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The Long Term Monitorring on Tree Phenology and Acid Deposits

树木物候和酸沉积的长期监测

基本信息

批准号：
05506001
负责人：
FUJIWARA Koichiro
金额：
$ 44.42万
依托单位：
Yamagata University (1995)Hokkaido University (1993-1994)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (A)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1995
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05506001/
关键词：
Acid Rain Tree Phenology Stemflow Forest Soil Forest Environment Long Term Monitorring University Forests ブナ

项目摘要

To evaluate the environmental deline in forests a long term monitorring project was made by he Japanese Conference of University Forests in 1992.1. The tree phenology of main native spcies were investigated at one hundred stands in unversity forests. To evaluate the babitat factors of the stands, follwing trees included for investigation.a. Japanese beech (Fagus crenata BL.) which collected from different areas in Japan, planted at nine university forests and other four stand, in 1990-'91.b. Saplings grown up from cuttings of a select breed aspen (Populus I-245) planted at twenty-six stands of university forests.2. Chemical condions of rainfall, throughfall and stemflow were observed at many points of unversity forests.(1)The most frequency values of the pH of rainfall in forests ranged 4-5, nearly the average data reported by Environment Agency of Japan. There were found values of the pH of rainfall and snowfall in forests are influenced by local human activities.(2)The pH of the throughfall and stemflow were lower and EC of them were greater then the values of rainfall.(3)In generally, the pH stemflow on coniferous trees were greater than the values on broadleaved trees.(4)The ionic concentration of the stemflows increased in autumn and at the after long rainless period.3. The pH and chemical properties of soils at small plots (20*20m) in nutural forests varied complicatedly by location and season.4. The manual of this monitorring composed in 1992 was rewritten in 1995, and new a committee for this project of the Japanese Conference of University Forests started in 1995.

1992年，日本大学森林会议制定了一项长期监测计划，以评估森林的环境退化。本文对大学林100个林分的主要乡土树种的物候进行了调查。为了评估林分的babitat因子，包括以下树木进行调查。日本山毛榉（Fagus crenata BL.）1990 ~ 1991年，在日本的9个大学林和其它4个林分中采集了10株。树苗是从一种精选的白杨（I-245杨）的插枝上长出来的，它种植在大学森林的26个林分上。在大学林的多个点观测了降雨、穿透雨和树干径流的化学条件。（1）森林降雨pH值的最大频率范围为4-5，接近日本环境厅报道的平均值。研究发现，森林降水和降雪的pH值受当地人类活动的影响。（2）穿透雨和树干茎流的pH值低于降雨，EC值高于降雨。(3)In针叶树茎流pH值一般大于阔叶树。（4）在秋季和长时间无雨期后，茎流离子浓度增加.天然林小区（20* 20 m）土壤pH和化学性质随地点和季节变化复杂. 1992年编写的这一监测手册于1995年重新编写，日本大学森林会议于1995年开始为这一项目成立新的委员会。