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本文报道一例罕见的晚霜对油松林的危害。调查表明油松初生嫩叶在活跃生长期如遇-2.7℃以下的低温,部分林木的初生嫩叶梢端即可受害;林木个体的耐寒力有很大差异。地形因子(主要是坡向、海拔)对成灾与否具有支配作用,它使受害林分在空间的分布里不连续格局。
This article reports a rare case of night cream on Pinus tabulaeformis forest hazards. The investigation showed that the young leaves of Pinus tabulaeformis could suffer when the young leaves of some trees fell to the low temperature below -2.7 ℃ during the active growth period. Topographical factors (mainly aspect and altitude) have the predominant effect on the occurrence of the disaster, which makes the damaged forests discontinuous in the spatial distribution.