Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, Nanjing Agricultural University, Nanjing 210095, China.
Environ Pollut. 2012 May;164:73-80. doi: 10.1016/j.envpol.2012.01.029. Epub 2012 Feb 15.
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.
在典型的中国东南部水稻-冬小麦轮作种植制度中，全面考察了施用三价铁肥料对净温室气体平衡（NGHGB）和温室气体强度（GHGI）的影响。采用静态箱法测定了土壤二氧化碳（CO2）、甲烷（CH4）和氧化亚氮（N2O）的年通量，并通过土壤 CO2 排放（R（H））与净初级生产力（NPP）的差值确定了 CO2 的净生态系统交换（NEE）。三价铁肥料的施用显著降低了 R（H），而对水稻和冬小麦的 NPP 没有不利影响。三价铁肥料的施用使季节性 CH4 减少了 27-44%，但使年度 N2O 增加了 65-100%。总的来说，三价铁肥料的施用使年度 NGHGB 和 GHGI 分别减少了 35-47%和 30-36%。在基于水稻的种植制度中，按照当地推荐的用量施用三价铁肥料，可以实现高粮食产量和低温室气体强度。
