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王博, 刘凯, 朱子政, 林勇, 王守强. 大渡河上游天然岷江柏木林生长分布研究[J]. 四川林业科技, 2018, 39(4): 106-111. DOI: 10.16779/j.cnki.1003-5508.2018.04.026
引用本文: 王博, 刘凯, 朱子政, 林勇, 王守强. 大渡河上游天然岷江柏木林生长分布研究[J]. 四川林业科技, 2018, 39(4): 106-111. DOI: 10.16779/j.cnki.1003-5508.2018.04.026
WANG Bo, LIU Kai, ZHU Zi-zheng, LIN Yong, WANG Shou-qiang. A Study of Natural Cupressus chengiana Forest Growth Distribution in the Upper Reaches of the Dadu River[J]. Journal of Sichuan Forestry Science and Technology, 2018, 39(4): 106-111. DOI: 10.16779/j.cnki.1003-5508.2018.04.026
Citation: WANG Bo, LIU Kai, ZHU Zi-zheng, LIN Yong, WANG Shou-qiang. A Study of Natural Cupressus chengiana Forest Growth Distribution in the Upper Reaches of the Dadu River[J]. Journal of Sichuan Forestry Science and Technology, 2018, 39(4): 106-111. DOI: 10.16779/j.cnki.1003-5508.2018.04.026

大渡河上游天然岷江柏木林生长分布研究

A Study of Natural Cupressus chengiana Forest Growth Distribution in the Upper Reaches of the Dadu River

  • 摘要: 为了解大渡河上游成片分布的天然起源岷江柏木生长分布情况,选择以马尔康市、金川县内典型分布区岷江柏木林为对象,以高清遥感影像为底图,采用现地调查和ARCGIS矢量化技术,调查了基质类型、坡度、坡向、海拔、可及度等生境因子及各因子上岷江柏木胸径、树高情况。结果发现:1)基质类型以裸岩和高石质砾石为主,两者面积达总面积的85.64%。小、中、大径组依次主要分布在高石质砾石、裸岩、土壤基质上。2)岷江柏木在不同坡向上均能生长,北、西北、西3个坡向面积占总面积68.04%,是岷江柏木的集中分布区,分布面积大、高度高,且以小径组为主。3)岷江柏木生长的坡度大多比较陡峭,36°坡度以上的面积占总面积的60.33%。不同径组、不同树高集中分布在陡坡、急坡、险坡上。4)岷江柏木集中生长在2 301 m~2 500 m的海拔范围内,分布面积占总面积81.01%。随着海拔升高,树木分布范围呈现出逐渐缩小的特点。5)受河流隔断、坡度陡峭等因素影响,天然岷江柏木林可及度较差,高达83.27%的面积为不可及。

     

    Abstract: In order to understand the growth and distribution of the natural Cupressus chengiana forest in the upper reaches of Dadu River,the cypress forest were chosen as the object in Maerkang and Jinchuan counties.Taking high definition remote sensing image as the bottom map,the ground survey and ARCGIS vectorization technology were used to investigate the habitat factors of agrotype,slope,slope direction,elevation accessibility and DBH,tree height in different habitats.The results showed that 1) 85.64% of the agrotype was bare rock and highly gravel stone.Small,medium and large diameter groups were mainly distributed on gravel stone,bare rock and soil.2) The trees could grow on different slopes,and the area of north,northwest and west occupied 68.04% of the total area.These three slope directions were the concentrated distribution areas of cypress,with large area,high height and small diameter tree species.3) The trees mostly grew on steep slopes,60.33% of which were above 36°.Different diameter groups and tree height were concentrated on steep slopes,and dangerous slopes.4) The trees mainly grew at the altitude of 2 301 m~2 500 m,and the distribution area accounted for 81.01% of the total area.Along with the growth of trees,the altitude distribution of cypress was decreasing.5) Due to the influence of river partition and steep slope,the accessibility of trees was pretty low,and 83.27% of the area was unreachable.

     

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