Effect Of Different Fertilizer Types And Reclamation Years On Emissions Of Greenhouse Gas In The Yanbian Paddy

The north of the national agricultural ecological system of the paddy field ecosystem has important contribution to the greenhouse effect. Seeking the connection between the different factors and soil in greenhouse gas emissions, will to help you on greenhouse gas emissions and their regularity and correct understanding of the emission reduction measures, which can offer theory evidence to reduce greenhouse gas emissions and reduce the uncertainty of climate change predictions. This study chose the northeast of the Yanbian area which had the longest history in planting paddy fields as the research object, by used the static opaque chamber-GC techniques research from the perspective of fertilization and cultivated fixed number of year paddy ecosystem growing season and the law of soil in greenhouse gas emissions growth season. The results indicated that:1. The whole rice growth season rice three kinds of greenhouse gas emissions has obvious seasonal characteristic. Compared with the shorter open up wasteland for farming age limit(60years), the longer one(80-120) promoted the CO2 and CH4 emissions, also inhibited the release of the paddy soil N2O. Especially application of organic manure can increase the soil organic matter content, promoted the CO2 and CH4 emissions, but inhibit N2O emissions. Especially the mixture of organic manure and chemical fertilizer application of greatly promoted the CH4 emissions, compared with the single organic fertilizer and fertilizer processing, monthly throughput increased by 55.69% and 698.37% respectively, but obvious inhibitory effect on paddy soil N2O emission. CH4 daily average emission flux and soil ammonium nitrogen content between indices were significantly related. N2O emissions from rice fields has obvious relevance, the water content of the paddy field ecosystem field drying when promoting N2O emissions.2. In the thawing period rice cultivated fixed number of year is shorter (60 years) which in inhibition of soil CO2 and CH4 emissions, had promoted the N2O emissions. Greenhouse gas emissions rules with different types of soil fertilizer the 3 kinds of greenhouse gases (CO2, CH4, N2O) behave differently. Completely organic fertilizer can increase the content of organic matter in soil, and promote the rice growth season and paddy soil freezing and thawing period of CO2 emissions, the freezing and thawing period of single organic fertilizer treatment than organic fertilizer mixed with chemical fertilizer application and fertilization of chemical fertilizer treatment increased by 35.53% and 18.04% respectively. Fertilization of chemical fertilizer in the paddy soil to promote CH4 emissions, the freezing and thawing period than organic fertilizer fertilization of chemical fertilizer treatment with single organic fertilizer mixed with chemical fertilizer application treatment increased by 104.10% and 89.40% respectively. Organic fertilizer mixed with fertilizer application promoted the N2O emissions, the freezing and thawing period, single organic fertilizer, organic fertilizer mixed with chemical fertilizer application of single fertilizer three fertilizer types mean soil N2O emissions were 11.85 mg·m-2、10.00 mg·m-2？1.43mg·m-2, the processing of organic fertilizer and fertilizer application at the same time and organic fertilizer fertilization of processing a single chemical fertilizer treatment increased by 87.93% and 85.70% respectively. Freezing and thawing period daily CO2 flux and soil surface temperature has significant linear correlation between, but no significant influence on the CH4 and N2O emissions.3. Paddy greenhouse gas emissions generated by warming potential, cultivated fixed number of years to be the shortest, in the local traditional way of fertilizer (LCF) processing for comparison, several other processing scale of 20-500, increased by 3.17-25.80 times in emissions.