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生态学杂志 ›› 2010, Vol. 29 ›› Issue (08): 1634-1638.

• 研究报告 • 上一篇    下一篇

大气CO2浓度升高对稻田土壤溶液中阴离子浓度的影响

王小治1,2**,尹微琴1,孙 伟1,封 克1,朱建国2   

  1. 1扬州大学环境科学与工程学院,扬州 225127;2土壤与农业可持续发展国家重点实验室,南京 210008
  • 出版日期:2010-08-06 发布日期:2010-08-06

Effects of elevated atmospheric CO2 on anion concentrations in paddy field soil solution.

WANG Xiao-zhi1,2,YIN Wei-qin1, SUN Wei1,FENG Ke1,ZHU Jian-guo2   

  • Online:2010-08-06 Published:2010-08-06

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5 cm处相比,其在15 cm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。

关键词: 野生大豆, 耐盐性, 离子分配, 选择性运输

Abstract: 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-, CO32-, HCO3-, SO42-, NO3-, and dissolved inorganic phosphorus (DIP) in soil solution at different growth stages of rice. Under effects of elevated atmospheric CO2, the SO42- 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 CO32-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.  

Key words: Wild soybean, Salt tolerance, Ionic distribution, Selective transportation