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在高山地区,冰雪折压林木是一种常见的自然灾害。轻者,使少量林木折断、压倒和翻蔸。重者,使成片森林毁于一旦。我县每年毁于冰雪灾害的林木近一万m~3左右。仅1986年3月16日,我县杨林区发生了一起少见的冰雪灾害,毁坏成片森林895亩,损坏胸径10cm以上林木22.4万株,材积1.12万m~3。损坏胸径10cm以下的幼树15.8万株。相当于该区年采伐限额1000m~3的11年采伐量。为了控制或减轻灾害,保护森林,提出相应的防止措施,笔者对这次灾害进行了调查,
In the high mountains, snow and snow foliage is a common natural disaster. Light, so that a small amount of trees broken, overwhelmed and turned 蔸. In severe cases, a piece of forest destroyed. My county is destroyed by ice and snow disaster every year, nearly 10,000 m ~ 3 trees. Only March 16, 1986, my county Yanglin District, a rare snow disaster, destroyed 895 acres into pieces of forest, damaged forest diameter above 10cm 224,000 strains, volume 11200 m ~ 3. Damaged 158,000 young trees below 10cm in diameter. Equivalent to the area annual cutting quota of 1000m ~ 3 11-year cutting volume. In order to control or mitigate the disaster, protect the forest and put forward the corresponding prevention measures, the author conducted a survey on this disaster,