Abstract
Small-scale dairy systems in the highlands of central Mexico require feeding strategies based on quality home-grown forage that may reduce high concentrate costs. Eight Holstein cows paired by parity and date of calving were used in a split-plot experiment to evaluate supplementing 6 kg DM/cow/d of oat-vetch silage (OVS) in comparison to maize silage (MS) as dry season feeding, for a more intensive use of the land through an oat-vetch catch crop. Cows had 9 h/d access to continuous grazing of perennial ryegrass – white clover pasture and 4 kg/d of commercial concentrate. The 9 week experiment, recorded weekly milk yield and composition, and body condition score and live-weight every fortnight. Milk yield was 20.1 kg/cow/d for OVS and 15.4 for MS (SEM ±2.9, P > 0.05), with no differences for fat or protein content, body condition score, or live-weight (P > 0.05). The economic analysis showed that although feeding costs were higher for OVS, margins were greater than for MS, with feeding cost per litre of $0.21 for MS and $0.16 for OVS. OVS is a viable catch crop after the MS harvest that can substitute MS in the dry season enabling a more intensive use of the land.
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Abbreviations
- ADF:
-
Acid Detergent Fibre
- ADL:
-
Acid Detergent Lignin
- CP:
-
Crude Protein
- DM:
-
Dry Matter
- m.a.s.l.:
-
metres above sea level
- NHA:
-
Net Herbage Accumulation
- NDF:
-
Neutral Detergent Fibre
- OM:
-
Organic Matter
- SEM:
-
Standard Error of the Mean
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Acknowledgements
The authors express gratitude to the village of Ejido San Cristóbal, particularly Mr. Hermenegildo Reyes – Valdés who ran the demonstration module where the experiment took place, to Ms. Laura Edith Martínez-Contreras and Ms. María de Lourdes Maya-Salazar from Centro de Investigación en Ciencias Agropecuarias (CICA) for the chemical analyses. This work was undertaken with funds from the Universidad Autónoma del Estado de México (project UAEM 1822/2004); our gratitude also to the Mexican National Council for Science and Technology (Consejo Nacional de Ciencia y Tecnología - CONACYT) for the grant received by Yesenia Garduño-Castro.
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Garduño-Castro, Y., Espinoza-Ortega, A., González-Esquivel, C.E. et al. Intercropped oats (Avena sativa) - common vetch (Vicia sativa) silage in the dry season for small-scale dairy systems in the Highlands of Central Mexico. Trop Anim Health Prod 41, 827–834 (2009). https://doi.org/10.1007/s11250-008-9258-7
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DOI: https://doi.org/10.1007/s11250-008-9258-7