@article{aees2018642,
author={{Chen, Dongsheng and Sun, Xiaomei and Zhang, Shougong},
title={Evaluating the Crown Character and Biomass Distribution of <i>Larix olgens</i><i>is</i> in Northeastern China},
journal={Applied Ecology and Environmental Sciences},
volume={6},
number={4},
pages={109--117},
year={2018},
url={http://pubs.sciepub.com/aees/6/4/2},
issn={2328-3920},
abstract={This study was performed in 22 unthinned <i>Larix olgens</i><i>is</i> plantations in northeast . Data were collected on 95 sample trees of different canopy positions and the diameter at breast height (d<SUB>1.3</SUB>) ranged from  to . The individual tree models for the prediction of vertical distribution of live crown, branch and needle biomass were built. Our study showed that the crown, branch and needle biomass distributions were most in the location of 60% crown length. These results were also parallel to previous crown studies. The cumulative relative biomass of live crown, branch and needle were fitted by the sigmoid shape curve and the fitting results were quite well. Meanwhile, we developed the crown ratio and width models. Tree height was the most important predictor for crown ratio model. A negative competition factor, <i>ccf </i>and <i>bas</i> which reflected the effect of suppression on a tree, reduced the crown ratio estimates. The height¨Cdiameter ratio was a significant predictor. The higher the height-diameter ratio, the higher crown ratio is. Diameter at breast height is the strongest predictor in crown width model. The models can be used for the planning of harvesting operations, for the selection of feasible harvesting methods, and for the estimation of nutrient removals of different harvesting practices.},
doi={10.12691/aees-6-4-2}
publisher={Science and Education Publishing}
}