Achieving high milk production performance at grass with minimal concentrate supplementation with spring-calving dairy cows: actual performance compared to simulated performance
| العنوان: | Achieving high milk production performance at grass with minimal concentrate supplementation with spring-calving dairy cows: actual performance compared to simulated performance |
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| المؤلفون: | O'Donovan, M., Ruelle, Elodie, Coughlan, F., Delaby, Luc |
| المساهمون: | Animal and Grassland Research and Innovation Centre, Irish Agriculture and Food Development Authority, Physiologie, Environnement et Génétique pour l'Animal et les Systèmes d'Elevage [Rennes] (PEGASE), Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), AGROCAMPUS OUEST-Institut National de la Recherche Agronomique (INRA) |
| المصدر: | Grassland and forages in high output dairy farming systems 18. Symposium of the european grassland federation 18. Symposium of the european grassland federation, Jun 2015, Wageningen, Netherlands. Wageningen Academic Publishers, Grassland Science in Europe, 20, 2015, Grassland Science in Europe Grassland and forages in high output dairy farming systems. (20)2015; 18. Symposium of the european grassland federation, Wageningen, NLD, 2015-06-15-2015-06-17, 113-115 18. Symposium of the european grassland federation, Jun 2015, Wageningen, Netherlands. Wageningen Academic Publishers, 20, 2015, Grassland Science in Europe |
| بيانات النشر: | HAL CCSD, 2015. |
| سنة النشر: | 2015 |
| مصطلحات موضوعية: | dairy production, potential, troupeau laitier, animal diseases, dairy cow, [SDV]Life Sciences [q-bio], food and beverages, système herbager, grass milk, herd dynamic milk model, vache laitière, production de lait, modélisation |
| الوصف: | The aim of high-profitability grazing systems is to produce milk efficiency from grazed pasture. There is very limited information available on the milk production capacity of dairy cows offered a grass-only diet for the main part of her lactation. In this study, spring-calving dairy cows were managed to achieve high milk production levels throughout the grazing season without supplementation. The calving date of the herd was 12 April; the herd had access to grass as they calved and remained full-time at grass until 20 November. During this period the herd produced 5,513 kg milk, while receiving 130 kg concentrate supplementation. The herbage mass offered was maintained at 1,490 kg dry matter ha‑1 (>3.5 cm) and the herd grazed to 4.5 cm across the grazing season. The weekly milk production performance achieved was then compared to the Herd Dynamic Milk model. The root mean square error (RMSE) and relative predicted error (RPE) for milk yield (as expressed weekly across lactation) was 1.47% and 6.09%, respectively, for body condition score the RMSE and RPE were 0.093% and 4.14% respectively. Offering spring-calving cows high levels of high quality grass resulted in excellent animal performance, however, this can be achieved with very good daily grazing management. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::2cd4c0e1d67da23e972236304ebe8a0d https://hal.archives-ouvertes.fr/hal-01211021 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.dedup.wf.001..2cd4c0e1d67da23e972236304ebe8a0d |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |