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省宁东林业局平和梁华北落叶松和华山松人工林,1985年10月16日至19日因受雨淞和降雪危害,林木发生断梢、断干、倒伏,损失严重,总面积达2579.35亩,直接经济损失约达105624.38元。1985年12月18日对其受害情况进行了调查,现将调查情况汇总如下。一、调查方法采用10×10米的样方进行调查。每个样方要求有充分的代表性,调查时分正常、断梢(近两年生梢以上折断者)、断干(近两年生梢以下折断者)和倒伏四种情况进行每木检尺登记;并在每个样方内或样方附近的林分中测定未受害的生长正常林木的树高,每个径阶测3～5株,以求其林分平均高。二、调查结果经调查,在平和梁北坡海拔1970米以上南坡海拔2030米以上的林木,除云、冷杉外均
Province Ning Dong Forestry Bureau Pinghe Liang Larix principis-rupprechtii and Pinus armandi plantation, from October 16 to 19, 1985 due to the impact of rain and snowfall, forest trees were broken, broken, lodging, the loss of a total area of 2579.35 Mu, direct economic loss of about 105,624.38 yuan. December 18, 1985 investigated the victimization, the investigation is summarized below. First, the survey method using 10 × 10 m square to investigate. Each quadrat requires ample representation, with normal hours of investigation, broken tips (broken above shoots in the past two years), broken logs (broken in the past two years with shoots below) and lodging. The tree height of uninvolved normal growth trees was determined in the forest of each quadrat or in the vicinity of the quadrats. The average height of the stands was 3 ~ 5 for each diameter. Second, the survey results surveyed, in the north of Pingliang elevation of more than 1970 meters above the southern slope of 2030 meters above the forest, in addition to clouds, fir outside