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Zhejiang Northwest conifer forest structure characteristics of

Author: LiDong
Tutor: WeiXinLiang
School: Zhejiang Forestry University
Course: Forest Management
Keywords: Diameter Structure Size than the number of Mingling Spatial structure Stand structure
CLC: S718.5
Type: Master's thesis
Year: 2010
Downloads: 84
Quote: 0
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Abstract


Zhejiang Northwest conifer complex, versatile, is an important ecological forest types in the regional nature conservation and environment plays an important role in how to better protect and operating Zhejiang Northwest conifer has become an important research topic. In this study, research Zhejiang Northwest conifer forest in northwestern Zhejiang structural features to guide the construction of conifer, emphatically analyzed Zhejiang structure Northwest conifer species, diameter distribution and spatial structure, and in particular the use of crown increase size than on spatial analysis of the structure, there are certain ideas. For Zhejiang Northwest conifer forest structure in the main problems is proposed to further improve the ways and means of stand structure, in order to carry out scientific and rational northwestern Zhejiang conifer resource protection, development and management to provide technical Support. In this paper, Lake Scenic Area, Castle Lake National Forest Park conifer for the study, from the two major aspects of the Zhejiang Northwest conifer forest structure characteristics: ① to the diameter distribution of forest attributes represented statistical characteristics; ② forest spatial structure - with mixed degrees, and the angular size than the number of indicators to measure spatial structure as described in the spatial relationships between individual trees, reached the following conclusions: (a) forest areas Forest Types diameter distribution of natural uneven-aged forest stands in line diameter structure of the basic features. In contrast, the negative exponential distribution is more suitable for these 12 plots stand diameter structure fit. (2) In general, the plots of the mingling mean are above 0.7, the average mingling each species is relatively high, the strength or extreme intensity mixed mixed in frequency of occurrence of each species is high, indicating that single species of each species is relatively small congregation, mostly as scattered state. (3) The average angular scale analysis showed that, in addition to individual plots average angle index value is less than 0.517, the other plots were greater than the average value of 0.517 angular scales. And every little difference to the average angular scale, we can see that the distribution of forest overall distribution pattern was gathered. (4) species differentiation DBH and tree height differences are significant, pine tree height and diameter in size than occupy a certain advantage, DBH and tree height than the size distribution of the number of species in the reaction of each of the reference tree and the adjacent wood In terms between growth advantage, with a strong consistency, and tree height and diameter size than the size of the distribution than the trend is very close, but the crown size than the number of the deviation from the first two laws.

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CLC: > Agricultural Sciences > Forestry > Forestry basic science > Forest Biology > Forest Ecology
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