52 research outputs found
Batch and continuous biogas production arising from feed varying in rice straw volumes following pre-treatment with extrusion
Potential biogas and methane yield of maize stover fractions and evaluation of some possible stover harvest chains
Mindfulness-based stress reduction program on chronic low-back pain: A study investigating the impact on endocrine, physical, and psychologic functioning
The Effect of Diet and Farm Management on N2O Emissions from Dairy Farms Estimated from Farm Data
The N2O emissions of 21 dairy farms in Germany were evaluated to determine the feasibility of an estimation of emissions from farm data and the effects of the farm management, along with possible mitigation strategies. Emissions due to the application of different fertilisers, manure storage and grazing were calculated based on equations from the IPCC (Intergovernmental Panel of Climate Change) and German emission inventory. The dependence of the N2O emissions on fertiliser type and quantity, cultivated crops and diet composition was assessed via correlation analysis and linear regression. The N2O emissions ranged between 0.11 and 0.29 kg CO2eq per kilogram energy-corrected milk, with on average 60% resulting from fertilisation and less than 30% from fertiliser storage and field applications. The total emissions had a high dependence on the diet composition; in particular, on the grass/maize ratio and the protein content of the animal diet, as well as from the manure management. A linear model for the prediction of the N2O emissions based on the diet composition and the fertilisation reached a predictive power of R2 = 0.89. As a possible mitigation strategy, the substitution of slurry for solid manure would reduce N2O emissions by 40%. Feeding cows maize-based diets instead of grass-based diets could reduce them by 14%
Effect of Steam Explosion Pretreatment on the Specific Methane Yield of Miscanthus x giganteus
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