摘要
在极端干旱区(敦煌)以泡泡刺(Nitraria sphaerocarpa)群落为研究对象,在7月和9月测定分析了不同间隔时间降雨对泡泡刺灌丛和裸地土壤呼吸速率的影响。结果表明:与对照相比,不同间隔时间的降雨没有引起土壤有机质和土壤氮含量的增加,但导致裸地和灌丛土壤pH轻微升高;与对照相比,在7月份,不同间隔时间的降雨显著增加了裸地和灌丛的土壤含水量和土壤呼吸速率(P<0.01),而在9月份,虽然不同间隔时间的降雨使土壤含水量显著增加(P<0.01),但土壤呼吸速率并没有显著提高(P>0.05);在裸地和灌丛下,降雨间隔时间延长没有明显提高或降低土壤呼吸速率变化(P>0.05)。
In order to analyse the effect of different intervals of rainfall on soil respiration rate of Nitraria sphaerocarpa community,we measured soil respiration rate in bare and vegetated area in hyperarid area（Dunhuang） in July and September.The results showed that： By contrast,rainfall in different interval could not increased soil organic matter and soil nitrogen content but improved the soil pH slightly in both bare and vegetated soils.Rainfall in different interval could significantly increased bare and vegetated soil water contant and soil respiration rate in July（P0.01）.Rainfall in different interval could significantly increased soil water contant but could not significantly increased soil respiration rate in September（P0.05）.Extended interval times of rainfall did not significantly increase or decrease the soil respiration rate in bare and vegetated soils.
出处
《内蒙古农业大学学报（自然科学版）》
CAS
北大核心
2013年第2期69-76,共8页
Journal of Inner Mongolia Agricultural University(Natural Science Edition)
基金
内蒙古人才基金(111015)
关键词
土壤呼吸
降雨
间隔时间
Soil respiration
rainfall
rainfall in different interval
