CAJ | 학술논문

利用Li-8100开路式土壤碳通量测量系统,于2010年5月、7月、10月对黄河三角洲芦苇群落土壤呼吸及其对影响土壤呼吸的净辐射、净光合速率、土壤温度、土壤含水量进行观测.结果表明：黄河三角洲芦苇群落土壤呼吸速率日动态变化明显呈单峰形特征,12∶00左右出现日土壤呼吸速率峰值,生长旺盛期7月土壤呼吸速率高于返青期5月和生长末期10月,净辐射、净光合速率与土壤呼吸速率之间有显著线性关系与指数关系（P〈0.01）,他们可能是土壤呼吸日动态变化主要影响因子,而10cm土壤温度与10cm土壤含水量对土壤呼吸速率日动态变化影响不显著（P〉0.05）.
이용Li-8100개로식토양탄통량측량계통,우2010년5월、7월、10월대황하삼각주호위군락토양호흡급기대영향토양호흡적정복사、정광합속솔、토양온도、토양함수량진행관측.결과표명：황하삼각주호위군락토양호흡속솔일동태변화명현정단봉형특정,12∶00좌우출현일토양호흡속솔봉치,생장왕성기7월토양호흡속솔고우반청기5월화생장말기10월,정복사、정광합속솔여토양호흡속솔지간유현저선성관계여지수관계（P〈0.01）,타문가능시토양호흡일동태변화주요영향인자,이10cm토양온도여10cm토양함수량대토양호흡속솔일동태변화영향불현저（P〉0.05）.
Soil respiration dynamics of Phragmites australis in the Yellow River Delta was observed by using LI-8100 automated soil CO2 flux system in May, July, October 2010. At the same time, environmental factors including net radiation,leaf net photosynthetic rate, soil temperature and soil water were also recorded. The results showed that diurnal variation of soil respiration was obviously characterized by a single peak pattern, and the maximum soil respiration of day came at about twelve o＇clock. Soil respiration was significantly correlate with net radiate and leaf net photosynthetic rate （P 〈 0. 01 ）. These indicated that daily variation of soil respira- tion in the study area was influenced mainly by the two factors. There were no significant correlation between soil respiration and soil temperature at ten centimeters depth, soil water content at ten centimeters in this area （P 〉0. 05）.