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中国沙漠 ›› 2010, Vol. 30 ›› Issue (4): 844-849.

• 生物土壤与生态 • 上一篇    下一篇

科尔沁沙地3种灌木凋落物分解速率及其与关键气象因子的关系

曲 浩1, 赵学勇1, 赵哈林1, 王少昆1, 李衍青1, 刘志国2   

  1. 1.中国科学院 寒区旱区环境与工程研究所, 甘肃 兰州 730000; 2.巴彦淖尔林业研究所, 内蒙古 巴彦淖尔 015000
  • 收稿日期:2009-10-07 修回日期:2009-12-09 出版日期:2010-07-20 发布日期:2010-07-20

Litter Decomposition Rates of Three Shrub Species in Horqin Sandy Land and Their Relationship with Key Meteorological Factors

QU Hao1, ZHAO Xue-yong1, ZHAO Ha-lin1, WANG Shao-kun1, LI Yan-qing1, LIU Zhi-guo2   

  1. 1.Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China; 2.Bayannur Forest Research Institute, Bayannur 015000, Inner Mongolia, China
  • Received:2009-10-07 Revised:2009-12-09 Online:2010-07-20 Published:2010-07-20

摘要: 选取科尔沁沙地3种代表性灌木(差不嘎蒿、黄柳、小叶锦鸡儿)作为研究对象,采用网袋法对其凋落物进行研究,每月取样测试,结合试验期间当地气象资料,对凋落物在不同类型沙丘、不同深度的分解率进行相关分析。结果表明,生长季节内,放置在地表的凋落物在固定沙丘上的分解率大于其在流动沙丘上的分解率,而在冬春季节却相反;凋落物在地下10 cm深处的分解普遍快于地表;经过一年的分解,差不嘎蒿的分解率大于另两种植物,以固定沙丘地表放置为例,其最终分解率为53.6%,大于小叶锦鸡儿的28.5%及黄柳的21%;降水对凋落物的分解影响较地温更大。

关键词: 凋落物, 分解, 灌木, 气象因子, 科尔沁沙地

Abstract: Litter decomposition rates of three shrub species (Artemisia halodendron, Salix gordejevii, and Caragana microphylla) in Horqin Sandy Land were investigated. Collected litter was put in nylon bag and then was put on different kinds of sand dunes or was buried deep down in 10 cm, with sampling and weighing it every month. The results showed the decomposition rate of litter put on the fixed sand dunes was higher than the decomposition rate of litter put on the mobile sand dune from May to August, and the situation was just the reverse in winter. The decomposition rate of litter buried in the sand dunes was higher than the decomposition rate of litter put on the sand dune. Litter decomposition rates of Artemisia halodendron was higher than that of the other two shrub species, for example, decomposition rates of litter of Artemisia halodendron put on the fixed sand dunes was 53.6% after one year, while that of Caragana microphylla and Salix gordejevii was 28.5% and 21% respectively. Impact of precipitation on litter decomposition rates was more significant than that of ground temperature.

Key words: litter, decomposition, shrub, meteorological factors, Horqin Sandy Land

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