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中国沙漠 ›› 2005, Vol. 25 ›› Issue (4): 525-528.

• 研究论文 • 上一篇    下一篇

沙漠人工植被区土壤呼吸初探

张志山, 谭会娟, 王新平, 张景光, 周海燕, 李新荣   

  1. 中国科学院寒区旱区环境与工程研究所沙坡头沙漠试验研究站, 甘肃兰州 730000
  • 收稿日期:2004-03-09 修回日期:2004-04-13 出版日期:2005-08-20 发布日期:2005-08-20
  • 作者简介:张志山(1974-),男(汉族),甘肃古浪人,博士研究生,主要从事干旱区生态的研究。E-mail:zhangzhsh2002@yahoo.com.cn
  • 基金资助:
    国家自然基金(40301008,40401004和40471006)资助

Primary Discussion on Soil Respiration in Artificially Re-vegetated Desert Area

ZHANG Zhi-shan, TAN Hui-juan, WANG Xin-ping, ZHANG Jing-guang, ZHOU Hai-yan, LI Xin-rong   

  1. Shapotou Desert Experimental Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2004-03-09 Revised:2004-04-13 Online:2005-08-20 Published:2005-08-20

摘要: 2003年9月底,在沙坡头铁路北面的1956年、1964年、1981年和1987年始植的人工植被区和流动沙丘的迎风坡,分别在阴天、晴天和雨后用CI301SR测定土壤呼吸速率,结果表明:土壤呼吸速率在各样地间、日期间和互作均达到极显著水平;尤其是雨后样地间的差异非常明显。1956年始植、1964年始植、1981年始植、1987年始植样地和流沙不同天气状况下的平均土壤呼吸速率分别为-0.1537μmol·s-1·m-2、-0.0995μmol·s-1·m-2、-0.0583μmol·s-1·m-2、-0.0754μmol·s-1·m-2和-0.0336μmol·s-1·m-2;阴天、晴天和雨后不同样地的平均土壤呼吸速率分别为-0.0342μmol·s-1·m-2、-0.0778μmol·s-1·m-2和-0.1403μmol·s-1·m-2。在沙漠人工植被区,影响土壤呼吸的主要因子是水分,其次是温度与植物群落类型和发育阶段。

关键词: 沙漠, 人工植被区, 土壤呼吸

Abstract: The experiment based on CI-301SR aims to determine the soil respiration in windward of moving sand dune and in vegetation lands which were re-vegetated in 1956, 1964, 1981 and 1987. The observations were conducted on cloudy day (September18th), sunshine day (September 20th) and post-precipitation day (October 1st) in September 2003. The results showed that soil respirations among plots, among dates and interactions are very significantly variant (P < 0.01), especially on post-precipitation day. The average soil respiration rates of plots which were re-vegetated in 1956, 1964, 1981 and 1987, and of bare desert are -0.1537 mol·s-1·m-2, -0.0995 mol·s-1·m-2, -0.0583 mol·s-1·m-2, -0.0754 mol·s-1·m-2 and -0.0336 mol·s-1·m-2, respectively. The average soil respiration rates on cloudy, sunshine and post-precipitation day are -0.0342 mol·s-1·m-2, -0.0778 mol·s-1·m-2 and -0.1403 mol.s-1·m-2 in order. Soil water plays the dominant role on soil respiration in re-vegetated desert area, while temperature and the type and phrase of plant community are secondary.

Key words: desert, re-vegetated area, soil respiration

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