马尖相思利用价值的研究

The Study on Utilization Value of Acacia mangium

通过木材物理力学性质、木材热值、木材化学性质的测定，树皮单宁的定性、定量分析，树叶饲用成分的分析测定，生物量的测定等得出：木材宜做人造板、细木工、刨切单板等；木材有效热值高，属优质生物质燃料；木材综纤维素含量达７４．５％，适合制浆造纸。４年生树皮单宁含量达３２．８％，纯度８２．４％，属凝缩类，为优质栲胶原料。树叶含粗脂肪３．０％以上，粗蛋白１０％～１４．１７％，含１７种氨基酸，有开发利用饲料的价值。生物量大，４．５年生幼林地上部分生物量达２３．４８ｔ／ｈｍ￣２年；林下土壤０～３０ｃｍ内的有效氮含量比西南桦、山桂花、高阿丁枫三种人工纯林高２．１６％～２．３６％；比天然林高１．８８％～２．１９％，是优良的固氮树种。其经济效益显著，４．５～３．５年生人工纯林投入产出比分别为１：７．３７，１：４．４９。

Based on the data which tested the wood physical property,wood heat value andwood chemical property,the data on qualitive and quantitative analysis of bark tannin,andthe analysis of leaves feed ingredient,he test of biomass,draw a conclusion which the woodsuitable for based panel,cabinet worK,sliced veneer ect.The wood with high heat value,be-long to biological fuel,the content of wood holocellulose is 74.5%,suitable for pulping angpaper manufacture,the content of bark tannin is 32.8% in 4 years old,purity is 82.4% be-longs to condensate which with good quality tannin. The crude fat content is more than 3.0%,the crude protein content is l0%～14.17%,and l7 amino一acid in the leaves is worth devel-opment and utilization. The biomass is large,above ground biomass is 23.48t/hm2a in 4.5years,the soil under the trees 0～30cm which available nitrogen content is 2.16%～2.36%higer than Betula alnoides,Paramichelia baiIlanii,AItingia excelsa and 1.885～2.19% higerthan natural forest.It is nitrogen─gathering tree. with high economic effciency,the input andoutput of 4.5～3.5 years old of pure plantation forest is 1:7.37 and 1:4.49 respectively.