林业科学 ›› 1998, Vol. 34 ›› Issue (4): 116-122.
• 研究简报 • 上一篇 下一篇
熊奎山
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Kuishan Xiong
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关键词: 人工同龄纯林, 树冠面积比例系数, 林分标准密度确定
Abstract:
The crown area proportional coefficient of pure artificial even-aged stand means the ratio of the area of the stand to its crown. Standard density refers to the theoretical density of the pure artificial even-aged stand area when its crown density is 1.0. According to the method of studing the forest site classification and evoluation in Nanling mountainous region, when the arrangements of forest tree in a stand are the rectangle and isosceles triangle, the crown area proportional coefficient and range of its variation have been concluded in this paper, if canopy density is 1.0. And we calculate stand standard density (stem number) of two kinds of arrangements, which provides the scientific bases for precisely determing the standard density and quantitative intermediate cutting of a pure artificial even-aged stand.
Key words: Pure artificial even-aged stand, Proportional coefficient of crown area, Determination of standard stand density
熊奎山. 人工同龄纯林树冠面积比例系数计算及林分标准密度(立木株数)确定的研究[J]. 林业科学, 1998, 34(4): 116-122.
Kuishan Xiong. A STUDY ON CALCULATING PROPORTIONAL COEFFICIENT OF CROWN AREA AND DETERMINING STANDARD DENSITY (STEM-NUMBER) OF PURE ARTIFICIAL EVEN-AGED STAND[J]. Scientia Silvae Sinicae, 1998, 34(4): 116-122.
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图1
等腰三角形垂直平行线示意图"
图2
品字形(等腰三角形)排列郁闭度刚达1.0时示意图"
图3
矩形示意图"
图4
矩形排列郁闭度刚达1.0时示意图"
图5
行株距比0.58时林木矩形排列"
图6
林木品字形排列郁闭度刚达1.0行株距比为1.73时示意图"
图7
行株距比为0.5时林木品字形排列"
表1
常用林木品字形(等腰三角形)排列,郁闭度刚达1.0时树冠面积比例系数及标准密度(立木株数)"
表2
常用林木矩形排列、郁闭度刚达1.0时树冠面积比例系数及标准密度(立木株数)"