Effects of Different Combinations of Organic Fertilizer and Inorganic Fertilizer on Emission of CO_2 and CH_4 in Vegetable Field

The effects of combined application of organic fertilizer and inorganic fertilizer on emission flux of CO2 and CH4 in vegetable field were studied through field plot test.The results showed that the application of organic fertilizer can promote the emission of CO2 and CH4,the average CO2 emissions in each treatment with combined application of organic fertilizer and inorganic fertilizer were significantly higher than that in CK(non fertilization),T1(no nitrogen application) and T2(application of pure inorganic fertilizer);in comparison with directly combined application of pig manure and inorganic fertilizer,the treatment with combined application of composted pig manure and inorganic fertilizer can reduce emission of CO2 and CH4 in vegetable field;moreover,with combined application of organic fertilizer and inorganic fertilizer,the emission flux of CO2 in soil of vegetable field showed a positive correlation with soil temperature at 5 cm and 10 cm of soil layer underground;emission flux of CH4 in soil was influenced by soil temperature,air temperature outside box and soil water content,but there were non significant linear relationship between them.