厚荚相思人工林生物量和生产力的研究  

Biomass and Productivity in Acacia crassicarpa Plantation

作　　者：秦武明[1] 何斌[1] 覃世赢 

机构地区：[1]广西大学林学院,广西南宁530004 [2]广西林业勘测设计院,广西南宁530011

出　　处：《西北林学院学报》2008年第2期17-20,27,共5页Journal of Northwest Forestry University

基　　金：科技部农业科技成果转化资金项目(04EFN214500236);广西自然科学基金项目(桂科自0640018);广西“十五”林业科学研究项目(2002-59);广西教育厅科研基金项目(2006-26)

摘　　要：根据广西高峰林场界牌分场4.5 a的定位观测材料,对1.5～4.5 a生厚荚相思人工林的生物量和生产力进行了研究。结果表明,除树叶和活枝外,林分平均木及林分各器官生物量均随林分年龄的增加而增大。1.5、2.5、3.5、4.5 a生的林分乔木层生物量分别为10.64、28.70、42.15、75.45 t·hm^-2,林分乔木层净生产力分别为7.951、16.357、17.145、21.554 t·hm^-2·a^-1,林下植被生物量也有相似的变化趋势。林龄增加,干材、干皮和枯枝的组成比例增加,树叶、活枝、粗根和细根则呈下降趋势。Biomass and productivity in Acacia crassicxrpa plantation were investigated based on the data of position observation during 4. 5 years＇ in Jiepai Branch of Guangxi Gaofeng Forestry Farm. The results showed that except the leaves and the living branches, the biomass of the average trees and their organs increased with the forest age. The tree layer＂ biomass of 1. 5 a, 2. 5 a, 3. 5 a, 4. 5 a stands were 10. 64 t·hm^-2 , 28. 70 t·hm^-2 , 42. 15 t·hm^-2 and 75. 45 t·hm^-2 respectively, and the tree layer＂ productivities of 1.5 a, 2.5 a, 3.5 a, 4.5 astandswere 7.951 t·hm^-2·a^-1, 16. 357 t·hm^-2·a^-1, 17. 145 t·hm^-2·a^-1 and 21. 554 t·hm^-2·a^-1 respectively, meanwhile the biomass of understory vegetation exhibited the same trends. With the increment of the plantation age, the proportion of stem, bark and dead branches increased, while the of leaves, living branches, coarse roots and fine roots presented the negative trends.

关 键 词：厚荚相思 生物量 生产力 

分 类 号：S718.521[农业科学—林学]