小兴安岭白桦种群径级结构与生命表分析.PDF

1m回回事哥 小兴安岭白桦种群径级结构与生命表分析 殷东生，张海峰，王福德，温爱亭，兰士泼 (黑龙江省林业科学研究所，哈尔滨 150081) 摘 要:根据 12 块总面积为 6 000 m2 样地的实地调查资料，分析了白桦种群的径级结构，编制了该种群的特定时 4 间生命表，绘制了存活曲线、死亡率曲线和损失度曲线，并用 个生存函数进行种群的生存分析。结果表明:白桦 龄级出现死亡高峰，种群存活曲线属于 Deevey - II 型，白桦种 种群幼年个体丰富，中老年个体相对较少，种群在第 V 群目前表现为增长型种群。在自然条件下，当白桦胸径达到 15 cm 左右时，应对其进行抚育管理以提高木材利用率。 关键词:小兴安岭;白桦;径级结构;生命表 The Size Structure and Life Table Analysis of Betula platyphylla Population in Xiaoxing anling II YIN Dong-sheng , ZHANG Hai-feng , WANG Fu-de , WEM Ai-ting , LAN Shi-bo Abstract: Based on the investigation of 12 plots Betula platyphylla population with an area of 6 000 m2 , the size structure and the life table of the population were established and the survivor由ip of B. pIαtyphylla population was analyzed by the curves of survivorship , mortality rate , hazard in this paper. The results showed that the number of young individuals was larger than that of middle aged and old individuals in the B. pIαtyphyllαpopulation. The population had one peak of mortality in size class V. The survival curve of the population appeared to be the Deevey - II type. The population was a rise type at present. The tending management should be actualized to increase the timber utilization quotiety when DBH of B.plαtyphylla individual reached to 15 cm in natural conditions. Key words: Xiaoxing anling; Betula platyphylla; Size structure; Life table Author s address: Forestry Research Institute of Heilongjiang Province , 150081 Harbin , China 白桦为我国东北地区典型的先锋树种，在阔叶红 从而体现种群动态及其群落的演替趋势，对阐明生态 松林经皆伐、火烧或撂荒后天然更新的次生林，是阔 系统的发展、群落结构的特征和发展趋势有重要的研 叶红松林次生演替系列中