Effects of plastic sheet covering on greenhouse gas emission from beef cattle manure during storage

In order to assess the effects of plastic sheet covering on CH sub(4), N sub(2)O and CO sub(2) emissions during short-term storage of beef cattle manure, the greenhouse gas emission rate was investigated in autumn (September 7, 2013 - October 6, 2013, average air temperature was 22.87[degrees]C) by the static chamber - gas chromatography (GC) method. Meanwhile, ambient air temperatures and manure temperatures (10 cm below the surface) were measured every 5 minutes using automatic temperature recorder. The result showed that the density and free water content of the manure of covering group were significantly higher than that of control group (P>0.01). In addition, plastic sheet covering storage could reduce the N sub(2)O and CO sub(2) emissions by 94.85% ( sub(P)>0.01) and 88.85% ( sub(P)>0.01), respectively.