扎龙湿地不同生境芦苇分株的形态特征及生物量分配的异速关系
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齐齐哈尔大学 生命科学与农林学院

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黑龙江省省属高等学校基本科研业务费科研项目(135509130)


Morphological traits and allometric relationships of biomass allocation of Phragmites australis ramets in different habitats in Zhalong wetland
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College of Life Science and Agriculture,Forestry ,Qiqihar University

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    摘要:

    不同环境条件下的植物个体可以表现出形态特征的分异和物质分配的权衡与调整。采用大样本抽样调查与统计分析方法,比较研究扎龙湿地不同生境芦苇(Phragmites Australis)生殖株和营养株的形态特征以及生物量分配的异速关系。结果表明:在9月末,盐碱生境、旱生生境、湿生生境和水生生境芦苇分株的生长表现出较大的生态可塑性,株高和株重均以盐碱生境最小,水生生境最大,最大值与最小值的比值分别为1.3—3.3和1.8—5.1,分株生长在种群间的变异度高于种群内,与营养株相比,生殖株的变异度较低;分株的支持分配与生产分配的比值为1.8—4.2,生产分配以盐碱生境最高,以水生生境最低,而支持分配和生殖分配表现与生产分配相反的序位;生殖株的花序长和花序重与株高间呈直线函数形式增长,株高和株重低于种群平均值的20%和35%的分株不进行有性生殖;叶重、叶鞘和茎重以及分株重与株高间呈幂函数形式的异速生长关系。植物通过改变个体的形态特征以及调整构件间生物量分配适应不同环境,而受遗传因素控制的构件间生长关系却相对稳定。

    Abstract:

    The plants under different environmental conditions showed the differentiation of morphological traits and the trade-offs and adjustment of material allocation. A comparative study was performed on morphological traits and allometric relationships of biomass allocation of reproductive and vegetative ramets of Phragmites australis in different habitats in Zhalong wetland using a large sample survey and statistical analysis.The results showed that the growth of ramets of P. australis had great ecological plasticity in the saline-alkali habitats, xeric habitats, wet habitats and aquatic habitats on the end of September, the height and weight of ramets of P. australis in these four habitats were largest in the aquatic habitat and smallest in the saline-alkali habitat, the ratio of maximum values and minimum values of height and weight of ramets within the habitat were 1.3—3.3 and 1.8—5.1, the variation of reproductive ramet was lower than that of vegetative ramet;The ratio of supportive allocation and productive allocation of ramets was 1.8—4.2 , and the productive allocation of ramet was highest in saline-alkali habitat and lowest in aquatic habitat, supportive allocation and reproductive allocation were the opposite order to productive allocation, the relationship between length and weight of inflorescence and height of reproductive ramet was a linear function, and height and weight of ramet less than 20% and 35% of the population average could not had sexual reproduction; The relationship between leaf weight, leaf sheath and stem weight, and ramet weight and ramet height was a power function allometric scaling relationship. Plants adapt to the different environment by changing morphological traits and adjusting the material distribution among modules, and the growth relationship among modules controlled by genetic factors was relatively stable.

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焦德志.扎龙湿地不同生境芦苇分株的形态特征及生物量分配的异速关系.生态学报,,(). http://dx. doi. org/10.5846/stxb202108232349

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