title: [Effects of elevated ultraviolet-B radiation on the chemical composition of wheat straw and the N2O emission from soil amended with the straw].
abstract: An outdoor experiment was carried out to investigate the effects of elevated ultraviolet-B radiation on the chemical composition of wheat straw, and an indoor incubation test was conducted to study the effects of the amendment of the straw on soil N2O emission. Outdoor experiment showed that the enhanced UV-B decreased the aboveground biomass of wheat, increased the lignin and total N contents of wheat straw by 94.2% and 12.3%, respectively, and decreased the C/N ratio of the straw. Incubation test showed that comparing with the amendment of conventional wheat straw, the amendment of wheat straw received enhanced UV-B radiation during plant growth increased soil N2O emission under the dry-land and flooded conditions significantly. When nitrate was applied, the soil N2O emission in the treatment with straw received enhanced UV-B radiation during plant growth was 3.2 times higher than that with the conventional straw under dry-land condition, but did not differ significantly under flooded condition. The amendment of wheat straw which received UV-B radiation during plant growth had no significant effects on soil respiration.
authors.affiliation: College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China. lilacjjy@njau.edu.cn
authors.forename: Jing-yan
authors.initials: JY
authors.lastname: Jiang
authors.forename: Zheng-hua
authors.initials: ZH
authors.lastname: Hu
authors.forename: Chuan-po
authors.initials: CP
authors.lastname: Niu
mesh_terms: D009609:Nitrous Oxide / Q000032:analysis*; D018547:Plant Stems / Q000737:chemistry* / Q000528:radiation effects; D012987:Soil / Q000032:analysis*; D014908:Triticum; D014466:Ultraviolet Rays
chemical_list: D012987:Soil; D009609:Nitrous Oxide