南川木波罗幼苗构件生物量和叶片特征随年龄增长的变化  

Leaf traits and biomass dynamics of modular population in different age classes Artocarpus nanchuanensis seedlings

作　　者：贺丽[1] 周旭[1] 刘成[1] 齐代华[1] 蒋宣斌[2] 陈丽洁[2] 

机构地区：[1]三峡库区生态环境教育部重点实验室,重庆市三峡库区植物生态与资源重点实验室,西南大学生命科学学院,重庆400715 [2]重庆市林业科学研究院,重庆400036

出　　处：《广西植物》2014年第4期489-493,共5页Guihaia

基　　金：国家林业局2011年珍稀濒危物种调查监管项目(40500611)

摘　　要：为深入了解南川木波罗构件种群生物量、比叶面积及叶干物质含量随苗龄叶龄的变化规律,以南川木波罗幼苗（1～5年生）为研究对象,分析其根、茎、叶等构件种群的生物量、SLA、LDMC 差异及动态变化.结果表明：（1）单株生物量随着苗龄增加而增加,且差异达显著性水平；（2）各构件生物量增加的幅度不尽相同,其中枝条生物量增长幅度最大,5年生幼苗与2年生幼苗相比达477．23倍,其余构件生物量为主干＞叶＞根；（3）枝条和主干的生物量比率总体上呈上升趋势,所占根比率变动较小而叶逐渐下降.表明植物体对各构件生物量投资的不均衡性,主要偏向于枝和主干；（4）SLA 随着苗龄的增加呈先上升后降低的趋势,且当年生叶大于1年生叶；幼苗叶片干物质含量（LDMC）随苗龄增加而增加,且1年生叶均高于当年生叶.SLA,LDMC and modules dynamics of Artocarpus nanchuanensis in Chongqing were studied systematically. The results showed that with the increase of A .nanchuanensis seedling ages,the biomass of the single A .nanchua-nensis increased significantly,in which the difference of branch biomass was the biggest,the disparity even to 477.23 times between 2 and 5 age seedlings.The reserved modules biomass generally allocated in the order：branch biomass〉leaf biomass〉root biomass.The average biomass distribution rate of stem and branch increased generally,leaf rati-o decreased,root ratio changed small.It showed that the chance to receive biomass varied among different modules. Branches had priority over stems in this aspect.With the increase of A .nanchuanensis seedling ages,the trend of SLA change was increased firstly,then decreased,and SLA of one-year-old leave was higher than those of two-year-old.At the same time,LDMC increased generally,but LDMC of current year leave was higher than those of one year.

关 键 词：南川木波罗 构件种群 生物量 比叶面积 干物质含量 

分 类 号：Q944.3[生物学—植物学]