施肥量过大或过于集中,常使树体某些部位发生的灼伤或者伤害,造成肥害。 1 有机肥肥害:有机肥未腐熟施用或者施入比较集中,未与土掺匀,易发生肥害。有人在葡萄定植沟内施入未充分腐熟圈粪约25kg,且肥料成团成块,结果出现肥害症状,葡萄幼苗一开始长得很好,但当苗高20cm左右时,除蔓尖上的几个嫩叶外,其余叶片均出现焦边现象,受害严重的树,叶片脱落,扒开土层后发现肥块周围大部分须根死亡。 2 含氯肥料危害果树:果树中的桃、樱桃、李、苹果、柿等树种对氯离子敏感。氯化铵、氯化钾以及以它们为基础配成的 Fertilization is too large or too concentrated, often causing some areas of the tree burns or injuries, resulting in fertilizer damage. 1 Organic Fertilizer Fertilizer: organic fertilizer is not decomposed or applied into a more concentrated, not with the soil, easy to fatal. Some grapes into the grapes in the grapes infuse less than fully encircled enclave about 25kg, and the fertilizer into a group into blocks, resulting in fat symptoms, grape seedlings grow well at the beginning, but when the seedling height of about 20cm, Of the leaves, the rest of the leaves are the phenomenon of coke, severe damage to the tree, the leaves fall off, after digging the soil found most fat around the fibrous roots died. 2 Chlorine fertilizer hazards fruit trees: fruit trees in the peach, cherry, plum, apple, persimmon and other tree species sensitive to chloride. Ammonium chloride, potassium chloride, as well as based on them