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基于小兴安岭丰林国家级自然保护区阔叶红松林30 hm2监测样地,利用叶面积指数(LAI)与胸高断面积间的经验模型计算样地内主要树种及所有树种的总LAI,研究海拔、坡度、坡向和曲率4种地形因子对LAI分布的影响,以及对LAI分布的综合作用.结果表明:4种地形因子对红松、冷杉、紫椴、裂叶榆和五角槭5种主要树种LAI的分布均存在显著影响,而坡向对枫桦LAI的分布存在显著影响;4种地形因子对所有树种总LAI的分布具有显著影响.将样地划分为山脊、阳坡、山谷阳面、阴坡和山谷阴面5种生境类型.生境类型对所有树种总LAI的分布存在显著影响,其中山脊LAI显著高于其他生境类型,均值为8.85;阳坡的LAI次之,均值为7.62;山谷阳面和阴坡的LAI不存在显著差异;而山谷阴面的LAI最小,均值为4.42.
Based on the 30 hm2 monitoring plots of the broad-leaved Korean pine forest in Fenglin National Nature Reserve in Xiaoxing’an Mountains, the total LAI of main species and all tree species in the plots was calculated using empirical models of leaf area index (LAI) and inter-thoracic area. , Slope direction and curvature on LAI distribution and LAI distribution were analyzed.The results showed that LAI of four main tree species, Pinus koraiensis, Fir, Tilia amurensis, , While the slope direction had a significant effect on the distribution of LAI of Betula platyphylla.The four kinds of topographic factors had a significant effect on the distribution of total LAI of all tree species.The plots were divided into ridges, sunny slopes, valleys, shady slopes And the types of habitats in the negative of the valley.The habitat types had a significant effect on the distribution of total LAI of all species, and the LAI of the ridge was significantly higher than that of other habitat types, with an average of 8.85, followed by the LAI of the sunny slope with an average of 7.62, There is no significant difference in slope LAI; while the valley LAI minimum, with a mean of 4.42.