恢复森林中的多样性和生产力  

Diversity and productivity in restoration forest

作　　者：金红喜[1,2] 袁彩霞 杨占彪[1] 李晓捷[4] 王刚[1] 

机构地区：[1]兰州大学干旱与草地生态教育部重点实验室,甘肃兰州730000 [2]甘肃省治沙研究所甘肃民勤荒漠草地生态系统国家野外科学观测研究站,甘肃民勤733000 [3]宁夏固原市六盘山国营林业局,宁夏固原756401 [4]甘肃农业大学资源与环境学院,甘肃兰州730000

出　　处：《兰州大学学报（自然科学版）》2008年第4期75-80,85,共7页Journal of Lanzhou University(Natural Sciences)

基　　金：国家重点基础研究发展规划项目(2002CB111500);甘肃沙漠综合治理科技创新团队和荒漠区优质樟子松苗木培育及农防林营造技术示范项目(05EFN216200292)资助．

摘　　要：分析了西北黄土高原六盘山国家自然保护区从次生草地到不同恢复时间森林群落的物种多样性和生产力.结果显示:随着恢复,群落内灌木和乔木的多样性、生产力均逐步增加(P<0.001),物种多样性和生产力之间的关系表现为正相关关系.随时间的推移,草本植物的多样性对生产力的相关关系效应增强,而灌木植物的则下降.优势种的特征亦影响多样性和生产力之间的关系(P<0.01).在以针叶树钟为优势种的群落内,多样性和生产力表现为正幂指数函数关系;而在以阔叶树种为优势种的群落内,两者之间不存在显著的相关关系.The dynamic relationship was examined between species diversity, functional group identity and productivity among trees, shrubs and herbs along restoration time and restoration successional gradient in the Liupanshan National Natural Reserve, northwestern Loess Plateau, China. The results showed that along with vascular plant diversity, productivity increases significantly （P〈0.001）, and a positive curvilinear relationship is observed between tile two. Tile relationship between diversity and productivity is positively curvilinear in the coniferous forest（P〈0.01）, but such a relationship disappeared in the broad-leaved forest.

关 键 词：多样性 群落优势种特征 森林生态系统恢复 生产力 恢复演替 

分 类 号：S812.2[农业科学—草业科学]