| 夏发生,王益权,刘军,徐海.(土娄)土剖面CO2释放通量的变异特征[J].干旱地区农业研究,2010,28(1):117~121 |
| (土娄)土剖面CO2释放通量的变异特征 |
| Dynamic characteristics of CO2 release flux in Lou soil |
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| DOI：10.7606/j.issn.1000-7601.2010.01.22 |
| 中文关键词: (土娄)土 剖面CO2通量 土壤温度 土壤含水量 |
| 英文关键词:Lou soil profile CO2 release flux soil temperature soil moisture |
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| 中文摘要: |
| 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(土娄)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(土娄)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（P<0.01）；土壤含水量与(土娄)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。 |
| 英文摘要: |
| 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 C
O2 release flux in Lou soil was low to high to low from top to deeper. The seasonal and profile dynamics of soil CO2 release flux in fallow field was similar to that in cultivated field, but dynamic extent and complex of that in cultivated field was more significant. Soil CO2 release flux was significantly correlated with soil temperature, and could be described by power function(P<0.01). Soil CO2 release flux was correlated with soil moisture, but not so much as with soil temperature. There was most suitable soil moisture in soil CO2 release flux and soil moisture, and it was more and more while the profile got deeper and deeper. |
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