广西桉树人工林物种多样性与生物量关系  

Relationship between Species Diversity and Biomass of Eucalyptus Plantation in Guangxi

作　　者：温远光[1] 陈放[2] 刘世荣[3] 梁宏温[1] 元昌安[4] 朱宏光[1] 

机构地区：[1]广西大学林学院,南宁530004 [2]四川大学生命科学学院,成都610064 [3]中国林业科学研究院,北京100091 [4]广西师范学院,南宁530001

出　　处：《林业科学》2008年第4期14-19,共6页Scientia Silvae Sinicae

基　　金：国家教育部留学回国人员科研启动基金项目(1997-832);广西区林业局项目资助

摘　　要：对广西东门桉树人工林18个试验小区物种多样性、群落总生物量、乔木层生物量和林下植被生物量进行研究。结果表明:1)桉树人工林物种丰富度与乔木层、灌草层和群落总生物量呈极显著正相关(α=0.001),相关系数分别为0.6935、0.7028和0.7106;2)叶面积指数与物种丰富度和林下植被生物量均表现为极显著正相关(α=0.001),相关系数分别为0.7310和0.6856;3)乔木层生物量与土壤有机质、土壤水解N以及物种丰富度与土壤有机质有较强的相关性,相关系数分别为0.6416、0.6203和0.6359,在0.1水平上达到显著;林下植被生物量与9种土壤养分的相关性均较小,相关系数在0.4以下。以上结果表明:桉树人工林物种多样性的增加有利于林分生物量的提高;叶面积指数和土壤有机质在小尺度上的变化对桉树人工林的物种丰富度和生物量影响较大。To reveal the relationship between species diversity and biomass in Eucalyptus （Eucalyptus urophylla × E. grandis） plantation that located in the Dongmen State Forestry Farm of Guangxi, 18 sample plots were established and the total biomass, arbor layer biomass and undergrowth biomass of communities were subsequently harvested. The results were as follows ： 1 ） Species richness in eucalypt plantation had remarkable positive correlation with biomass of arbor layer, undergrowth and community（α = 0.001 ）, its correlation coefficients was 0.693 5, 0.702 8 and 0.710 6 respectively. 2） LAI （ leaf area index） had remarkable positive correlation with species richness and undergrowth biomass（α = 0.001 ）, its correlation coefficients was 0.731 0 and 0.685 6 respectively. 3） Arbor layer biomass had remarkable correlation with soil organic matter and hydrolysable N, its correlation coefficients was 0.641 6 and 0.620 3 respectively. Species richness had remarkable correlation with soil organic matter and correlation coefficient was 0.635 9. Among them, correlation was significant at the 0.1 level. Under growth biomass had little correlation with nine soil nutrients and correlation coefficients was under 0.4. To sum up, species diversity was advantageous to the promotion biomass of Eucalyptus plantation, and the variation of LAI and soil nutrient in small-scale could result in the difference of species diversity and biomass in different sample plots.

关 键 词：桉树人工林 物种多样性 生物量 土壤养分 叶面积指数 

分 类 号：S718.54[农业科学—林学]