摘要
冷箭竹林的草本地被层结构随着冷箭竹生命周期的发展和微生境的变化，其组成植物呈现出“少—多—少”的动态格局，且表现出糙野青茅—提灯藓→小悬钩子＋宝兴马先蒿＋无尾果＋林地早熟禾－泥炭藓→山酢酱草＋糙野青茅—提灯藓的演替模式。幼竹林的竹子种群密度为９４．４株／ｍ２，是老竹林竹子种群密度的１．５９倍，而竹子的种群生物量仅３５４．９３７ｋｇ／ｈｍ２，仅为老竹林的８％。我们从未发现大熊猫取食其林内的冷箭竹，它主要取食老竹林的竹笋，２年生、３年生竹秆和少量的竹枝。研究地区共有红桦—冷箭竹林、糙皮桦—冷箭竹林和岷江冷杉—冷箭竹林三种林分类型。
おith the development of arrow bamboo′s life cycle and the change of microhabitat,the floristic composition of herb ground covers shows the dynamic pattern of 'little—many—little',and its successional model is Deyeuxia scabrescensMinum sp.->Rubus nutans+Pedicuiaris moupinensis+Coluria longifolia+Poa nemoralisSphagnun cymbifalium->Okalis qriffithii+Deyeuxia scabrescens-Minum sp. .The bamboo population density is 94.4 culm/m2 in young bamboo forest,which is 1.59 times of old bamboo forest.The bamboo biomass of young bamboo forest is 354.937kg/hm2 and it is eight percentage of old bamboo forest.It is found that the bamboo is not eaten by giant pandas,giant pandas′ foods are the sprouts,2-3 years old bamboo stems and branches in old bamboo forest.There are three forest types of Betula albosinensis-Bashania fangiana forest,B.utilisBashania fangiana forest and Abies FaxonianaBashania fangiana forest in Wolong Nature Reserve.
出处
《四川林业科技》
北大核心
1998年第2期1-6,共6页
Journal of Sichuan Forestry Science and Technology
关键词
冷箭竹林
林分动态
结构
种群密度
生物量
Arrow bamboo(Bashania fangiana)forest,Forest dynamic and structure,Population density and biomass,Giant panda′s(Ailuropoda meianoienca)feeding active
