CAJ | 학술논문

采用碱液吸收法,对(土娄)土剖面CO_2通量进行连续1年的定位观测研究.结果表明: (土娄)土剖面CO_2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CO_2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CO_2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CO_2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CO_2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CO_2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CO_2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.
채용감액흡수법,대(토루)토부면CO_2통량진행련속1년적정위관측연구.결과표명: (토루)토부면CO_2통량구유명현적、교위복잡적계절변화규률,8월하순최고,동계최저;일반정황하관측기간경작구 (토루)토부면CO_2통량정현표층저-중부고-저층저적분포특정;휴한구 (토루)토부면CO_2통량적계절변화화부면변화여경작구상유사,단시재 (토루)토부면CO_2통량적변화극렬정도화복잡성방면,경작구표현적경위명현.토양온도시영향 (토루)토부면CO_2통량적주요인소,이자간존재겁현저적지수함수상관관계(P<0.01);토양함수량여 (토루)토부면CO_2통량지간야유착일정적상관관계,단시여토양온도상비기속우차요지위.토양CO_2석방통량여토양함수량지간존재일개최괄토양함수량,수착부면심도적증가,최괄토양함수량축점증대.
Soil CO_2 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 CO_2 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 CO_2 release flux in Lou soil was low to high to low from top to deeper. The seasonal and profile dynamics of soil CO_2 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 CO_2 release flux was significantly correlated with soil temperature, and could be described by power function(P<0.01). Soil CO_2 release flux was correlated with soil moisture, but not so much as with soil temperature. There was most suitable soil moisture in soil CO_2 release flux and soil moisture, and it was more and more while the profile got deeper and deeper.