大气CO2浓度升高对稻田土壤氮素的影响 |
| |
引用本文: | 王小治,张海进,孙 伟,封 克,朱建国.大气CO2浓度升高对稻田土壤氮素的影响[J].生态学杂志,2010,21(8):2161-2165. |
| |
作者姓名: | 王小治 张海进 孙 伟 封 克 朱建国 |
| |
作者单位: | 1.扬州大学环境科学与工程学院 江苏扬州 225127;2.土壤与农业可持续发展国家重点实验室,南京 210008 |
| |
摘 要: | 利用中国稻/麦轮作FACE(Free-Air Carbon=Dioxide Enrichment)试验平台,研究大气CO2浓度升高200 μmol·mol-1(周围大气中CO2浓度约370 μmol·mol-1)对稻季各生育期不同深度土壤溶液NH4+-N和NO3--N浓度的影响.结果表明:高CO2浓度条件下耕层土壤溶液NH4+-N浓度在水稻生育前期有所增加,但在生育后期明显下降;大气CO2浓度升高增加了稻季5、15、30、60和90 cm处土壤溶液NO3--N浓度,分别比对照平均提高了46.5%、36.8%、23.3%、103.7%和42.7%,在60和90 cm处差异分别达到统计上的极显著和显著水平.
|
关 键 词: | CO2浓度升高 稻季 稻田土壤 NH4+-N NO3--N |
Effects of elevated atmospheric CO2 on paddy soil nitrogen content during rice season. |
| |
Institution: | 1.College of Environment Science and Engineering, Yangzhou University, Yangzhou 225127, Jiangsu, China|;2.State Key Laboratory of Soil and Sustainable Agriculture, Nanjing 210008, China |
| |
Abstract: | Taking the China rice/wheat FACE (Free-Air Carbon Dioxide Enrichment) as a platform, this paper studied the effects of elevated CO2 on the NH4+-N and NO3--N contents at different depths of paddy soil in rice season. Under elevated CO2, the NH4+-N content in plough layer increased at early growth stage but decreased at late growth stage, and the soil NO3--N content at the depths 5, 15, 30, 60, and 90 cm increased by 46.5%, 36.8%, 23.3%, 103.7%, and 42.7%, respectively, with a significant increase occurred at the depths 60 cm (P<0.01) and 90 cm (P<0.05), compared with the control. |
| |
Keywords: | elevated atmospheric CO2 rice season paddy soilpaddy soil NH4+-N NO3--N |
|
| 点击此处可从《生态学杂志》浏览原始摘要信息 |
| 点击此处可从《生态学杂志》下载免费的PDF全文 |
|