喀斯特适生植物小蓬竹不同龄级种群的构件特征  

Study on Population Modules Characteristics in Different Age Classes of Karst Plant Drepanostachyum luodianense

作　　者：谢元贵 杨泊 陈洪 刘济明[3] 

机构地区：[1]贵州省喀斯特资源环境与发展研究中心,贵州贵阳550001 [2]贵州省铜仁市林业局,贵州铜仁554300 [3]贵州大学林学院,贵州贵阳550025

出　　处：《贵州农业科学》2011年第4期167-169,共3页Guizhou Agricultural Sciences

基　　金：贵州省国际科技合作计划"濒危植物小蓬竹生态适应性及育苗技术研究"[黔科合外G字(2009)700101];贵州省科技基础条件平台课题"贵州喀斯特生态综合治理技术创新能力建设"[黔科合院所创能[(2010)4001];贵州省科学技术基金项目"采煤塌陷对百里杜鹃景区植被影响机理研究"[黔科合J字(2010)2052];国家科技支撑计划项目子课题"中度石漠化环境速生高效林灌草种植与生态演替诱导技术"(2006BAC01A09-2)

摘　　要：为了对小蓬竹种群和群落动态发展演化机理提供参考,运用Harper构件理论对不同龄级喀斯特适生植物小蓬竹种群构件进行了研究。结果表明:小蓬竹种群进行同化过程中是以Ⅱ龄级、Ⅲ龄级为主,在人为经营控制小蓬竹林分时,Ⅱ龄级、Ⅲ龄级应是经营主体;小蓬竹分株地径粗度是由竹笋的大小决定的,一般在0.7 cm附近;分株枝条长度、节长、节数的变化则是呈现典型的S形生长曲线;自然整枝高度随着年龄的增加、种群内部竞争的日趋激烈而逐渐增高,同时杆枝上最多分枝数随着年龄的增加、种群内部竞争日趋激烈而逐渐减少。Population modules in different age classes of Karst plant Drepanostachyum luodianense were studied by Harper＇s modular theory to provide basis for population and community dynamics principle of D.luodianense.The results showed that the 2nd and 3rd classes were the major classes during the assimilation process of D.luodianense module population.Therefore the 2nd and 3rd age-classes should be the main operational object in artificial forest stand control.Clonal ramets ground diameter was determined by the bamboo shoots size（generally about 0.7 cm）.The changes of branche length,knots length,and knots number appeared the typical S-shaped growth curve.Natural pruning height raised gradually along with the increase of age and fierce internal population competition,while the maximum branches on stalk decreased.

关 键 词：小蓬竹 无性系种群 构件 龄级 

分 类 号：S795[农业科学—林木遗传育种]