A 2-year experiment was conducted to study the effects of irrigation andsoil amendment fertilizer on yields of winter wheat and net ecosystem productivity(NEP) of farmland in 2009,2010.Results showed that the maximum yield was 8 894.11 kg/hm2 with irrigation water of 60 mm in jointing stage and fertilized soil amendment fertilizer of 1350 kg/hm2.The optimum amount of SAF fertilization under no irrigation,irrigation once,irrigation twice was 656、920.13 and 872.38 kg/hm2 respectively.Plot CO2 emission under n...
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