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首页> 外文期刊>Annals of Forest Science >Generalized biomass equations for the main aboveground biomass components of maritime pine across contrasting environments
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Generalized biomass equations for the main aboveground biomass components of maritime pine across contrasting environments

机译：对比环境中海松主要地上生物量组成的广义生物量方程

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摘要

In order to predict the biomass of aerial components of maritime pine stands (Pinus pinaster Ait.), generalized allometric equations were developed using data collected from the southern and northern margins of its geographical area.The data comprised biomass values divided into foliage, branch, stem and minor components collected from 26 trees in Tunisia and 152 trees in France. Some trees were taken from plots receiving fertilisation and irrigation. The equation W = aD (b) , where W is the biomass, D the stem diameter and a and b are fitted parameters, explained 98% of the variations in the total aerial biomass. The addition of tree age reduced significantly the residual sum of squares for the foliage component. This model explains 79% of the variations in foliage biomass observed.To a lesser extent, the age variable also improved the stem and branch models that explain 98% and 71% of the observed sum of squares, respectively. Site variables such as the stocking density, stand basal area, fertilisation or annual precipitation did not reduce the residual sum of squares, suggesting that their putative effects are conveyed through tree growth rate.
机译：为了预测海生松林（Pinus pinaster Ait。）空中成分的生物量，利用从其地理区域的南部和北部边缘收集的数据建立了通用的等速方程，该数据包括分为叶，枝，茎和次要成分来自突尼斯的26棵树和法国的152棵树。一些树木取自接受施肥和灌溉的地块。方程W = aD（b），其中W是生物量，D是茎直径，a和b是拟合参数，解释了总的航空生物量中98％的变化。树木年龄的增加显着减少了叶子成分的平方余数。该模型解释了观察到的79％的树叶生物量变化。年龄变量还改善了茎和分支模型，分别解释了所观察到的平方和的98％和71％。场地变量，例如种群密度，林分基础面积，施肥或年降水量，并未减少残差平方和，表明它们的推定效应是通过树木的生长速度传达的。

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