Field Managements Affect Yield, Soil Carbon, and Greenhouse Gases Emission of Winter Wheat in North China Plain
Five dominant field managements in winter wheat field in North China Plain( NCP)are chosen as treatments. That is (1 )residue re moval(TRR), (2)residue mulch(TRM), (3)No Tillage(TNT), (4)residue incorporation (TRI)and (5)manure(TM). Using automatic cham ber and GC measurement system in the field to monitor the greenhouse gases emitted from the field during whole season, by ~(13)C nature abun dant method to monitor carbon turnover, winter wheat yield and soil organic carbon is also been monitored. The results showed that:The treat ment yield in descending order is TM, TRI, TRM, TNT and TRR respectively, same tendency with the soil organic carbon (SOC )renewing percentage. TM can more significantly increase yield and SOC, while TRR and TNT can slightly drop the yield and SOC. The methane from winter wheat field is less than 1% to total GHG emission and maybe neglectable, and N_2O account for 2.55%～11.62% to total GHG emission in winter wheat field. The major N_2O emission start from jointing stage and TNT, TM, TRI has higher N2O emission around 10% of total GHG emission, while TRR, TRR has lower N_2O emission around 3% of total GHG emission. CO_2 account for over 88% total GHG emission in winter wheat field and for TRM and TNT the portion is over 95%. In general comparison, TRI has relatively higher grain yield, SOC renewed and SOC increasing, and relatively lower GHG emission. It is a good method for carbon sequestration and GHG abatement.
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NSTL
万方数据
维普
