Between-Tree and Within-Tree Variation in Specific Gravity and Extractive Content in the Wood of Stercufia setigera Del. Grown in Nigeria  

作　　者：A. O. Oluwadare M. B. Ogunleye 

机构地区：[1]Department of Forest Resources Management, University of lbadan, P.O. Box 9054, U.I. Post Office, lbadan 200005, Nigeria [2]College of Forestry, Forestry Research Institute of Nigeria, Jericho, P.M.B. 5087, Jericho Hill, Ibadan 200005, Nigeria

出　　处：《Journal of Agricultural Science and Technology(B)》2011年第7期1075-1085,共11页农业科学与技术（B）

摘　　要：Variations of wood specific gravity and extractive contents from pith to bark and from base to the top of tree were investigated in a 14-year-old commercial pulpwood species Sterculia setigera Del. Growing in savanna zone in Nigeria. Tree mean specific gravity averaged 0.37; wood at the base had significant higher specific gravity than those at the top while it increased from pith to bark. For extractive content mean value was 1.20% for wood and 1.72% for bark; i[t varied significantly between trees and from base of the tree to the top and from pith to the bark. Extractive content at the butt and breast height is more than double of the value at the top of the tree. The high extractive content at the base is similar to high specific gravity observed for wood samples from the base. Extractive content of the bast was significantly higher than that of the wood. The low specific gravity show possible suitability of the species for paper making in Nigerian paper mills. The wood of Sterculia setigera showed a significant variation between- and within-trees in the two properties considered, though the wood is light with low extractive content; it is however a potential raw material for large scale pulpwood production in Nigeria.

关 键 词：Specific gravity extractive content patterns of variation Sterculia setigera. 

分 类 号：S791.270.4[农业科学—林木遗传育种] S688.1[农业科学—林学]