权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Structure and function of ever green broad-leaved environmental protection forests created in industrial area

工业区常绿阔叶环保林的结构与功能

基本信息

批准号：
13680639
负责人：
HARADA Hiroshi
金额：
$ 2.56万
依托单位：
Yokohama National University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13680639/
关键词：
environmental protection forest structure and function index of naturalness litterfall decomposition of fallen leaves stem flow soot and dust soil animal 環境保全機能林内雨

项目摘要

1.The annual total litterfall averaged at 7.6ton/ha (5.7-8.5ton/ha). Fallen leaves formed the greatest portion of the litterfall ; 63-86% at pot A, and 73-86% at plot B.Seasonal changes in litterfall displayed the same characteristics as a natural evergreen broad-leaved forest ; showing a drastic increase in May, with high litterfall continuing through late Summer until September.2.Litter accumulation mass and litterfall mass was measured at Higashi-Ohgishima and Atami to derive average annual decomposition rates, which were 64% and 84%, respectively. The reasons for faster decomposition at Atami are assumed to be that soil animals were rich and that litter consisted mainly of fast-decomposing Castanopsis cuspidate var. sieboldii, among other things.3.The amount of soot and dust contained in canopy throughfall was 1.2-2.7 times the amount in rainwater. The amount of soot and dust falling to the floor of the environmental protection forest was greater in the summer and less in the winter, corresponding to differences in the amount of rainfall.4.The sequestered amount of carbon dioxide per 100 m^2 has been increasing since 1995. The amount was greatest in the plot that had never been thinned since 2004 at 1652 kg-CO2.5.The present of supply sources of soil animals in vicinity is considered to have contributed to these hig index values. The index of naturalness was higher at the bottom of the mound, where more litter accumulation exists, compared to the upper portion even in the same environmental protection forest.

1.年凋落物总量平均为7.6吨/公顷（5.7- 8.5吨/公顷）。凋落物以落叶为主，在A、B样地分别占63-86%和73-86%，其季节变化与天然万年青阔叶林相似;在五月份急剧上升，2.在东-Ohgishima和热海得出的平均年分解率，分别为64%和84%。热海凋落物分解速度快的原因可能是土壤动物丰富，凋落物主要由快速分解的东北锥组成。林冠穿透雨中的烟尘含量是雨水的1.2-2.7倍。1995年以来，每100 m^2大气固碳量呈上升趋势。2004年以来从未间伐的样地土壤动物的数量最大，为1652 kg-CO2.5。同一防护林中，枯落物堆积较多的丘底自然度指数也高于丘上部。