摘要
在极端干旱区(敦煌)以泡泡刺群落为研究对象,测定了生长季内增雨对泡泡刺群落灌丛和裸地土壤呼吸温度敏感性(Q_(10))的影响。结果表明:增雨明显增加了裸地的Q_(10),但未能显著改变灌丛的Q_(10)与对照相比,增雨16 mm使裸地Q_(10)显著增加28%,达1.83±0.30;在整个生长季,裸地和灌丛的Q_(10)季节波动与土壤含水量的变化存在极显著相关关系,且裸地的Q_(10)对土壤水分的敏感性(1.94)高于灌丛(1.57)。
In order to analyze the effects of rain supplementation on soil respiration rate of Nitraria sphaerocarpa community,we measured the temperature sensitivity of respiration（ Q_（10）） from bare and vegetated soils in a hyperarid area（ Dunhuang） during the growing season. The results showed that Q_（10） was enhanced significantly with the increase in rain supplementation in the bare soils,but there was no obvious influence on Q_（10） of the vegetated soils. The rain supplementation（ 16 mm,200% of the control） significantly increased the Q_（10） of the bare soils by 28%（ P〈0.05）. There was a significant positive correlation between Q_（10） 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）.
出处
《生态学杂志》
CAS
CSCD
北大核心
2016年第3期584-590,共7页
Chinese Journal of Ecology
基金
"十二五"科技支撑项目(2012BAD16B01)
林业公益性行业科研专项经费(201104077)
林业科学技术研究项目(CAF201202)资助
关键词
土壤呼吸
人工增雨
土壤呼吸的温度敏感性
soil respiration
rain supplementation
temperature sensitivity of soil respiration（Q10）
