摘要
利用生态学方法,对湖北省宣恩县的利川润楠(Machilus lichuanensis Cheng ex S.Lee)天然种群和群落特征进行调查分析。结果表明,宣恩县的利川润楠群落物种丰富,有维管束植物101种,隶属于51科90属;利川润楠种群数量虽多,但结构不合理,处于更新层的幼苗和幼树总体上所占比例较小,且在各样地分布不匀;调查范围内的利川润楠种群均缺少足够的演替层;种群对坡度、坡位、坡向、海拔等生态因子具有选择性,海拔700~1 050 m的山地下坡位、阴坡坡向更适合利川润楠的生长。根据调查结果,进一步分析了利川润楠的濒危原因,并提出了相应的保育对策。
Ecological investigations were adopted to analyses the community characteristic and population characteristic of Machilus lichuanensis Cheng ex S. Lee. The result showed that, there were abundant plant species in M. lichuanensis com-munities, including 101 vascular plant species from 90 genera of 51 families. Among all the M. lichuanensis communities in Xuan′en county, M. lichuanensis was a lot in quantity and was not uniform in distribution in sample plots involved in this investigation; However, its population structure was unsatisfactory, for example, in M. lichuanensis communities, the amount of M. lichuanensis was little in shrub layer and was absent in succession layer; The natural populations of M. lichuanensis exhibited preference for slope, aspect, slope position and altitude; and it grew well at the broken bits and shady slope of the mountains at the altitude from 700 to 1050 m. Based on the above results, the gradual endangered mechanism of M. lichuanensis was discussed and some significant conservation strategies were proposed.
出处
《湖北农业科学》
2017年第6期1085-1089,共5页
Hubei Agricultural Sciences
基金
湖北省科技支撑计划项目(2013BBB24)
长江大学青年基金项目(2015cqn80)
