A simple method for leaf and branch biomass estimation in Japanese cedar plantations
A simple method for leaf and branch biomass estimation in Japanese cedar plantations
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DOI：
10.1007/s00468-019-01920-8
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发表时间：
2019-10-26
影响因子：
2.3
通讯作者：
Tange, Takeshi
中科院分区：
文献类型：
--
作者：
Inagaki, Yoshiyuki;Nakanishi, Asami;Tange, Takeshi
关键信息中龄日本雪松人工林的叶和分支生物量可以准确地估计使用一个简单的方法基于管道模型理论。一个简单的方法来估计叶和分支生物量需要适当管理日本雪松，在日本的主要木材树种的森林。我们开发了一种简单的方法，基于管道模型理论，其中叶生物量估计树高，冠底高度，和树干面积在胸高。该方法的适用性进行了研究，在日本雪松人工林沿着地形梯度在五个地区。在4个地区的中龄林（< 60年生）中，树冠基部单位干面积的叶和分支生物量在不同地形位置的林分之间没有差异。相反，树冠基部单位茎面积的叶和分支生物量在四个区域之间存在差异。在千叶的老林（> 80年）中，树冠基部单位茎面积的叶生物量在6种森林之间存在差异，并且在特定森林中较大的树木中较低。我们的结论是，本文研究的方法是适用于中龄林，但它需要修改适用于老林。
Key message Leaf and branch biomass in middle-aged Japanese cedar plantations can be accurately estimated using a simple method based on the pipe model theory. A simple method for estimating leaf and branch biomass is needed to properly manage forests of Japanese cedar, a major timber species in Japan. We developed a simple method, based on the pipe model theory, in which leaf biomass was estimated from tree height, height at the crown base, and stem area at breast height. The applicability of the method was examined in Japanese cedar plantations along a topographic gradient in five areas. In middle-aged forests (< 60 years old) in four areas, the leaf and branch biomass per unit stem area at the crown base did not differ between forests of different topographic position within the area. In contrast, the leaf and branch biomass per unit stem area at the crown base differed between the four areas. In old forests (> 80 years) in Chiba, leaf biomass per unit stem area at the crown base differed between six forests and was lower in larger trees within a particular forest. We conclude that the method investigated herein is applicable to middle-aged forests, but it needs to be modified for application to old forests.