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Feeding Biochar to Cows:An Innovative Solution for Improving Soil Fertility and Farm Productivity

Pedosphere 2015年第5期25卷 666-679页

作者： Stephen JOSEPH Doug POW Kathy DAWSON David R.G.MITCHELL Aditya RAWAL James HOOK Sarasadat TAHERYMOOSAVI Lukas VAN ZWIETEN joshua rust Scott DONNE Paul MUNROE Ben PACE Ellen GRABER Torsten THOMAS Shaun NIELSEN Jun YE Yun LIN PAN Genxing LI Lianqing Zakaria M.SOLAIMAN Discipline of Chemistry University of Newcastle School of Materials Science and Engineering University of New South Wales Electron Microscopy Center AIIMUniversity of Wollongong Institute of Resources Ecosystem and Environment of AgricultureNanjing Agricultural University Marron Brook Farm Warren Catchments Council 52 Bath StManjimup 6258 (Australia) Mark Wainwright Analytical Centre University of New South Wales Wollongbar Primary Industries Institute NSW Department of Primary Industries Institute of Soil Water and Environmental SciencesThe Volcani CenterAgricultural Research Organization Centre for Marine Bio-Innovation School of Biotechnology and Biomolecular SciencesThe University of New South Wales Soil Biology and Molecular Ecology Group School of Earth and Environment (M087)The University of Western Australia

Addition of biochar produced through thermal decomposition of biomass has been seen as a strategy to improve soils and to sequester carbon （C）, but wide scale implementation of the technology requires to devise innovative profitable solutions. To develop biochar utilisation with an integrated system approach, an innovative program was implemented in 2012 on a 53-ha farm in Western Australia to determine the costs and benefits of integrating biochar with animal husbandry and improvement of pastures. Biochar was mixed with molasses and fed directly to cows. The dung-biochar mixture was incorporated into the soft profile by dung beetles. We studied the changes in soil properties over 3 years. Biochar extracted from fresh dung and from the soil to a depth of 40 cm was characterised. A preliminary financial analysis of the costs and benefits of this integrated approach was also undertaken. The preliminary investigation results suggested that this strategy was effective in improving soil properties and increasing returns to the farmer. It was also concluded that the biochar adsorbed nutrients from the cow＇s gut and from the dung. Dung beetles could transport this nutrient-rich biochar into the soil profile. There was little evidence that the recalcitrant component of the biochar was reduced through reactions inside the gut or on/in the soil. Further research is required to quantify the long-term impact of integrating biochar and dung beetles into the rearing of cows.

关键词： animal husbandry biochar C sequestration dung beetles financial benefit pasture

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