农业资源与环境学报2017，Vol.34Issue(1)：54-58,5.DOI:10.13254/j.jare.2016.0109
降雨对干旱半干旱区湿地和农田土壤CO2短期释放的影响
Response of Soil CO2 Short-term Emissions to Simulated Rainfalls in Arid and Semi-arid Area
摘要
Abstract
Precipitation is one of the key factors that influence the soil respiration. A simulated precipitation experiment focused on response of wetland and farmland soil CO2 emissions to simulated rainfalls using a LI-8100 automated soil CO2 flux system(LI-COR, Lincoln, Nebras-ka, USA)was carried out. The dynamics of diurnal soil respiration rate and the correlations between soil respiration rate and soil temperature were also evaluated in this paper. Results showed that precipitation could stimulate wetland soil CO2 emission rate(P<0.01),but this phe-nomenon could not be found in farmland soil. Under the same soil water content, different precipitation groups of CO2 emissions in wetland soil were greater than that in farmland. The wetland soil cumulative CO2 emissions was greatest at 10 mm precipitation group, followed by 20 mm precipitation group, and control group had the smallest values. With the increase of rainfall,the wetland soil that had high organic carbon released high CO2 in short-term, and soil of low organic carbon(arid zone of northwest arid soil)had insignificant effect on soil carbon loss. Farmland soil CO2 emission rate was significantly correlated with soil temperature(0 cm, 5 cm)under 10 mm precipitation group(P<0.01). The change of the farmland soil cumulative CO2 was in accordance with the change of wetland soil. This finding indicated that precipitation was the important factor influencing the response of soil CO2 emissions in arid and semi-arid area.关键词
降雨/CO2排放/湿地/农田Key words
precipitation/CO2 emission/wetland/farmland分类
资源环境引用本文复制引用
朱新萍,贾宏涛,周建勤,蒋平安,克热木阿依,张雨佳,张岚..降雨对干旱半干旱区湿地和农田土壤CO2短期释放的影响[J].农业资源与环境学报,2017,34(1):54-58,5.基金项目
新疆自然科学基金 （）
