Efecto del pastoreo rotacional simplificado sobre la producción lechera de vacas Frisonas y Normandas
- A.I. Roca-Fernández
- L. Delaby
- A. González-rodríguez
- Mª.E. López-Mosquera
- Y. Gallard
- S. Leurent
- López-Carrasco Férnandez, Celia (coord.)
- María del Pilar Rodríguez Rojo (coord.)
- Alfonso San Miguel Ayanz (coord.)
- Federico Fernández González (coord.)
- Sonia Roig Gómez (coord.)
Editorial: Sociedad Española para el Estudio de los Pastos
ISBN: 978-84-614-8713-4
Ano de publicación: 2011
Páxinas: 459-466
Congreso: Sociedad Española para el Estudio de los Pastos. Reunión Científica (50. 2011. null)
Tipo: Achega congreso
Resumo
Using a simplified model of rotational grazing, with cycles of 30 days, 10-day residence ongrazing and 20 days off to growth grass, to feed two breeds (F) Friesian and (N) Norman cattle,with two levels of concentrate, low and high (0 and 4 kg/cow/day), were studied in the period2001-09. In each residence time grazing, a peak milk production (PL max.) and drop of milk (CL)were determined independently in the four herds (F0, F4, N0 and N4) throughout lactation. Thepre-and post-grazing pasture heights were superior in plots with (13.2 and 4.7 cm) than without(12.1 and 4.1 cm) supplementation. The milk peak, PL max, happens in the first 4-5 daysof residence time, and the milk drops CL around the tenth day. The largest milk drop with higherpeak, PL max., was in Holstein than in Norman cattle, and the lower milk drop CL and alsohigh peak, was in herd with concentrate, 4 kg/cow, than non-supplemented and in multiparousthan in primiparous cows. Despite the milk drop, CL, after each grazing cycle, milk production isrecovered, but with a minor peak PL in the next cycle. It is possible to extend the grazing timeby a good control of the milk production drops.