Scenarios for Reducing Enteric Methane Emission from Small Scale Dairy Production Farms in BaVi, HaNoi

Received: 31-03-2015

Accepted: 02-06-2015

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Issue: Vol. 13 No. 4 (2015)

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CHĂN NUÔI – THÚ Y – THỦY SẢN

How to Cite:

Phung, L., & Ngoan, L. D. (2024). Scenarios for Reducing Enteric Methane Emission from Small Scale Dairy Production Farms in BaVi, HaNoi. Vietnam Journal of Agricultural Sciences, 13(4), 543–550. http://testtapchi.vnua.edu.vn/index.php/vjasvn/article/view/192

Scenarios for Reducing Enteric Methane Emission from Small Scale Dairy Production Farms in BaVi, HaNoi

Le Dinh Phung (*) 1 , Le Duc Ngoan 1

  • 1 Khoa Chăn nuôi Thú y, Trường Đại học Nông Lâm Huế

    • Keywords

    Small scale Dairy production, feeding practices, enteric methane emission scenario

    Abstract


    An investigation was conducted to study the impact of alternative feeding practices on productivity and cattle enteric methane emissions of smallholder dairy systems in Ba Vi, Ha Noi. The study included two phases. During the first phase, data was collected in 30 farms in Ba Vi, Ha Noi through a semi-structured questionnaire. Average farm size (Mean± SD) was 0.85 ± 0.50 ha (15% crop area) and ~ 9 heads of pure and crossbred Holstein Friesian cattle. Herd structure consisted of 11, 25, 17 and 47% of calves, heifers, dry and lactating cows, respectively. Annual milk yield/farm was 28,655 ± 16,035 L (~US$ 20,059). Daily milk yield/cow was 14.1 ± 2.9 L. Using the feed supplied in each farm, the Ruminant model estimated yearly cattle enteric methane emission of 590 ± 359 kg per farm, 14.8 ± 8.99 tones CO2eq/farm and 0.52 ± 0.14 kg CO2 eq/L/milk. In the second phase, data was computed using a fixed representative farm to estimate responses to different feeding practices. Results showed that in comparison with Nepier grass (Pennissetum purpureum) and Guinea (Panicum maximum) or maize (Zea mays; 50% DM of the diet), the use of Ruzzi (Brachiaria ruziziensis) grass improved milk yield up to 14% and reduced enteric methane efficiency up to 9.4%. Potential increase of milk yield (5.3%) and decreased enteric methane efficiency up to 3.6% were predicted when maize silage substituted 50% of the elephant grass.

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