| (土娄)土剖面CO_2释放通量的变异特征 |
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| 引用本文： | 夏发生,王益权,刘军,徐海.(土娄)土剖面CO_2释放通量的变异特征[J].干旱地区农业研究,2010,28(1):117-121. |
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| 作者姓名： | 夏发生 王益权 刘军 徐海 |
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| 作者单位： | 西北农林科技大学资源环境学院,陕西,杨凌,712100 |
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| 摘 要： | 采用碱液吸收法,对(土娄)土剖面CO2通量进行连续1年的定位观测研究。结果表明:(土娄)土剖面CO2通量具有明显的、较为复杂的季节变化规律,8月下旬最高,冬季最低;一般情况下观测期间耕作区(土娄)土剖面CO2通量呈现表层低-中部高-底层低的分布特征;休闲区(土娄)土剖面CO2通量的季节变化和剖面变化与耕作区相类似,但是在土剖面CO2通量的变化剧烈程度和复杂性方面,耕作区表现的更为明显。土壤温度是影响土剖面CO2通量的主要因素,二者间存在极显著的指数函数相关关系(P0.01);土壤含水量与土剖面CO2通量之间也有着一定的相关关系,但是与土壤温度相比其属于次要地位。土壤CO2释放通量与土壤含水量之间存在一个最适土壤含水量,随着剖面深度的增加,最适土壤含水量逐渐增大。
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| 关 键 词： | （土娄）土 剖面CO2通量 土壤温度 土壤含水量 |
Dynamic characteristics of CO2 release flux in Lou soil |
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| XIA Fasheng,WANG Yiquan,LIU Jun,XU Hai.Dynamic characteristics of CO2 release flux in Lou soil[J].Agricultural Research in the Arid Areas,2010,28(1):117-121. |
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| Authors: | XIA Fasheng WANG Yiquan LIU Jun XU Hai |
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| Institution: | College of Resources and Envrionment;Northwest A & F University;Yangling;Shaanxi 712100;China |
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| Abstract: | Soil CO2 release flux was measured by Ca(OH)2 solution method in Lou soil profile with long-term observation and survey.The results obtained in one year showed that the seasonal dynamics of soil CO2 release flux in Lou soil profile was obvious and relatively complex,and its maximum value appeared in the last ten days of August,while the lowest in winter.The profile dynamics of soil CO2 release flux in Lou soil was low to high to low from top to deeper.The seasonal and profile dynamics of soil CO2 release fl... |
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| Keywords: | Lou soil profile CO2 release flux soil temperature soil moisture |
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