冬春季节须防果树日灼

• 作 者: 闫瑞凤 王继瑶
• 机 构: 河南省许昌林科所,河南省许昌林科所
• 出 处: 农家参谋
• 发表日期: 1996年11期
• 关键词: 日灼 涂白剂 融冻 木质部分 皮层细胞 合理追肥 辅养枝 冬水 成年树 水分蒸腾

果树冬春日灼是由于冬春季夜间气温急剧下降,枝干组织结冰,白天经阳光直射,枝干西南面的温度明显升高而融冻,融冻的交替使皮层细胞瓦解死亡。受害轻时,树皮出现块斑状变褐局部干枯;受害重时,树皮发生龟裂,韧皮部与木质部分离,造成死干、死枝。可采取如下措施预防。

Fruit trees winter and spring sunburn is due to the sharp temperature drop in winter and spring night, branch tissue icing, direct sunlight during the day, the southwestern branches of the temperature was significantly increased and frozen, thawed alternately cortical cells collapse death. When the victim is light, the bark appears patchy brown spots local dry; when the victim is heavy, the bark cracks, phloem and xylem separated, resulting in dead dry, dead branches. The following measures can be taken to prevent.