摘要
本区位于浙江省中西部山区。从历史地理角度来看,在7000年前,区内亚热带森林茂密成片,珍稀动植物种类丰富。随着时间的推移,人口数量在激增,人类活动范围在扩大,范围扩大的顺序是:河谷平原→岗地丘陵→低山中山。在此过程中,山林渐遭破坏,珍稀动植物乃至灭绝,水土流失日趋加重,以致生态环境严重恶化。为改善本区生态环境,应树立人与自然共生、协调观念,建立合理的农业结构和作物布局。
Jinhua-Quzhou Region is located in the middle-west of Zhejiang Province between 28°14′-29°41′N and 118°01′-120°47′E, with an altitude of 23-1,452m. It has a land area of 2×10~4km2 more or less (occupying 1/5 of total area of whole Province), that of the mountain area > 2/3. It is a monsoon climatic region of middle subtropical zone. The basic landform assemblage in the region is. plain-hill-low-middle mountain.From the view of historical geography, the evolutive stages of ecologic environment are as following:1) Before 7, 00da-13C, the climate was humid, and evergreen broad-leaved and deciduous-leaved mixed forest of subtropical zone was growing exuberant. In forest, there was herd of elephents, rhinoceros and macaques, etc. Population increased from (10-20)×10~4 in 7C to (60-80)×10~4 in 13C. The human activity expanded from plain to hill and from east to west. There were irrigation works (every work could irrigate 13-20ha) in all villages during 10-13C. The main crop was rise, an silk-knit trand and fishry were quite flourishing. The ecologic environment presented better or' primitive states.2)14-19C, population increased from 200×10~4 in 17C to 300×10~4 in 19C. The human activity had expanded to low-middle mountain. Besieds rise, maize and sweet potato were successfully planted during 16-17C. The forest was destroyed and the hills were getting bare so as- to cause flood, landslide, and water and soil loss, etc. The ecologic environment was clearly worsening, but there were many bears and tigers in the mountainous region.3)Since 20C, population has been nearly 650×10~4. Cultivated land area per capita is about 0. 043ha. The area of bare hills and sparse woods is about 5,930km2. The heavy soil erosion area is up to 3,340km2. The rare wild animals has become extinct. The ecologic environment is getting from bad to bad
出处
《山地研究》
CSCD
1991年第2期73-80,共8页
关键词
金衢地区
生态环境
演变
浙江
Zhejiang Province, Jinhua-Quzhou Region, ecologic environment, evolution,historical geography
