BFPSV48H

2703

15 janvier 2021 10:06

15 janvier 2021 10:06

During four years, an experiment was conducted in Western France on two systems, one conventional and one organic. The aim was to produce grass silage with a higher content in proteins by reducing cutting intervals and harvesting mixtures of hybrid ryegrass and red clover at an earlier stage (Early: 5 weeks of regrowth versus 7 for the Control). During winter, the silages were delivered to separate groups of cows. In the conventional system, grass silage represented 40% of the forage diet. In the Early group the total intake increased by 1.7 kg DM d‑1 cow‑1 and cows produced significantly more milk (+1.9 kg d‑1) with no impact on milk quality. In the organic system, grass silage represented 60 to 70% of the forage diet. Intake increased by 4.5 kg DM cow‑1 d‑1 and cows produced significantly more milk (+2.4 kg d‑1 for primiparous and 4.8 kg d‑1 for multiparous cows). The margin over feeding cost for a 75-cow herd was increased by 2,600 € per winter in the conventional system, and by 7,800 € in the organic one. The high increase in silage intakes remains a challenge for the latter. Whatever the production system, producing early cut grass silage of ryegrass and clover mixtures is an efficient way to improve feeding self-sufficiency and milk production.

None

• AB - Modalité bio
• FREDO alimentation animale
• FREDO aspect technico-économique
• GEO France
• autonomie alimentaire
• bovin laitier
• grass
• grass silage
• légumineuses
• protéine
• silage
• tall legumes
• élevage

807

10/2020

1 octobre 2020