Year: 2012
Type: article
Abstract: To investigate the effects of manure application, land uses and soil textures on N 2 O and CH 4 fluxes on Andosol, We selected eight farmer's fi elds covering three cropping systems (rice, maize-fallow, and grass-maize) and four soil textures in an agriculture catchment of central Japan.The amount of applied N from chemical or organic amendments (i.e., compost, urine, and slurry) ranged from 200 to 800 kg N ha -1 .Field gas samples were conducted by static chamber method.The N 2 O fl ux varied from -0.03 to 1.61 g N m -2 h -1 over all of the fi elds through whole year and the annual emission ranged from 1.28 to 9.26 kg N ha -1 yr -1 which account for 0.21-1.08% of applied manure N. The winter crop season showed higher value than summer crop season.Fertilization and rainfall signifi cantly stimulate soil N 2 O fl uxes.Manure types and land uses signifi cantly affect soil N 2 O emission and high values were observed in slurry and upland fi elds.The fl uxes of CH 4 were -24.8-29.1 μg C m -2 h -1 for upland fi elds and -57.5-546 μg C m -2 h -1 for paddy rice, respectively.In this study region, CH 4 emission is mainly found in paddy rice fi eld (0.39 -6.67 kg C ha -1 yr -1 ) rather than upland fields (-0.03 -0.02 kg C ha -1 yr -1 ).For paddy rice fi elds, the CH 4 might be underestimated due to the limited sampling.No significant difference of CH 4 emissions were found in different soil texture, different fertilizer rate and fertilizer type.
Language: English
Subfield: Soil Science
Domain: Life Sciences
SDGs: Climate action, Zero hunger
Open Access status: green
OpenAlex ID: W371950671