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芒萁生物量分布特征

刘迎春;刘琪璟1;汪宏清1;马泽清1,2;徐雯佳1,2   

  1. 1中国科学院地理科学与资源研究所, 北京 100101;2中国科学院研究生院, 北京 100049
  • 收稿日期:2007-07-17 修回日期:1900-01-01 出版日期:2008-05-10 发布日期:2008-05-10

Characteristics of biomass allocation of Dicranopteris dichotoma.

LIU Ying-chun1,2;LIU Qi-jing1;WANG Hong-qing1;MA Ze-qing1,2;XU Wen-jia1,2   

  1. 1Institute of Geographic Science and Natural Resources Research, Chine
    se Academy of Sciences, Beijing 100101, China;2Graduate University of Chi
    nese Academy of Sciences, Beijing 100049, China
  • Received:2007-07-17 Revised:1900-01-01 Online:2008-05-10 Published:2008-05-10

摘要: 以花岗岩和紫色砂页岩典型丘陵区的芒萁(Dicranopteris dichotoma)为研究对象,从生物学角度分析了其生物量分布的基本特征。结果表明:各样方间总生物量变化不大,生境条件是影响芒萁地下与地上生物量分配的重要因素,自坡上到坡下,地上生物量升高,地下生物量降低;芒萁叶生物量模型,以展幅的乘积(D1·D2)和株高(H1)为自变量建立的多元线性方程的相关性最好;芒萁根系集中分布在0~4 cm的土层内,其中1 cm附近最为集中,但砂土堆积导致其分布加深并成层分布;芒萁活根状茎长度与土壤深度呈负相关,与根系生物量呈线性正相关;芒萁是南方山区既经济又有效的水土保持植物,应大力加强保护和应用。

关键词: 二点叶蝉, 生命表参数, 寄主

Abstract: From biological aspect, this paper studied the basic characteristics of biomass allocation of Dicranopteris dichotoma in typical hilly area with granite and purple sandy shale. The results indicated that the total biomass of D. dichotoma had less difference among the sampling sites, but the allocation of above and under-ground biomass was different, being mainly affected by environmental conditions. The aboveground biomass increased, while underground biomass decreased from the top to the bottom of the hill. Among the models of D. dichotomabiomass allocation, those with the product of crown breadth (D1·D2) and plant height (H1) as independent variable were best fitted. The rhizome ofD. dichotoma mainly distributed in 0-4 cm soil layer, with most at around 1 cm depth. However, sandy soil deposition made the rhizome distributed deeper and in stratification. The length of living rhizome had a negative correlation with soil depth, and a linear correlation with root biomass. In mountainous area of South China, D. dichotoma is an economic and effective plant for water and soil conservation, and thus, its protection and application should be enhanced.

Key words: Cicadulina bipunctella, Life table parameters, Host plants