Effect of Manure Quantity and Quality on GHG Fluxes from Tropical Pastures in Kenya
Zhu Yuhao1, Lutz Merbold2, David Pelster2, Eugenio Diaz-Pines3, Klaus Butterbach-Bahl1
1Karlsruhe Institute of Technology, Inst. of Meteorology and Climate Research, Atmospheric Environmental Research, Germany
Dung patches on grazed rangeland are a major source of anthropogenic GHGs emissions from agricultural systems. Dung is rich in available carbon and nitrogen, thus, supporting microbial processes such as methanogenesis, nitrification and denitrification. These processes are driving greenhouse gas emissions from dung. However, the amount and quality of dung patches depends on nutritional status and feed intake of the livestock. Factors, which so far have not been considered in most studies focusing on GHG emissions from dung. Moreover, our study focus on Kenya, a country in sub-Saharan Africa (SSA), for which little to nothing is known about regarding manure induced GHG emissions. Using an automated chamber system, we investigated the effect of manure quality and quantity on dung patches' GHG emissions in the dry and wet season. Experiments were done on the campus of the International Livestock Research Institute, Nairobi, Kenya.
Keywords: Dung patches, GHGs emissions, manure quantity and quality, sub-Saharan Africa
Contact Address: Zhu Yuhao, Karlsruhe Institute of Technology, Inst. of Meteorology and Climate Research, Atmospheric Environmental Research, Kreuzeckbahnstr. 19, 82467 Garmisch-partenkirchen, Germany, e-mail: yuhao.zhukit.edu