Le pâturage tournant pour des truies gestantes en plein-air : un levier pour diminuer la consommation d'aliment en agriculture biologique
- Title
- Le pâturage tournant pour des truies gestantes en plein-air : un levier pour diminuer la consommation d'aliment en agriculture biologique
- Journées Recherche Porcine
- Creator
- Antoine Roinsard
- Florence Maupertuis
- Cyrielle Gain
- Patrice Pierre
- Subject
- Agriculture biologique
- Plein air
- Pâturage
- Pâturage tournant
- Truie
- Date
- 2019
- Abstract
-
In organic farming, 44% of pregnant sows are raised outdoors. To reduce concentrated feed intake, it would be useful to develop an innovative feeding management system that would increase the value of the free-range area. Rotational grazing on grassland rich in legumes was established for pregnant sows at the Trinottières experimental station (Maine-et-Loire, France) for 2 consecutive years. To enhance the value of grazing, the experimental concentrated feed distributed was restricted to 80% of that of the control groups (those outside the grazing period) and was less rich in protein (10.2% crude protein vs. 13.6% for the control). The objectives were to (i) assess the impact on sow performance, (ii) assess the contribution of grazing to fulfilling feed requirements, (iii) quantify grass intake, and (iv) describe sow preferences for specific species. Grazing sows had the same back fat thickness gain but a slightly lower live weight gain, related to reduced motivation to graze at the end of gestation. The nutritional needs of "grazing" sows were calculated using INRAPorc software. As a result, grazing contributed on average to about 22% of the metabolisable energy requirement and 33% of the digestible lysine requirement. The biomass ingested was 1.75 kg of dry matter (DM)/day/sow and showed high animal variability (0.2 to 4 kg DM/day). Finally, sows expressed a strong preference for consuming legumes. Implementing efficient pasture management for pregnant sows reduced annual feed costs by 16% and concentrated feed
consumption by 9%. However, because of reduced grass intake, special attention should be paid at the end of gestation (increase the quantity of concentrated feed) to ensure safe weight gain for sows. - issue
- 51
- pages
- 165-166
- Language
- fr
- Item sets
- Porks diet, impacts and consequences