[水稻生长季大气CO₂浓度升高对稻田土壤氮含量的影响]

[Effects of elevated atmospheric CO2 on paddy soil nitrogen content during rice season].

作者信息

Wang Xiao-Zhi, Zhang Hai-Jin, Sun Wei, Feng Ke, Zhu Jian-Guo

机构信息

College of Environment Science and Engineering, Yangzhou University, Yangzhou 225127, Jiangsu, China.

出版信息

Ying Yong Sheng Tai Xue Bao. 2010 Aug;21(8):2161-5.

PMID:21043130

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.

摘要

以中国水稻/小麦自由空气二氧化碳浓度增高（FACE）为平台，本文研究了大气CO₂浓度升高对水稻季稻田土壤不同深度铵态氮（NH₄⁺-N）和硝态氮（NO₃⁻-N）含量的影响。在大气CO₂浓度升高条件下，耕层土壤铵态氮含量在生育前期增加，生育后期降低；与对照相比，5、15、30、60和90 cm土层土壤硝态氮含量分别增加了46.5%、36.8%、23.3%、103.7%和42.7%，其中60 cm土层达到极显著水平（P < 0.０1），90 cm土层达到显著水平（P < 0.０5）。