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以九连山国家级自然保护区典型常绿阔叶林为对象,研究树木属性、地形因子与冰雪灾害受损程度的关系.结果表明:九连山常绿阔叶林(DBH≥10 cm)以栲属物种占据主要优势.断梢率、腰折率、翻蔸率和平均受损指数(MDI)最高的树种分别为马尾松、米槠、丝栗栲和米槠,最低的树种分别为红楠、丝栗栲、枫香和罗浮柿.断梢率与胸径(DBH)、树高(H)显著正相关(P<0.01),与H/DBH显著负相关(P<0.01);腰折率与DBH显著负相关(P<0.01);翻蔸率与DBH显著负相关(P<0.01).林分受损程度分析显示,在22≤DBH<24 cm、15≤H<17 m或100≤H/DBH<110时,MDI值最高,在40≤DBH<42 cm、5≤H<7 m或H/DBH≥120时,MDI值最低.坡向对腰折率和MDI值影响显著(P<0.01),N-NE生境中MDI值最高;坡度对树木不同受损指标影响不显著(P>0.05),坡度30°～40°生境中MDI值最高.
Taking the typical evergreen broad - leaved forest in Jiulianshan National Nature Reserve as an example, the relationship between the attributes of trees and the damage degree of the snow disaster was studied. The results showed that the evergreen broad - leaved forest (DBH≥10 cm) The dominant species of the genus Rubra were Pinus massoniana, Miriam, Castanopsis fargesii and Miriam.The highest tree species with the highest rate of breakage, waist rate, turnover rate and average MDI were (P <0.01), but negative correlation with H / DBH (P <0.01); lumbar intervertebral discolouration was significantly correlated with DBH and H (P <0.01) (P <0.01). There was a significant negative correlation between turnover rate and DBH (P <0.01). Analysis of the damage degree of stands showed that in the condition of 22≤DBH <24 cm, 15≤H <17 m or MDI value was the highest when 100≤H / DBH <110 and lowest when 40≤DBH <42 cm, 5≤H <7 m or H / DBH≥ 120. The slope had a significant effect on waist rate and MDI (P <0.01). The value of MDI in N-NE habitat was the highest. The effect of slope on the different damage indexes of trees was insignificant (P> 0.05), and the value of MDI was the highest in 30 ° -40 ° habitat.