Meta-Analysis of Methane Mitigation Strategies: Improved Predictions of Mitigation Potentials and Production Implications
الموضوعات :آ. چیجیوک اوگبانا 1 , ا. رودینو سائتنان 2
1 - Department of Animal Production and Livestock Management, Michael Okpara University of Agriculture, Umudike, Nigeria
2 - Institute of Biological Environmental and Rural Science, Aberystwyth University, Aberystwyth, United Kingdom
الکلمات المفتاحية: methane, meta-analysis, dairy cattle, methane abatement strategies,
ملخص المقالة :
The aim of this study was to use meta-analysis to identify the enteric methane (CH4) mitigation strategy that reduced CH4 emission without lowering production. To this end, a database initially developed was updated, compiling data from 61 publications (233 experiments) for various observations in dairy cattle on effects of hydrogen sink (H-sink), ionophore, lipid and concentrate feeds inclusion on enteric CH4 production, milk production and milk composition from dairy cattle. There was no significant effect (P>0.05) of H-sink and ionophore feeds inclusion on CH4 production while supplementation of lipid and concentrate considerably suppressed CH4 production (P<0.05). CH4 production per kg milk produced was not depressed with H-sink treatment (P<0.05). Lipids lightly increased CH4 production per kg milk from 26.19 g kg−1 for control to 29.12 g kg−1 for treatment (P>0.05), while concentrate and ionophore feeds inclusion decreased CH4 production per kg milk with no significant effect (P>0.05). There was a significant effect of concentrate on milk protein and milk yield, which increased from 23.27 kg d−1 for control to 26.52 kg d−1 for concentrate treated diet (P<0.05). Milk yield and milk protein was not significantly affected with H-sink, ionophore and lipid feeds inclusion (P>0.05). This meta-analysis demonstrates that lipid and concentrate feeds inclusion reduced CH4 emissions from dairy cattle without lowering their production.
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