广西大青山石灰岩山土壤理化性质的演变及其造林绿化

研究得知:该范围的石山(石灰岩山)上,在北热带气候及植被条件相互作用下,演变为一类特别肥沃的土壤——石灰土;该类土壤有机质及氮素丰富,保蓄水性能强;钙、镁、钾、铁、锰、锌等元素含量也十分丰富,故称“热带黑钙土”;石山石多土少,整体环境恶劣,而局部生境却十分优越,又因该区雨量充沛,即使石山中的石缝、石槽内,只保存5％土质,上面就会覆盖较繁茂的草、灌植被,其中不少具有较高的经济价值,同时,也易于栽培喜钙、喜肥的优良或珍贵树种。

THE EVOLUTION OF PHYSICAL AND CHEMICAL PROPERTIES OF THE SOIL AND AFFORESTATION AT LIMESTONE HILL AREA IN DAQING MOUNTAIN

The results obtained from this study indicate that a kind of very fertilized soil named limestone soil, can be evolved from the parent rock of limestone under the interactions of northern tropical climate and vegetation condition, which is abundant in organic matter, nitrogen and other nutrients, such as calcium, magnesium, potassium, iron, manganese, zinc etc, and also has a high waterholding capacity. Therefore it is called"Tropical chernozem". The entire environment is very poor because of little soil with large quantity of stone in this area, but certain limited is exellent so that lush grasses and shrubs of which most have important economic value can grow on the rock caves and cracks covered with only 5% soil. Meanwhile other precious or valuable tree species which are calcipete, fertile and suitable in site can be planted easily.