CAJ | 학술논문

对生长季内阔叶混交林和油松林的土壤呼吸速率进行研究，探讨冀北辽河源地区土壤呼吸与地下5 cm土壤湿度、地下5、10、15 cm土壤温度（ T5、T10、T15）、近地面大气温度、土壤微生物量碳、土壤理化性质的关系。结果表明：阔叶混交林和油松林的土壤呼吸速率的季节变化呈明显的单峰曲线，平均值分别为4．28、3．69μmol· m－2· s－1，与土壤温度的季节变化曲线大致相同，而滞后于大气温度。阔叶混交林、油松林的各温度与土壤呼吸均呈显著的正相关关系（ P＜0．01）；而土壤湿度和各土层的阔叶混交林与土壤呼吸的相关性不显著，但群落间土壤有机碳、w（ C）／w（ N）、全氮、全磷、土壤微生物量碳均达到显著差异。综合分析，地下5 cm土壤温度为该地区森林土壤呼吸速率季节变化的主要影响因子；而土壤微生物量碳、凋落物种类及土壤理化性质的综合影响可能是引起两种群落的土壤呼吸速率差异的原因。
대생장계내활협혼교림화유송림적토양호흡속솔진행연구，탐토기북료하원지구토양호흡여지하5 cm토양습도、지하5、10、15 cm토양온도（ T5、T10、T15）、근지면대기온도、토양미생물량탄、토양이화성질적관계。결과표명：활협혼교림화유송림적토양호흡속솔적계절변화정명현적단봉곡선，평균치분별위4．28、3．69μmol· m－2· s－1，여토양온도적계절변화곡선대치상동，이체후우대기온도。활협혼교림、유송림적각온도여토양호흡균정현저적정상관관계（ P＜0．01）；이토양습도화각토층적활협혼교림여토양호흡적상관성불현저，단군락간토양유궤탄、w（ C）／w（ N）、전담、전린、토양미생물량탄균체도현저차이。종합분석，지하5 cm토양온도위해지구삼림토양호흡속솔계절변화적주요영향인자；이토양미생물량탄、조락물충류급토양이화성질적종합영향가능시인기량충군락적토양호흡속솔차이적원인。
We studied the soil respiration of mixed broad-leaved forest ( MBF) and Pinus tabulaeformis forest ( YF) within the growing season, and discussed the relationships between soil respiration rate and soil moisture at 5 cm depth ( W) , soil temperature at 5 cm, 10 cm, 15 cm depth ( T5 , T10 , T15 ) , near-surface air temperature ( Ta ) , soil microbial biomass car-bon ( MBC ) , soil physical and chemical properties in Liaoheyuan Nature Reserve of Northern Hebei.The seasonal varia-tions of YF and MBF’s soil respiration rate represented a single peak curve with the means of 4.28 and 3.69μmol· m-2· s-1 , respectively.It was the same with the seasonal variation of soil temperature curve, but laged behind atmospheric tem-perature.T5, T10, T15, Ta and corresponding soil respiration of MBF, YF showed a significant positive correlation (P<0.01), and the relationship between W, each layer of MBC and soil respiration were not significant.But significance between com-munities of soil organic carbon, w(C)/w(N), total nitrogen, total phosphorus, soil microbial biomass carbon reached sig-nificant levels.By comprehensive analysis, T5 was the main factor leading forest soil respiration seasonal variations in this area, and the combined effects of MBC, litter type and soil physical and chemical properties in all probability caused the differences between the soil respirations of two communities.