草地学报

›› 2000, Vol. 8 ›› Issue (3): 220-225.DOI: 10.11733/j.issn.1007-0435.2000.03.010

• 研究报告 • 上一篇    下一篇

两种土壤类型对羊草生物学特征的影响

王玉辉1,2, 周广胜2   

  1. 1. 中国科学院沈阳应用生态研究所, 沈阳, 110015;
    2. 中国科学院植物研究所植被数量生态学开放研究实验室, 北京, 100093
  • 收稿日期:2000-06-08 修回日期:2000-07-14 出版日期:2000-08-15 发布日期:2000-08-15
  • 基金资助:
    国家重点基础研究专项经费资助项目(我国生存环境演变和北方干旱化趋势预测研究》(No.G1999043407)、国家自然科学基金重点项目(No.39730110)及中国科学院重大项目(KZ951-B1-108)共同资助。

Primary Study on Characteristics of Leymus chinensis in Two Soil Types

Wang Yuhui1,2, Zhou Guangsheng2   

  1. 1. Institute of Applied Ecology, Academia Sinica, Shenyang, 110015;
    2. Laboratory of Quantitative Vegetation Ecology, Institute of Botany, Academia Sinica, Beijing, 100093
  • Received:2000-06-08 Revised:2000-07-14 Online:2000-08-15 Published:2000-08-15

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摘要： 研究两种土壤类型对羊草个体和群落生物学特征的影响。结果表明,在碱化草甸土,羊草的叶宽、净光合速率和气孔导度均低于风沙土型,而单株重则高于后者,而叶长、蒸腾速率和水分利用效率差异不显著。碱化草甸土型羊草的群落密度、地上生物量均高于后者,而根冠比则低于后者。株高、凋落物量及地下生物量在两者间差异不明显,碱化草甸土型羊草群落土壤呼吸及凋落物分解排放的CO2量均高于风沙土型。

关键词: 羊草, 碱化草甸土, 风沙土, 光合作用, 土壤呼吸, 群落生物量

Abstract: Studies on photosynthesis characteristic,soil respiration and biomass(aboveground/belowground)of Leymus chinensis in two soil types had been made in 1999.The results show that(1)Leaf width,net photosynthesis ratio (An)and stomatal conductance(gs)of Leymus chinensis in meadow alkali soil are less than those in wind sand soil,and plants are higher than those in wind sand soil,but leaf length,transpiration rate and water use efficiency have no significant difference in two soil types.(2)Aboveground biomass,density and shoot/root of Leymus chinensis in meadow alkali soil are larger than those in wind sand soil,but belowground biomass has no significant difference in two soil types.(3)CO2 releasing from soil respiration and litter of Leymus chinensis community in meadow alkali soil is more than that in wind sand soil.

Key words: Leymus chinensis community, Meadow alkali soil, Wind sand soil, Photosynthesis, Soil respiration, Biomass

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