Methane Mitigation in Crossbred Bullocks by Urea Treated Wheat Straw & Lucerne Straw Based Total Mixed Ration
V. J. Gosvami, P. R. Pandya, K. K. Sorathiya, Shwetal Shah
Current Journal of Applied Science and Technology · pp. 39–46 · Published 19 Nov 2022
10.9734/cjast/2022/v41i403989Abstract
Present experiment was conducted to study the effect of feeding lucerne straw and urea treated wheat straw based TMR (Total Mixed Ration) on nutrients intake, digestibility of nutrients, rumen parameters, rumen microbial protein synthesis and enteric methane emissions in crossbred bullocks. Experiment was conducted on 15 crossbred bullocks for 50 days using Completely Randomized Design. The animals in control group (T1) were fed TMR with 70% wheat straw and 30% concentrate. The animals in experimental group T2 were fed TMR with 35% urea treated wheat straw, 35% wheat straw and 30% concentrate whereas, animals in T3 group were fed TMR with 35% lucerne straw, 35% wheat straw and 30% concentrate. The intakes of nutrients and rumen parameters were not affected by the treatments. Digestibility coefficients of crude protein (CP), ether extract (EE) and hemicellulose (HC) did not differ significantly among the groups. Similarly, digestibility coefficients of dry matter (DM) and nitrogen-free extract (NFE) did not differ significantly between T1 & T2 group, and significant reduction was reported in T3 group. Crude fibre (CF), NDF (neutral detergent fibre), ADF (acid detergent fibre) and cellulose digestibility was significantly higher in T2 group, whereas significant reduction noted in NDF, ADF and cellulose digestibility in T3 group, as compared to T1 group. Rumen microbial protein synthesis improved by 17.22% (p>0.05) in T2 group, but almost similar value was reported in T3 group, as compared to control group. Average daily methane emission in T2 and T3 group reduced significantly by 16.20% and 17.71%, as compared to T1 group. The energy loss in the form of methane (CH4) as % of gross energy intake (GEI) in T2 and T3 groups reduced numerically by 11.10% and 15.66% (p>0.05), as compared to T1 group. Hence, inclusion of urea treated wheat straw and lucerne straw in wheat straw based TMR helped in reducing enteric methane emissions in crossbred bullocks.
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Swati Hegde, Tim Searchinger, Mario Julien Díaz · World Resources Institute · 2025
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