title: Fe(III) fertilization mitigating net global warming potential and greenhouse gas intensity in paddy rice-wheat rotation systems in China.
abstract: A complete accounting of net greenhouse gas balance (NGHGB) and greenhouse gas intensity (GHGI) affected by Fe(III) fertilizer application was examined in typical annual paddy rice-winter wheat rotation cropping systems in southeast China. Annual fluxes of soil carbon dioxide (CO(2)), methane (CH(4)) and nitrous oxide (N(2)O) were measured using static chamber method, and the net ecosystem exchange of CO(2) (NEE) was determined by the difference between soil CO(2) emissions (R(H)) and net primary production (NPP). Fe(III) fertilizer application significantly decreased R(H) without adverse effects on NPP of rice and winter wheat. Fe(III) fertilizer application decreased seasonal CH(4) by 27-44%, but increased annual N(2)O by 65-100%. Overall, Fe(III) fertilizer application decreased the annual NGHGB and GHGI by 35-47% and 30-36%, respectively. High grain yield and low greenhouse gas intensity can be reconciled by Fe(III) fertilizer applied at the local recommendation rate in rice-based cropping systems.
authors.affiliation: Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, Nanjing Agricultural University, Nanjing 210095, China.
authors.forename: Shuwei
authors.initials: S
authors.lastname: Liu
authors.forename: Ling
authors.initials: L
authors.lastname: Zhang
authors.forename: Qiaohui
authors.initials: Q
authors.lastname: Liu
authors.forename: Jianwen
authors.initials: J
authors.lastname: Zou
mesh_terms: D000383:Agriculture / Q000379:methods*; D000393:Air Pollutants / Q000032:analysis*; D000397:Air Pollution / Q000517:prevention & control* / Q000706:statistics & numerical data; D057486:Carbon Cycle; D057965:Carbon Sequestration; D002681:China; D052918:Environmental Restoration and Remediation / Q000379:methods*; D005308:Fertilizers; D057232:Global Warming; D017752:Greenhouse Effect; D007501:Iron / Q000737:chemistry*; D008697:Methane / Q000032:analysis; D009609:Nitrous Oxide / Q000032:analysis; D012275:Oryza; D014908:Triticum
chemical_list: D000393:Air Pollutants; D005308:Fertilizers; D007501:Iron; D009609:Nitrous Oxide; D008697:Methane