摘要
利用中国稻/麦轮作FACE(Free-Air Carbon Dioxide Enrichment)试验平台,研究了大气CO2浓度升高对稻季各生育期耕层土壤溶液中Cl-、CO32-、HCO3-、SO42-、NO3-和溶解无机磷(DIP)等阴离子浓度的影响,探讨了稻田生态系统土壤元素地球化学循环对大气CO2浓度升高的响应。结果表明:大气CO2浓度升高降低了土壤溶液SO42-浓度,提高了HCO3-浓度,与5cm处相比,其在15cm处的影响程度更大;大气CO2浓度升高有增加土壤溶液NO3-和溶解无机磷(DIP)的趋势;对CO32-和Cl-未表现出明显的规律性影响。文章还分析了大气CO2浓度升高对土壤溶液阴离子浓度产生影响的可能机理。
Aimed to approach the responses of soil element geochemical cycling in paddy field ecosystem to elevated atmospheric CO2, a rice/wheat FACE （Free-Air Carbon Dioxide Enrichment） platform was utilized to study the effects of elevated atmospheric CO2 on the concentrations of Cl^-, CO3^2-, HCO3^-, SO4^2-, NO3^-, and dissolved inorganic phosphorus （DIP） in soil solution at different growth stages of rice. Under effects of elevated atmospheric CO2, the SO4^2-concentration in soil solution decreased while the HCO3^-concentration was in adverse, and the effects were more obvious at the soil depth 15 cm than at 5 cm. In the meantime, the NO3^-and DIP concentrations in soil solution had a decreasing trend, while the CO3^2-and Cl^-concentrations had no obvious variation pattern. The affecting mechanisms of elevated atmospheric CO2 on the anion concentration in soil solution were also analyzed.
出处
《生态学杂志》
CAS
CSCD
北大核心
2010年第8期1634-1638,共5页
Chinese Journal of Ecology
基金
扬州大学科技基金项目(2008CXJ015
2009CXJ016)
江苏省"青蓝工程"和国家自然科学基金重大国际合作资助项目(40120140817)
