摘要
热带相思为多用途树种,多数种类在华南热带、南亚热带地区的不同类型土壤上表现出较强的适应性。马占相思、厚英相思等3～4年生幼林年平均生长量高2～4m,胸径3～4cm。但热带相思的发展,往往受到低温的制约,其栽培北界一般可到20℃等温线,局部地区可至18℃,而以年积温>7000℃,极端最低年均温5℃以上为其适生范围。 栽培热带相思易达到较高社会效益和经济效益。在农用林业、改良土壤、固氮等方面都能起到良好的作用,不少树种其木材可用作建筑、家具、单板等。木材基本密度460～620kg/m^3,如作为造纸原料,具有广阔的前景。
The tropical acacias are multipurpose trees. Most of them are fast-growing and they have strong adaptability in different soils in the tropical and south subtropical zone of China. At 3~4 years old, the mean annual increament of Acacia mangium and A. crassicarpa reached 2-4 m in height and 3~4cm in D. B. H.. The low temperature is a limiting factor in planting acacias. Their northern boundary of cultivation can reach 20℃ isotherm, some sites may be extended to 18℃ with an annual accumulated temperature of more than 7000℃, absolute minimum temperature is above 5℃. This is the suitable range for planting tropical acacias.Owing to a lot of acacias play a good role for agroforestry, soil improvement and nitrogen fixation, a higher benefits of socioeconomy may easily be achieved by planting tropical acacias. There are a great many of acacias' timber suitable for construction, furniture and veneer etc., its basic density is between 460~620 kg/m3. They can be used as good quality pulpwood of broad-leaved trees.
出处
《林业科学研究》
CSCD
北大核心
1990年第2期155-161,共7页
Forest Research
