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应用生态学报 ›› 1998, Vol. 9 ›› Issue (2): 113-118.

• 研究论文 •    下一篇

人工桤柏混交林生态系统的能量特征

彭培好, 王金锡, 胡振宇, 高华东   

  1. 四川省林业科学研究院, 成都610081
  • 收稿日期:1996-08-20 修回日期:1997-08-21 出版日期:1998-03-25 发布日期:1998-03-25
  • 基金资助:

    国家“八五”科技攻关项目(85-19-01-11)

Energy characteristics of alder cypress mixed plantation ecosystem

Peng Peihao, Wang Jinxi, Hu Zhenyu, Gao Huadong   

  1. Sichuan Province Academy of Forestry, Chengdu 610081
  • Received:1996-08-20 Revised:1997-08-21 Online:1998-03-25 Published:1998-03-25

摘要: 对川中丘陵区11年生人工桤柏混交林生态系统能量特征的研究表明,植物热值含量随植物种类、器官、分布层次以及季节等的变化而变化;生态系统的能量现存量为237.53×1010J·hm-2,每年以凋落物形式归还的能量为7.55×1010J·hm-2·a-1,其中凋落叶是系统能量归还的主要形式,其能量归还量占能量归还总量的70.29%;生态系统能量净固定量为26.73×1010J·hm-2·a-1,能量转化效率为2.34%,可见人工桤柏混交林具有较高的能量固定能力和太阳能转化效率.

关键词: 桤柏混交林, 能量特征, 能量转化效率, 养分, 地理种源, 温度耐性, 栓皮栎, 非结构性碳水化合物

Abstract: Studies on the energy characterisitcs of 11 years old alder-cypress mixed plantation ecosystem in hilly area of central Sichuan Province show that the caloric value of plant varied with species, organs, distributive layers and seasons. The standing energy storage of the ecosystem was 237.53 ×1010 J·hm-2, and the energy return in the form of litterfall was 7.55×1010 J·hm-2 ·yr. -1, 70.29% of which was in the form of leaf fall. Net energy fixation was 26.73×1010 J·hm-2 ·yr. -1, and energy conversing efficiency was 2.34%. It is suggested that the alder-cypress mixed plantation is an ecosystem with high energy fixation and high energy conversing efficiency.

Key words: Alder-cypress mixed plantation, Energy characteristics, Energy conversing efficiency, nutrient, non-structural carbohydrate, Quercus variabilis, provenance, thermal tolerance