对玉米的伤害。1、肥料烧害这是很常见的,可溶性肥料过多地接触种籽可阻止萌芽,较多的是玉米幼苗出土后死亡;有些苗株虽能存活,但严重的矮化,叶子变黄逐渐枯死。如在湿土上播种,其后有一段干旱期使水分蒸发,以致肥料中盐溶液浓缩造成危害,特别是在砂土和施用高盐分指数的肥料为甚。2、液体氨伤害液体氨伤害能使玉米的根系变成破碎、短损和干缩,植株的第一叶矮缩、带黄斑不能全展开。除非用量过多,一般由于种植前施用氨肥而受害的并不
First, caused by excessive fertilizers and pesticides: Inappropriate or excessive application of fertilizers and pesticides, can often cause damage to corn. 1, fertilizer burn It is very common, soluble fertilizer too much contact with seeds can prevent germination, more is the death of corn seedlings after emergence; although some seedlings survive, but serious dwarf, the leaves turn yellow gradually Death. Sowing on wet soil, followed by a period of drought that evaporates water, compromises the concentration of salt solution in fertilizers, particularly on sand and fertilizers with high salinity indices. 2, liquid ammonia damage liquid ammonia damage to the roots of corn can become broken, short-term loss and shrinkage, the first leaf dwarf plants, with macular can not be fully expanded. Unless used in excessive amounts, it is not usually harmed by the application of ammonia fertilizer before planting