The effect of stage of harvest on the processes of digestion in cattle fed winter oats indoors. I. Digestion of organic matter, neutral detergent fibre and water-soluble carbohydrates

Invited Review: Production and Digestion of Supplemented Dairy Cows on Pasture

“…Dairy cows fed fresh-cut winter oats had highest ruminal pH in fall and late spring, and lowest ruminal Means within reference with different superscripts differ (P < 0.05). pH in late winter and early spring (Elizalde et al, 1994;. Ruminal NH 3 -N concentration were highest in fall and lowest in early and late spring, which was associated with a decrease in the CP content of pasture from 23.3 to 10.3% (Elizalde et al, 1994;.…”

“…Ruminal fermentation on pasture-only diets has been reported for dairy cows consuming the same forage as grazed pasture, hay, or silage (Holden et al, 1994); fresh-cut forage harvested at different seasons (Elizalde et al, 1994;; and pasture fertilized with different amounts of N (Van Vuuren et al, 1992;Mackle et al, 1996;Peyraud et al, 1997) (Table 9). Ruminal NH 3 -N concentration and total VFA concentration were higher in cows grazing an orchardgrass pasture than in cows consuming orchardgrass as hay or silage (Holden et al, 1994).…”

“…pH in late winter and early spring (Elizalde et al, 1994;. Ruminal NH 3 -N concentration were highest in fall and lowest in early and late spring, which was associated with a decrease in the CP content of pasture from 23.3 to 10.3% (Elizalde et al, 1994;. Three studies focused on the effect of N fertilization on ruminal fermentation of dairy cows fed ryegrass (Van Vuuren et al, 1992;Mackle et al, 1996;Peyraud et al, 1997).…”

Consumo médio e digestibilidade aparente dos nutrientes do feno de aveia (Avena sativa L.) e ervilha (Pisum sativum L.) em ovinos submetidos a dois regimes alimentares

“…Verificou-se pela literatura consultada que diversos pesquisadores estudaram o valor nutritivo do feno de aveia, como a composição química e/ou digestibilidade dos nutrientes (Roston & Andrade, 1992;Pereira et al, 1993;Reis et al, 1993;Lopez & Muhlbach, 1994;Elizalde et al, 1994;Zebrowska et al, 1997;Hosoya et al, 1998), bem como o efeito da associação de feno de aveia a diferentes fontes protéicas, como: soja (Pereira et al, 1989), amônia anidra (Ferreira et al, 1993); amônia anidra ou uréia (Grossi et al, 1993); soja crua (Zeoula et al, 1994); canola (Prado et al, 1995); LabLab + milho (Nsahlai & Umunna, 1996), entre outros. Entretanto, foram encontrados poucos trabalhos utilizando-se de grãos de ervilha (Pisum sativum L.) como objeto de estudo em avaliações biológicas com ruminantes.…”

Efectos del momento de asignación diaria de la pastura y del ayuno sobre el comportamiento ingestivo y la productividad de vaquillonas de biotipo carnicero

“…Gran parte de la información bibliográfica coincide en que el nivel de CNES en primavera es mayor que en el otoño (Elizalde et al, 1994;Boudon & Peyraud, 2001), a pesar de que la tasa de crecimiento en primavera y por lo tanto la demanda de carbohidratos solubles, también es superior. Esto podría deberse a que conjuntamente con una elevada tasa de crecimiento, se incrementa el área foliar, y con ello la radiación interceptada y la actividad fotosintética de la pastura (Wulfes et al, 1999).…”