植物分布与土壤和区域气候关系有规律结合的实例分析

植物的分布和组合与所在地土壤和区域气候有着密切关系。从广西阳朔县高田乡沙子溪村后山所记录到的翻白叶树+瓦山栲-红皮-罗伞树+九节木-汝蕨群丛充分反映出这一点。群落中在南亚热带地区广泛分布的种类最多,无论从种数或林木重要值指数拥有量来看,它都占据一半以上,在中亚热带地区广泛分布的种大约也占到近1/3,充分说明群落的南亚热带性质明显,并具有向中亚热带过渡的特点。总的说来,喜欢生长在石灰岩土和酸性土的植物总数及其林木重要值指数拥有量几乎处于相差无几的地位,但前者种数稍少,但林木重要值指数拥有量和幼树、幼苗与灌木株数稍多。由于地表土壤大多呈酸性反映,因此,喜欢酸性土的草类较多,真正好钙性的草类很少。

An example analysis of regular integration relating plant distribution to soil and regional climate

Plant distribution mostly has close relation to soil and regional climate of the location. Pterospermum heterophyllum+Castanopsis ceratacantha-Styrax suberifolia-Ardisia quinquegona+Psychotria rubra-Arachniodes rhomboidea Association recorded on the Yangshuo,Guangxi obtains full reflection. In this Association,species,which widely distributed in South subtropics,occupy above half both from species number and possession of importance value index,fully showing South subtropics nature of the community. In the meantime,species,which widely distributed in the Central subtropics,occupy about one third,obviously reflecting transitional nature of the community. On the whole,there is hardly any difference between calciphile and acidophile both in species number and possession of importance value index. In some case,calciphile is fewer than acidophile in species number,but is more than acidophile in importance value index possession of trees and individuals of undergrowth,sapling and seedling. Most of herbs are difficult to directly grow in limestone rocks. In surface of soil mostly appears acidic reaction,therefore,real calciphile is very few.