九寨沟华西箭竹(Fargesia nitida)开花种群特征  

Characteristics of the Flowering Fargesia nitida Populations in Jiuzhaigou

作　　者：雷开明 张跃 肖维阳 蔡永寿 泽军 刘源 孙鸿鸥 曾涛[2] 

机构地区：[1]九寨沟自然保护区管理局,四川阿坝623402 [2]四川大学生命科学学院生物资源与生态环境教育部重点实验室,四川成都610064

出　　处：《四川林业科技》2011年第4期92-95,共4页Journal of Sichuan Forestry Science and Technology

基　　金：九寨沟生态环境与可持续发展国际联合实验室资助;四川大学青年教师科研启动基金资助

摘　　要：2009年4月、7月对九寨沟自然保护区内各样地进行调查,只在鹰爪洞沟3 000 m以上的山坡中上部发现开花的华西箭竹种群分布。调查发现:开花竹种群为典型的下降型年龄结构,表现出明显的衰退种群的特点,约22%～29%的箭竹正在开花。平均花穗密度约为296朵.m-2,平均种子密度约为3 923粒.m-2。华西箭竹的花为顶生的总状花序,花穗颜色以绿色为主,黄色、黄绿色花也较多,偶见绿紫色花。单株花穗数约在10朵～19朵之间,单株种子数在约130粒～250粒之间。平均每朵花穗的种子数约为13粒。Sampling Fargesia nitida was conducted in Jiuzhaigou in 2009 and it was found that the flowered Fargesia nitida populations were distributed on middle and upper slopes of Yingzhuadong at the elevation of 3 000 m and more.The flowering populations showed conspicuous declining characteristics.About 22%~29% of stems were flowering.The mean density of spicae was about 296 seeds·m-2.The mean density of seeds was about 3 923 seeds·m-2.Flowers of Fargesia nitida were raceme.Most of the flowers were green.Yellow and yellow-green ones were less than green ones.The green-purple flowers were the least.There were 10~19 flowers and 130~250 seeds per raceme.The mean number of seeds per flower was about 13.

关 键 词：九寨沟 华西箭竹 开花 种群 

分 类 号：S795.2[农业科学—林木遗传育种]