一般南方地区降雨量较多,并且土壤粘重、或水位较低或地势低洼容易造成果园排水不畅而积水,导致根系活力下降或死亡,出现树势较弱或死亡现象。起垄覆地布可起到防水和排水,以及保墒和防草作用,有利于根系土壤透气,毛细根增多。
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