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冰写低温较重的年份,常给柑桔带来不同程度的冻害,必须做好灾后桔树的护理工作,以减轻危害,恢复树势。 1.轻微受冻,发生卷叶,黄叶、生长衰弱的,可立即用0.5％尿素进行根外追肥2次～3次,早春解冻后,提早施足春肥,以恢复树势。 2.根据“小伤摘叶、中伤剪枝、大伤锯干”的原则,合理处理树冠。(1)摘叶。对枝梢完好,但叶片受冻枯焦,未发生离层,而挂在枝上不落的,由于它还继续消耗水分,扩大受冻部分,应尽早摘去,防止枝梢枯死。(2)剪枝。对枝梢受冻者,宜在萌芽抽梢后再行修剪。因此时修剪能辨认冻死部分,确定修剪位置,且气温增高,有
Ice cold years write heavy, often to the citrus bring varying degrees of frost damage, orange trees must be done after the disaster care work to reduce the harm and restore the tree. 1. Slightly cold, the occurrence of curly leaves, yellow leaves, weak growth, can be used immediately 0.5% urea top-dressing 2 to 3 times, early spring thawed, early enough to apply spring fertilizer to restore the tree vigor. 2. According to “small injury pick the leaves, slander pruning, big wound sawing” principle, reasonable treatment crown. (1) pick leaves. On the shoots intact, but the leaves were frozen and coke, did not happen from the layer, and hanging on the branches do not fall, because it also continues to consume water, expand the frozen part, should be removed as soon as possible to prevent shoots dead. (2) pruning. On the shoots by the cold, should be sprouting in the shoot after pruning. So when the trim can identify frozen parts, to determine the location of pruning, and the temperature increased, there