Effects of rain supplementation on the temperature sensitivity of soil respiration in Nitraria sphaerocarpa community in a hyperarid area of Dunhuang, China
In order to analyze the effects of rain supplementation on soil respiration rate of Nitraria sphaerocarpa community,we measured the temperature sensitivity of respiration (Q10) from bare and vegetated soils in a hyperarid area (Dunhuang) during the growing season.The results showed that Q10 was enhanced significantly with the increase in rain supplementation in the bare soils,but there was no obvious influence on Q10 of the vegetated soils.The rain supplementation (16 mm,200％ of the control) significantly increased the Q10 of the bare soils by 28％ (P＜0.05).There was a significant positive correlation between Q10 and soil water content during the growing season (P＜0.001),and the sensitivity of Q10 to soil water content was higher in the bare soils (1.94) than in the vegetated soils (1.57).
soil respirationrain supplementationtemperature sensitivity of soil respiration (Q10)
国家科技期刊平台
NSTL
万方数据
维普
