论文部分内容阅读
天山云杉(Picea schrenkiana var.tianschanica)是新疆天山山地森林的优势树种,是亚洲中部山地的特有种,在我国仅见于新疆。天山云杉林在新疆水源涵养、水土保持、气候调节等方面都起着至关重要的作用。研究天山云杉在天山东部、中部以及西部不同地域林分结构变化规律,对科学合理经营天山云杉林具有重要的指导意义。本文于2011年7月对天山东部的木垒林场、天山中部的新疆农业大学实习林场、天山西部的西天山国家级自然保护区3个不同地域上的天山云杉林分结构进行了调查,样地面积均为1hm2(100m×100m),应用负指数分布函数分别模拟天山云杉林直径分布结构并进行q检验,模拟结果为天山东部N=188.973 9e-0.0705D,q=1.33;天山中部N=63.952 5e-0.0300D,q=1.13;天山西部N=15.993 7e-0.0182D,q=1.08。研究结果表明天山东部小树密度较高,天山西部大树密度较高,依据q值法则和天山云杉树高结构和年龄结构特征分析,对生长在天山东部、中部、西部不同经度的天山云杉林应采用不同的森林经营措施,以便持续最大地实现天山云杉林森林多功能之目标。
Picea schrenkiana var. Tianschanica is a dominant species in the Tianshan mountainous forest in Xinjiang, endemic to central Asia and only found in Xinjiang in China. Tianshan spruce forest in Xinjiang water conservation, soil and water conservation, climate regulation and so plays a vital role. Studying the variation of stand structure of Tianshan spruce in the eastern, central and western regions of Tianshan Mountains is of great guiding significance to the scientific and rational management of the Tianshan spruce forest. In July 2011, we investigated the structure of Tianshan spruce on three different geographical areas, Mulei Forest Farm in the east of Tianshan, internation forestry farm of Xinjiang Agricultural University in the middle of Tianshan Mountain, and West Tianshan National Nature Reserve in western Tianshan. The area of sample plots were all 1hm2 (100m × 100m). The negative exponential distribution function was used to simulate the diameter distribution of spruce forest in Tianshan Mountain, and the q-test was conducted. The simulation results were N = 188.973 9e-0.0705D, q = 1.33 Middle N = 63.952 5e-0.0300D, q = 1.13; western Tianshan N = 15.993 7e-0.0182D, q = 1.08. The results show that the density of the small trees in the eastern Tianshan Mountains is relatively high, and the density of the large trees in the western Tianshan Mountains is high. According to the q value rule and the height structure and age structure of the spruce trees in Tianshan Mountains, Tianshan spruce forest should adopt different forest management measures, in order to continue to achieve the maximum Tianshan spruce forest multi-purpose goal.