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[1]马涛,周金星.滩地人工杨树林土壤呼吸变化规律与环境因子的关系研究[J].水土保持研究,2011,18(06):31-36,41.
　MA Tao,ZHOU Jin-xing.Studies on Soil Respiration Change and Its Relation with Environmental Factors in Poplar Plantation on Beach Land[J].Research of Soil and Water Conservation,2011,18(06):31-36,41.

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滩地人工杨树林土壤呼吸变化规律与环境因子的关系研究

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 18 期数: 2011年06期页码: 31-36,41 栏目: 出版日期: 2011-12-20

Title:: Studies on Soil Respiration Change and Its Relation with Environmental Factors in Poplar Plantation on Beach Land

作者:: 马涛¹, 周金星²; 1. 甘肃省水土保持科学研究所, 兰州 730020;
2. 中国林业科学研究院, 荒漠化研究所, 北京 100091

Author(s):: MA Tao¹, ZHOU Jin-xing²; 1. Gansu Institute of Soil and Water Conservation, Lanzhou 730020, China;
2. Institute of Desertification Studies, Chinese Academy of Forestry, Beijing 100091, China

关键词:: 人工杨树林; 土壤呼吸; 环境因子; Q₁₀值; 滩地

Keywords:: poplar plantation; soil respiration; environmental factors; Q₁₀ value; beach land

分类号:: S715.71;S154.4

摘要:: 为揭示滩地人工杨树林土壤呼吸特征及其与环境因子的关系，采用红外气体分析(IRGA)法对滩地人工杨树林土壤CO₂释放量进行测定，分析温度、水分、林下植被结构等因素对林地土壤呼吸日变化动态的影响。结果表明：滩地人工杨树林生态系统土壤呼吸日动态变化呈单峰曲线，在11：00-13：00达到最大值。土壤呼吸速率大小的排列顺序为：2006年6月>2005年10月>2006年3月>2006年10月。日均土壤呼吸速率为2.29±0.75 μmol/(m²·s)(P＜0.05，n=13)，变异系数为54.40%。土壤呼吸对地表温度的敏感性大于对地下5 cm处温度的敏感性。土壤呼吸温度敏感性指标Q₁₀值为1.28±0.79(P＜0.05，n=13)，低于不包括湿地在内的全球尺度水平。土壤水分与土壤呼吸相关性差，不是滩地林地土壤CO₂释放量的限制因子。林下植被亦是影响土壤呼吸速率的一个重要因素。

Abstract:: In order to reveal the soil respiration change and its relation with environmental factors, soil CO₂ emission rates in artificial poplar plantation on Beach Land were investigated by using Infra Red Gas Analysis(IRGA) technique, and the soil respiration changes in relation to environmental factors such as temperature, soil water content and vegetation structure underforest were analyzed. The results showed that the diurnal dynamics of soil respiration presented a single peak curve with the maximum occurring around 11:00-13:00. The order of soil CO₂ emission rates is Jun-2006>Oct-2005>Mar-2006>Oct-2006. The mean value of efflux is 2.29±0.75 μmol/(m²·s)(P＜0.05, n=13) and a coefficient of variation is 54.40%. The sensitivity of the soil respiration to the temperature above ground is superior to the soil temperature at 5 cm. The Temperature susceptibility indexes Q₁₀ value is 1.28±0.79(P＜0.05, n=13), which is less than the global level except for beach land. The relationship between soil moisture and soil respiration is not good, so the soil moisture is not the limitational factor to the efflux of CO₂. The vegetation structure is also the one influence factor controlling soil respiration.

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备注/Memo

收稿日期:2011-4-10;改回日期:2011-6-17。
基金项目:“十一五”国家林业科技支撑项目(2006BAD03A15)
作者简介:马涛(1983- )，男，甘肃天水人，硕士，工程师，主要从事流域治理与技术服务研究。E-mail：mataosbsgsu@126.com

更新日期/Last Update: 1900-01-01