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植物研究 ›› 1998, Vol. 18 ›› Issue (1): 128-136.

• 论文 • 上一篇    

裂叶沙参个体生长动态研究(2):根系的生长动态

张文辉1,2, 祖元刚1   

  1. 1. 东北林业大学植物生态学开放研究实验室, 哈尔滨 150040;
    2. 圣卡罗斯联邦大学植物学系, 圣卡罗斯巴西
  • 收稿日期:1997-03-10 出版日期:1998-03-15 发布日期:2016-06-14
  • 基金资助:
    国家自然科学基金"八五"重大项目资助(39391500)。

STUDY ON THE INDIVIDUAL GROWTH DYNAMIC OF ADENOPHORA LOBOPHYLLA——THE ROOT SYSTEM GROWTH DYNAMIC IN THE LIFE SPAN

Zhang Wen-hui1,2, Zu Yuan-gang1   

  1. 1. Open Research Laboratory of Forest Plant Ecology, Northeast Forestry University, Harbin 150040;
    2. Botanical Department, Federal University of Sǎo Carlos, Brazil
  • Received:1997-03-10 Online:1998-03-15 Published:2016-06-14

摘要: 在裂叶沙参分布区金川县调查了29块样地和1502个不同年龄个体的根系空间结构和生物量,对5个生长于不同海拔区域的种群进行了比较,分析了影响根系发育的环境因素。生长于海拔2700~2900m种群根系发育完整,主根、侧根、二次侧根、细根生物量和体积均达到最高值。高于或低于这一海拔区域,种群根系发育不够充分。主要原因在低海拔地区是干旱和外界极度干扰;在高海拔地区是低温。各种群总合的根系生物量(Y,g)与年令(x,年)关系可以用公式:Y=0.003783X1.7953。其他分布于海拔2300m到3400m的5个种群生物量(Y, g)与年龄(x,年)关系可用一般公式:Y=a.xb表示。

关键词: 裂叶沙参种群, 根系生长, 生物学特征, 生物量

Abstract: In the distribution area, Jinchuan county, of Adenophora lobophylla Hong.population, 29 sample plots were investigated.The root system spatial structure and biomass of 1502 individuals with different ages were studied, and 5 populations at different altitudes were compared.The environmental factors which influence the root system development were analyzed too.The root system of the population at altitude of 2700-2900m could develop fully, the biomass and size of taproot, lateral root, secondary lateral root, thin root all reach the maximum.If the habitat is higher or lower than this altitude, the root systems of the population could not develop well.The most principal reason for the underdevelopment at the lower altitude was assumed to be drought and external extreme disturbance, and at the higher altitude was assumed to be low temperature.The relation between root system biomass growth(y, g) and ages(x, year) could be expressed by the equation:y=0.003783x1.7953 for the whole population, and for the other 5 populations from altitude of 2300m to 3400m could be expressed by the general equation:y=a·xb.

Key words: Adenophora lobophylla population, Root system growth, Biological characteristics, Biomass