摘要
【目的】研究广西大明山国家级自然保护区常绿阔叶林中30种藤本植物叶片N、P、K生态化学计量学特征,为丰富群落生态化学计量学提供基础数据。【方法】在大明山天坪站保存完好的常绿阔叶林中设置20m×20m标准样地80块,共3.2ha,在每个标准样地左下角设置5m×5m的小样方,对藤本植物多样性进行调查,根据重要值,采集30种藤本植物叶片,进行叶片N、P、K含量测定。【结果】叶片N、P、K变化范围分别为3.52～54.71、0.21～3.36、0.48～4.23g/kg。各个化学计量因子之间存在一定的线性关系,草质藤本叶片N∶K含量均大于木质藤本,P含量差异不显著。【结论】大明山常绿阔叶林中多数藤本植物是受N或P或N∶P的影响,约30%的种类受到N元素限制,而受到P元素限制的植物相对少;草质藤本叶片比木质藤本有更强的N、K元素存储能力。
[Objective]N, P, K ecological stoichiometry characteristics of 30 kinds of liana leaves in evergreen broad-leaf forest of Daming Mountain national nature reserve of Guangxi were studied to enrich basic data for community ecological stoi- chiometry. [MethodJEighty blocks of 20 m × 20 m standard sample with the total area of 3.2 ha in Tianping station well-pre- served evergreen broad-leaved forest were chosen, and then a 5 m × 5 m plot from every standard sample left bottom was set to observe the diversity of liana. Leaves of 30 lianas were collected for determining the content of N, P, K in the lab based on the important value. [Result] The results showed that contents of N, P and K in leaves were 3.52-54.71 g/kg, 0.21-3.36 g/kg and 0.48- 4.23 g/kg, respectively. The stoichiometric factors had certain linear relationship. N：K content of grass mass vine leaf was higher than that of woody vines, and P content in leaf was not significant differenth among different liana. [Conclusion]Most lianas were influenced by N, P or N：P with about 30% of the species by N element, however, few plants were affected by P element. Grass mass vine leaves gathered more N, K element than woody vines.
出处
《南方农业学报》
CAS
CSCD
北大核心
2013年第5期815-818,共4页
Journal of Southern Agriculture
基金
国家自然科学基金项目(30860059)
