农业环境科学学报2017，Vol.36Issue(4)：793-798,6.DOI:10.11654/jaes.2016-1403
UV-B辐射促进红壤水稻土中碳氮转化
UV-B radiation facilitates the transformation of carbon and nitrogen in red paddy soils
摘要
Abstract
Two red paddy soils developed out of the same parental material with contrasting content of soil organic matter were selected to study the effects of UV-B radiation on soil carbon and nitrogen transformation. Results showed that soil total organic carbon(TOC)content decreased while dissolved organic carbon(DOC)content increased with increasing UV-B radiation level. UV-B radiation facilitated soil organic carbon decomposition and increased soil nitrate. Exposed to the strongest UV-B radiation (2.83 W·m-2)for 96 h caused that TOC decreased by 9.89%and 10.16%, DOC increased by 39.24%and 50.50%, and NO-3-N increased by 74.48%and 81.87% in soils with low and high content of organic matter, respectively. Therefore, in order to protect the carbon pool and reduce nitrogen lose in the agricultural practice, the soil surface should avoid exposing to UV-B radiation as much as possible.关键词
UV-B辐射/稻田土/碳、氮转化/总有机碳(TOC)/可溶性有机碳(DOC)Key words
UV-B radiation/paddy soils/carbon/nitrogen transformation/total organic carbon(TOC)/dissolved organic carbon(DOC)分类
资源环境引用本文复制引用
徐鹏,王秋敏,蒋梦蝶,林杉,邬磊,赵劲松,胡荣桂..UV-B辐射促进红壤水稻土中碳氮转化[J].农业环境科学学报,2017,36(4):793-798,6.基金项目
中央高校基本科研业务费专项基金(2662016PY098) The Fundamental Research Funds for the Central Universities(2662016PY098) （2662016PY098）
