小陇山锐齿栎天然林空间结构特征

doi:10.11707/j.1001-7488.20090301

林业科学 ›› 2009, Vol. 12 ›› Issue (3): 1-6.doi: 10.11707/j.1001-7488.20090301

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小陇山锐齿栎天然林空间结构特征

赵中华¹ 惠刚盈¹ 袁士云² 刘文桢²王润喜²

( 1. 中国林业科学研究院林业研究所国家林业局林木培育重点实验室北京100091；2 .甘肃省小陇山林业实验局天水741020 ）

收稿日期:2008-01-16 修回日期:1900-01-01 出版日期:2009-03-25 发布日期:2009-03-25

Spatial Structure Characteristic of Quercus aliena var. acuteserrata Natural Forest in Xiaolongshan

Zhao Zhonghua¹,Hui Gangying¹,Yuan Shiyun²,Liu Wenzhen²,Wang Runxi ²

( 1. Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration Research Institute of Forestry, CAF Beijing10009 2 .Xiaolongshan Forest Experiment Bureau of Gansu ProvinceTianshui741020 ）

Received:2008-01-16 Revised:1900-01-01 Online:2009-03-25 Published:2009-03-25

摘要/Abstract

摘要：

摘要：研究小陇山3个类型锐齿栎天然林的直径分布和空间结构参数（混交度、角尺度和大小比数），分析其空间结构特征。结果表明:王安沟100多年未经人为干扰的锐齿栎天然林和响潭沟皆伐迹地上经近40年封山后自然恢复的次生林均表现为异龄林的直径分布特征，但从q 值来看，王安沟锐齿栎天然林直径分布较响潭沟次生林更加合理，白营西沟择伐林的直径分布虽然表现为小径木占的比重比较大，但各径阶间的变幅平缓，有明显人为干扰的痕迹；王安沟锐齿栎天然林和白营西沟次生林林木个体分布角尺度均值分别为0.489和 0.487，林分内林木整体分布格局属随机分布，响潭沟次生林林分角尺度均值为0.520，其林木水平分布格局表现出轻微的团状分布，群落还处于演替的早期阶段；3个林分中王安沟锐齿栎天然林的树种隔离程度最高，响潭沟次之，白营西沟最低，混交度分别为0.598，0.542和0.451；白桦、华山松在不同的林分中所处的地位不同，从王安沟锐齿栎天然林、响潭沟次生林到白营西沟择伐林表现出大小比数依次降低的趋势，而锐齿栎、漆树等树种则在3个林分中所处的地位一致；人为干扰对白营西沟次生林的结构特征有明显的影响。

关键词: 关键词：锐齿栎, 天然林, 直径分布, 角尺度, 混交度, 大小比数, 小陇山

Abstract:

Abstract: This paper used diameter distribution and spatial parameter （uniform angle index, mingling and neighborhood comparison） to study the spatial structure characteristics of three stands of Quercus aliena var. acuteserrata natural forest in Xiaolongshan. The result showed that the structure of the three stands was obviously different: the diameter distribution in the natural forest in Wang'angou which absented disturbance for 100 years, andin the secondary forest originated from a clear\|cutting site in Xiangtangou in 1969 were of the typical uneven\|aged forest, and their tree number proportion of small and middle diameter class were large in stands and the proportion was decreased with the diameterclass increased. In comprison, the Wang'angou diameter distribution was more uniform than Xiangtangou. The small stem proportion was larger in Bayingxigou but it decreased more gently with the diameter increase, which suggested there was an obviously disturbance trace. The uniform angle index value of Wang'angou and Baiyingxigouwas 0.489 and 0.487 respectively, and the pattern of horizontal distribution was random. The uniform angle index value of Xiangtangou was 0.520, and its distribution was of slight cluster, which exhitited the the community was stillat early stage of succession. The tree species segregation of Wang'angou was maximum, followed by Xiang tangou and then Baiyingxigou. Their mean value of mingling was 0.598, 0.542 and0.451 respectively. Neighborhood comparison showed that Betula platyphylla and Pinus armandi were in different status in three different stands, and their status were decreased in order from Wang'angou, Xiang tangou to Baiyingxigou. However, Quercus aliena var. acuteserrata and Toxicodendron verniciflum had the same status in stands. Artificial disturbance had obviously effect on the forest structure in Baiyingxigou.

Key words: Key words: Quercus aliena var. acuteserrata, natural forest, diameter distribution, uniform angle index, mingling, neighborhood comparison, Xiaolongshan

赵中华惠刚盈袁士云刘文桢王润喜. 小陇山锐齿栎天然林空间结构特征[J]. 林业科学, 2009, 12(3): 1-6.

Zhao Zhonghua;Hui Gangying;Yuan Shiyun;Liu Wenzhen;Wang Runxi . Spatial Structure Characteristic of Quercus aliena var. acuteserrata Natural Forest in Xiaolongshan[J]. Scientia Silvae Sinicae, 2009, 12(3): 1-6.

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小陇山锐齿栎天然林空间结构特征

Spatial Structure Characteristic of Quercus aliena var. acuteserrata Natural Forest in Xiaolongshan

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