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    赵冰清, 王云琦, 王彬, 王玉杰, 张会兰. 环境因子对重庆缙云山林地土壤呼吸动态特征的作用[J]. 北京林业大学学报, 2014, 36(3): 83-89. DOI: 10.13332/j.cnki.jbfu.2014.03.012
    引用本文: 赵冰清, 王云琦, 王彬, 王玉杰, 张会兰. 环境因子对重庆缙云山林地土壤呼吸动态特征的作用[J]. 北京林业大学学报, 2014, 36(3): 83-89. DOI: 10.13332/j.cnki.jbfu.2014.03.012
    ZHAO Bing-qing, WANG Yun-qi, WANG Bin, WANG Yu-jie, ZHANG Hui-lan. Role of environmental factors on forest soil respiration characteristics in Jinyun Mountain of Chongqing, southwestern China[J]. Journal of Beijing Forestry University, 2014, 36(3): 83-89. DOI: 10.13332/j.cnki.jbfu.2014.03.012
    Citation: ZHAO Bing-qing, WANG Yun-qi, WANG Bin, WANG Yu-jie, ZHANG Hui-lan. Role of environmental factors on forest soil respiration characteristics in Jinyun Mountain of Chongqing, southwestern China[J]. Journal of Beijing Forestry University, 2014, 36(3): 83-89. DOI: 10.13332/j.cnki.jbfu.2014.03.012

    环境因子对重庆缙云山林地土壤呼吸动态特征的作用

    Role of environmental factors on forest soil respiration characteristics in Jinyun Mountain of Chongqing, southwestern China

    • 摘要: 以重庆缙云山区毛竹林和阔叶林为研究对象,研究土壤呼吸日变化、季节变化和年变化特征与环境因子的关 系。用LI-8100 对重庆缙云山区毛竹林和阔叶林的土壤呼吸速率进行测定。结果表明:1)2 种林分的土壤呼吸速 率日变化较为平缓。毛竹林和阔叶林的土壤呼吸速率最大值分别出现在16:0018:00 和10:0020:00,最小值 分别出现在06:00 和04:0010:00。2 种林分的土壤呼吸月变化均表现为生长季明显高于非生长季。毛竹林的土 壤呼吸季节变化明显,从3 月开始土壤呼吸速率不断升高,7 或8 月达到最大值,为5.00 ~ 6.18 g/(m2d),随后开 始下降;阔叶林的土壤呼吸速率变化相对平缓,2 种林分均为单峰曲线。阔叶林的土壤呼吸年变化幅度明显大于毛 竹林。2)单因子分析表明,毛竹林的土壤呼吸速率与土壤温度和大气温度呈显著正相关,阔叶林的土壤呼吸速率 与土壤温度和土壤含水量呈显著正相关,与大气温度呈显著负相关。阔叶林的土壤呼吸速率与气象因子比毛竹林 保持更高的一致性。3)通径分析显示,土壤温度和大气温度是影响毛竹林土壤呼吸速率的主要因子。土壤温度和 土壤含水量是影响阔叶林土壤呼吸速率的主要因子。

       

      Abstract: Taking Phyllostachys pubescens forest and broadleaved forest in Jinyun Mountain of Chongqing as object, the characteristics of daily, seasonal and annual variations of soil respiration and interactions between soil respiration and environmental factors were studied. Soil respiration rate in P. pubescens forest and broadleaved forest in Jinyun Mountain was measured by LI-8100. The results showed that: 1) daily variations in soil respiration rates of two stands slightly varied. The highest soil respiration rate of P. pubescens and broadleaved forest appeared in 16:00 to 18:00 and 10:00 to 20:00, respectively, while the minimum occurred at 06:00 and in 04:00 to 10:00, respectively. Monthly variations of soil respiration showed that growing season was significantly higher than non-growing season in the two stands. The seasonal variations of soil respiration were obvious in P. pubescens forest. The soil respiration rate was rising from the beginning of March, peaking at 5.00-6.18 g/(m2day) in July or August. And then it declined. However, the variations of soil respiration rate were relatively flat in broadleaved forest. In the two stands, all the variations of soil respiration rate were single-peak curve. Moreover, the annual variations of soil respiration in broadleaved forest were significantly greater than P. pubescens forest. 2) Single-factor analysis showed that soil respiration rate of P. pubescens forest was significantly positively correlated with soil temperature and atmospheric temperature. The soil respiration in broadleaved forest was significantly positively correlated with soil temperature and soil moisture content, while was significantly negatively correlated with atmospheric temperature. Soil respiration in broadleaved forest was greater consistent with meteorological factors than in P. pubescens forest. 3) Path analysis indicated that soil temperature and atmospheric temperature were two main factors affecting soil respiration in P. pubescens forest. In addition, soil temperature and soil moisture content were main factors affecting soil respiration in broadleaved forest.

       

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