摘要
热带北界的划分实质上是地球表面地理系统中自然区域（地带）的划分，所采用的区划指标必须全面地反映自然区域的综合性、整体性和渐变性特征。本文运用详尽的景观观测资料，分析了广西自然植被、农业景观、土壤等典型景观的空间变化，确定出热带具体北界：东起梧州浔江谷地北缘，沿大瑶山东南部，经莲花山、大明山、武鸣盆地北缘山地，向西接右江和红水河分水岭，到田林一带与金钟山（云贵高原）相连。
Natural regional division belongs to the earth surface geographical systems. Its dividing parameters must all-sidely reflect the festures of gradual change, comprehensiveness and integrity. Based on the principles of comprehensiveness, origination and field investigation data, the author analyses the spatial change of natural vegetation, soils and agroland -scape in an all-round way. Finally, the north dividing line of tropical zone in Guangxi has been planned as follows: the east end begins at the north boundary line of the Xunjiang river basin on the north of Wuzhou city, then along the southeast part of Dayaoshan mountain, the south part of Ljanhuashan mountain and Damingshan mountain 'c westside, after that tends west and goes through the mountain regions outside the north boundary of the Wuming basin, links with the watershed between Youjiang river and Hongshuine river; when extending to Tianlin county it also links up with the Yungui plateau. This line coincides with the mean temperature 12℃ in January, annual mean temperature 21 ℃ and ≥10℃ accumulative temperature 6500-7000℃ 。 Tropical seasonal rainforests, typical tropic crops and tateritic earth distribute within the zone (Tropic).
出处
《南京大学学报（自然科学版）》
CSCD
1995年第4期685-690,共6页
Journal of Nanjing University（Natural Science）
关键词
热带
热带北界
热带季雨林
tropical zone, the north boundary line of tropical zone, tropical seasonal rainforest, Guangxi
