CAJ | 학술논문

采用碱液吸收法对苏北泥质海岸15年生水杉(Metasequoia glyptostroboides Hu & Cheng)林地的土壤异养呼吸进行了测定.结果表明:水杉林地2-10月土壤异养呼吸速率CO_2变化范围为4.72～12.87 g/(m～2·d),最大值出现在7月,最小值出现在2月.土壤温度是影响土壤异养呼吸的主要因子,温度变化能够解释土壤异养呼吸季节变化的62.1 %～70.9 %,土壤含水量与土壤异养呼吸的关系不显著.利用林内气温及地表下2、5、10 cm处的土壤温度得到水杉林地的Q_(10)值分别为1.00、1.59、1.55、1.54.
채용감액흡수법대소북니질해안15년생수삼(Metasequoia glyptostroboides Hu & Cheng)임지적토양이양호흡진행료측정.결과표명:수삼임지2-10월토양이양호흡속솔CO_2변화범위위4.72～12.87 g/(m～2·d),최대치출현재7월,최소치출현재2월.토양온도시영향토양이양호흡적주요인자,온도변화능구해석토양이양호흡계절변화적62.1 %～70.9 %,토양함수량여토양이양호흡적관계불현저.이용림내기온급지표하2、5、10 cm처적토양온도득도수삼임지적Q_(10)치분별위1.00、1.59、1.55、1.54.
Soil heterotrophic respiration is an important part of forest carbon cycle; therefore, studies on this topic will help to explore the causes for global climatic change. Soil heterotrophic respiration of 15-year old metasequoia plantation was investigated in silting coastal area of northern Jiangsu province and soil CO_2 efflux was measured in situ with the static alkali absorption method. Results showed that soil heterotrophic respiration rate of the metasequoia plantation between February and October varied from 4.72 to 12.87 g/(m~2·d), the largest soil respiration rate occurred in July and the smallest appeared in February. Temperature was the limiting factor to soil respiration. The Q_(10) values were calculated with forest air temperature and the soil temperature of 2, 5, 10 cm soil depth were 1.00, 1.59, 1.55 and 1.54, respectively. These results are important to future studies on soil respiration of silting coastal plantations and provide basic data for the further research in carbon circle.