天然罗布麻种群生殖分株数量特征  

Quantitative Characters of Reproductive Ramets in Apocynum venetum Population

作　　者：张秀玲[1] 

机构地区：[1]德州学院生物系,山东德州253023

出　　处：《干旱区研究》2008年第5期668-672,共5页Arid Zone Research

基　　金：山东德州市科学技术攻关项目(042104)

摘　　要：通过对野生罗布麻生殖分株大样本取样的调查与测定,研究了华北平原罗布麻种群生殖分株的数量特征。结果表明:在籽粒完熟期,罗布麻种群单个分株重为(10.38±7.78)g,蒴果生物量和蒴果数分别为(1.57±1.59)g和(7.60±6.56)枚;种子生物量和种子数分别为(0.34±0.33)g和(582.28±558.74)粒;蒴果生物量、蒴果数、种子生物量、种子数分别与分株总生物量呈极显著的(P<0.01)线性正相关关系;蒴果数、种子数与茎叶生物量分配呈极显著的(P<0.01)线性负相关关系;单蒴果的重量、种子重、种子数、种缨重分别与蒴果的长度呈极显著的(P<0.01)幂函数正相关关系。罗布麻种群生殖分株的各构件组成之间具有较强的变化规律。According to the investigation and measurement of a large amount of random samples collected from single dominant species community in the North China Plain, in this paper the quantitative characters of reproductive ramets of Apocynum venetum at ripening stage are studied. The results show that the weight of each reproductive ramet of A. venetum population is （ 10.38 ± 7.78） g, the biomass and number of capsules are （ 1.57 ± 1.59） g and 7.60 ± 6.56, and the biomass and number of seeds are （0.34 ±0.33） g and 582.28 ±558.74, respectively. There are the most significant positive correlations between the biomass and number of capsules and seeds and the total biomass of ramets （P 〈0. 01 ）, which can be described by linear equation; there are the most significant negative correlations between the number of capsules and seeds and the allocation of stem and leaf; there are also the most significant positive correlations among the weight of capsules and seeds, seed tassel, number of seeds and length of capsules in single capsule （P 〈0.01 ）, which can be described by power function. There are the obvious change laws among reproductive ramets.

关 键 词：罗布麻(Apocynum venetum) 生殖分株 构件 种子数 生物量 

分 类 号：S563.7[农业科学—作物学] S567.239