人工花棒林植物群落数量特征的初步研究  

Study on Quantitative Characteristics of Artificial Hedysarum scoparium Plant Communities

作　　者：刘丽丹[1] 张娜[1] 

机构地区：[1]宁夏大学农学院,宁夏银川750021

出　　处：《河南农业科学》2015年第10期132-135,共4页Journal of Henan Agricultural Sciences

基　　金：国家973计划前期研究资助项目(2010CB434805);宁夏大学自然科学基金项目(ZR1266)

摘　　要：为了探讨干旱风沙区营造人工花棒(Hedysarum scoparium)林对退化沙地土壤改良及植被的恢复作用,2013—2014年,对白芨滩国家级自然保护区7、19、24、30、35年生人工花棒林植物群落的数量特征进行初步研究。结果表明,随着人工花棒林生长年限的增加,植物群落组成趋于丰富,结构趋于复杂。群落组成逐渐由人工种植的灌木树种演变为以草本、灌木结构为主的植物群落,且优势种的重要值也发生了较大变化。从生活型组成看,植物种从以沙生、1年生草本植物和灌木占优势地位,逐步让位于耐旱、抗风蚀的多年生草本和灌木植物。Shannon-Wiener多样性指数表明:从7年生、19年生至24年生花棒群落呈现增加趋势,之后从30年生至35年生花棒群落又逐渐降低,最低是7年生花棒群落,最高是24年生花棒群落。Simpson优势度指数的变化趋势是从7年生至35年生花棒群落呈现显著下降趋势。而在各花棒群落间Pielou指数均差异不显著。说明随着人工花棒林植物群落的演替,群落的组成结构趋向均匀和稳定。The quantitative characteristics of 7,19,24,30,35 years old Hedysarum scoparium community in the sandy land in Baijitan Nature Reserve were studied to discuss the role of Hedysarum scoparium plantation for the improvement of degraded sand land and the recovery of vegetation in the arid aeolian sand region from 2013 to 2014. The results showed that with the increase of the plantation ages,the com- munity component got more abundant, and the structure became more complex. The composition of the plant communities changed gradually from artificial planting shrub species to herb-shrub dominant spe- cies,and the important value of dominant species changed considerably; the plant structure showed a complex vertical stratification. The life forms of the plant species in communities also changed. The plant species in the communities changed from sandy adaptive annual herbs and shrubs to drought and wind e- rosion tolerant perennial herb and shrub species. With the increase of the plantation ages, Shannon-Wiener diversity index first increased and then decreased,and reached the highest value in 24-year-old Hedysar- um scoparium community and lowest value in 7-year-old Hedysarum scoparium community;Simpson domi- nance index decreased significantly;Pielou index was not significantly different among different years old Hedysarum seoparium community. The above results indicated that as the succession of artificial Hedysar- um scoparium community,community structure was tend to uniformity and stability.

关 键 词：花棒 群落 生活型 多样性 

分 类 号：S793.9[农业科学—林木遗传育种]