Contribution of Urine and Dung Patches from Grazing Sheep to Methane and Carbon Dioxide Fluxes in an Inner Mongolian Desert Grassland

Asian-Australasian Journal of Animal Sciences

Mario Tenuta¹  Ding Huang²  Chengjie Wang³  Pei Zhou³  Shiming Tang³  Guodong Han³ 

[1] Department of Soil Science, University of Manitoba, Winnipeg, Manitoba,R3T 2N2.Canada;Institute of Grassland Science, China Agricultural University, Beijing 100094, .China;;

关键词: Sheep;    Urine and Dung Patches;    CO and CH Fluxes;    Greenhouse Effect;    Inner Mongolia Desert Grassland;   

DOI  :  10.5713/ajas.2011.11261

来源: DOAJ

【 摘 要 】

The effects of sheep urine and dung patches on methane (CH4) and carbon dioxide (CO2) fluxes were investigated during the summer-autumn in 2010, to evaluate their contribution to climate change in a desert grassland in Inner Mongolia, China. Results indicate that the cumulative CH4 emissions for dung patches, urine patches and control plots were − −0.076, −0.084, and −0.114 g/m2 and these were net CH4 sinks during the measured period. The level of CH4 intake from urine and dung plots decreased 25.7%, and 33.3%, respectively, compared with a control plot. CO2 fluxes differed (p<0.01) in urine plots, with an average of 569.20 mg/m2/h compared with control plots (357.62 mg/m2/h) across all sampling days. Dung patches have cumulative CO2 emissions that were 15.9% higher compared with the control during the 55-d period. Overall, sheep excrement weakened CH4 intake and increased CO2 emissions.

【 授权许可】

Unknown