摘要
以桂林岩溶石山主要灌丛类型:紫凌木灌丛Decaspermum esquirolii Shrub、木灌丛Loropetalumchinense Shrub、龙须藤灌丛Bauhinia championii Shrub、小果蔷薇灌丛Rosa cymosa Shrub、红背山麻杆灌丛Alchornea trewioides Shrub为研究对象,采用群落学调查法研究这5种灌丛类型地上生物量分配特征。结果表明:5种灌丛类型地上生物量大小顺序为:紫凌木灌丛>小果蔷薇灌丛>龙须藤灌丛>木灌丛>红背山麻杆灌丛,生物量分别为:29.48 t/hm2,18.76 t/hm2,15.18 t/hm2,9.78 t/hm2,7.54 t/hm2。5种灌丛群落地上生物量平均为16.15 t/hm2,不同层次生物量大小顺序为:灌木层>枯枝落叶层>草本层,各自生物量占地上生物量的比例分别为81.67%、11.89%和6.44%。对于5种灌丛类型建群种生物量所占各自灌丛灌木层生物量的比例而言,其大小顺序为:红背山麻杆>木>小果蔷薇>龙须藤>紫凌木。
Aboveground biomass and its allocation of main shrub types of Decaspermum esquirolii Shrub, Zoropetalum chinense Shrub,Bauhinia championii Shrub, Rosa cymosa Shrub, and Alchornea trewioides Shrub were investigated in Karst hills of Guilin based on field measurement. The results showed that sequence of the aboveground biomass of the five shrub types were as follows：Decaspermum esquirolii Shrub 〉 Rosa cymosa Shrub 〉 Bauhinia charnpionii Shrub 〉 Zoropetalum chinense Shrub 〉 Alchornea trewioides Shrub and the aboveground biomazs were 29. 48 t/hm2,18. 76 t/hm2,15. 18 t/hm2,9. 78 t/hm2 and 7. 54 t/hm2, respectively. For the five shrub types, the average of aboveground biomass of were 16. 15 t/hm2,the sequence of biomass in different layers were as follows ：shrub layer〉litter layer〉herb layer, and the percentage of the shrub layer biomass account for 81. 67%, 11. 89% and 6.44%, respectively. As for the percentage of the constructive specie which accounted for shrub layer, the sequence as follows ：Alchornea trezoioides〉 Loropetalum chinense〉 Rosa cymosa〉 Bauhinia championii〉 Decaspermum esquirolii.
出处
《广西师范大学学报（自然科学版）》
CAS
北大核心
2009年第4期95-98,共4页
Journal of Guangxi Normal University:Natural Science Edition
基金
"十一五"国家科技支撑计划项目(2006BAD03A100302)
国家重点基础研究计划项目(2006CB403207)
广西师范大学博士启动基金
广西环境工程与保护评价重点实验室研究基金(桂科能0802K011)
广西教育厅立项项目(200807LX020)
