Comparative Study Of Emissions Of NO₂ And CH₄ And CO₂ In Glebe Systems By No-tillage And Normal Tillage

The problem that agriculture activity products greenhouse gas has been noticed bypeople and greenhouse gas has become a worldwide problem, and its recovery is a main fieldfor the experts. The study of emissions of greenhouse gases from farmland is a hotspot, andfew scholars have worked on this. The measures of reducing greenhouse gas emission mostlyaim at rice paddy soils and how to improving manage measures of agriculture on rice paddysoils, but less study is about the effect of emissions of greenhouse gas on farmland byno-tillage.This paper managed to study the soil-plant systems by no-tillage and normal tillage, soas to find a effectual way to reducing the emissions of greenhouse gas from soil. Fluxes ofNO2 and CH4 and CO2 were measured using static chamber combined with gaschromatographic techniques under different land uses. Positive relativity among the fluxes of NO2 and CH4 and CO2 and the air temperature andthe moisture of soil appeared when air temperature exceeds 25℃ and soil moisture exceeds20%.the fluxes of CO2 is more than CH4 and N2O on the plant-soil systems of farmland, sothe plant-soil systems of farmland is the releasing-sources of CO2 and the lowreleasing-sources of CH4 and N2O. In the growing season, the plant-soil systems are the releasing –source of NO2 and CH4and CO2 under the deferent treatment (corn soil and soybean soil and grazing soil). The fluxsof CO2 from no-tillage soil are less than those from normal tillage. There is little deference ofthe fluxes of N2O between no-tillage and normal tillage. The result of examination shows thatthe treatment of no-tillage and the alternation of grazing is an effective measure.