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Estimation of methane emissions from local and crossbreed beef cattle in Daklak province of Vietnam

  • Ramirez-Restrepo, Carlos Alberto ;
  • Van Tien, Dung ;
  • Le Duc, Ngoan ;
  • Herrero, Mario ;
  • Le Dinh, Phung ;
  • Van, Dung Dinh ;
  • Le Thi Hoa, Sen ;
  • Chi, Cuong Vu ;
  • Solano-Patino, Cesar ;
  • Lerner, Amy M. ;
  • Searchinger, Timothy D.
  • Received : 2016.10.20
  • Accepted : 2017.02.21
  • Published : 2017.07.01

Abstract

Objective: This study was aimed at evaluating effects of cattle breed resources and alternative mixed-feeding practices on meat productivity and emission intensities from household farming systems (HFS) in Daklak Province, Vietnam. Methods: Records from Local $Yellow{\time}Red$ Sindhi (Bos indicus; Lai Sind) and 1/2 Limousin, 1/2 Drought Master, and 1/2 Red Angus cattle during the growth (0 to 21 months) and fattening (22 to 25 months) periods were used to better understand variations on meat productivity and enteric methane emissions. Parameters were determined by the ruminant model. Four scenarios were developed: (HFS1) grazing from birth to slaughter on native grasses for approximately 10 h plus 1.5 kg dry matter/d (0.8% live weight [LW]) of a mixture of guinea grass (19%), cassava (43%) powder, cotton (23%) seed, and rice (15%) straw; (HFS2) growth period fed with elephant grass (1% of LW) plus supplementation (1.5% of LW) of rice bran (36%), maize (33%), and cassava (31%) meals; and HFS3 and HFS4 computed elephant grass, but concentrate supplementation reaching 2% and 1% of LW, respectively. Results: Results show that compared to HFS1, emissions ($72.3{\pm}0.96kg\;CH_4/animal/life$; least squares $means{\pm}standard$ error of the mean) were 15%, 6%, and 23% lower (p<0.01) for the HFS2, HFS3, and HFS4, respectively. The predicted methane efficiencies ($CO_2eq$) per kg of LW at slaughter ($4.3{\pm}0.15$), carcass weight ($8.8{\pm}0.25kg$) and kg of edible protein ($44.1{\pm}1.29$) were also lower (p<0.05) in the HFS4. In particular, irrespective of the HSF, feed supply and ratio changes had a more positive impact on emission intensities when crossbred 1/2 Red Angus cattle were fed than in their crossbred counterparts. Conclusion: Modest improvements on feeding practices and integrated modelling frameworks may offer potential trade-offs to respond to climate change in Vietnam.

Keywords

Household Farming;Methane Emissions;Modelling;Ruminant

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Cited by

  1. Methane, Nitrous Oxide and Ammonia Emissions from Livestock Farming in the Red River Delta, Vietnam: An Inventory and Projection for 2000–2030 vol.10, pp.10, 2018, https://doi.org/10.3390/su10103826
  2. Bodyweight performance, estimated carcass traits and methane emissions of beef-cattle categories grazing Andropogon gayanus, Melinis minutiflora and Stylosanthes capitata mixed swards and Brachiaria humidicola pasture vol.59, pp.4, 2019, https://doi.org/10.1071/AN17624

Acknowledgement

Supported by : Agency for Development Cooperation (NORAD), Commonwealth Scientific and Industrial Research Organisation (CSIRO)