CROWN DEVELOPMENT IN CONIFER STANDS IN SCOTLAND AS INFLUENCED BY INITIAL SPACING AND SUBSEQUENT THINNING TREATMENT
CROWN DEVELOPMENT IN CONIFER STANDS IN SCOTLAND AS INFLUENCED BY INITIAL SPACING AND SUBSEQUENT THINNING TREATMENT
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DOI：
10.1093/forestry/39.1.40
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发表时间：
1966-01-01
期刊：
影响因子：
2.8
通讯作者：
KRAMER, H
中科院分区：
文献类型：
--
作者：
KRAMER, H
本文研究了影响挪威云杉（Picea abies）、锡特卡云杉（P.sitchensis）和道格拉斯冷杉（Pseudotsuga taxifolia）树冠生长的不同因素，并按树高、间伐程度和质量等级，给出了这三个树种的树冠生长曲线。揭示了不同间伐程度对平均木和全林分树冠表面积（和树冠体积）的影响，以及蓄积生长量与树冠表面积（和蓄积）的关系。不同的林冠类的林分总增量的贡献进行了评估。最后，这些研究结果可能有细化技术的相关性被认为是。
This paper deals with the different influences affecting the development of the crown per cent. in Norway spruce (Picea abies), Sitka spruce (P. sitchensis), and Douglas fir (Pseudotsuga taxifolia) stands and gives for these three species development curves of crown per cent. according to top height, thinning grade, and quality class. It shows the effect of different thinning grades on the crown surface (and crown volume) of the mean tree and the whole stand, together with the relationship between volume increment and crown surface (and volume). The contribution of the different canopy classes to the total increment of the stand is assessed. Finally the relevance which these findings might have on thinning techniques is considered.