RT Journal Article
T1 Effects of different strategies of mineral supplementation (marine algae alone or combined with rumen boluses) in organic dairy systems
T2 Efecto de diferentes estratexias de suplementación mineral (algas mariñas ou en comvinación con bolos ruminais) en sistemas de produción leiteira ecolóxica
A1 López Alonso, María Marta
A1 Rey Crespo, Francisco
A1 Orjales Galdo, Inmaculada
A1 Rodríguez Bermúdez, Ruth
A1 Miranda Castañón, Marta Inés
K1 Dairy cattle
K1 Minerals
K1 Milk
K1 Algae
K1 Rumen boluses
K1 Organic systems
AB This study was designed to evaluate the effect of marine algae supplementation alone or in combination with a regular mineral supplement (rumen boluses) to improve the mineral status in organic dairy cattle and their effect on the milk mineral composition, milk production, composition (% of fat and protein) and quality (SCC). Thirtytwo Holstein Friesian lactating cows were randomly selected and assigned to the algae (A), boluses (B), algae+ boluses (AB) and control group (C). For the algae groups (A, AB), a supplement composed of Sea Lettuce (80%), Japanese Wireweed (17.5%) and Furbelows (2.5%) was formulated to be given to the cows at the rate of 100 g/ animal per day (A1) for the length of 4 weeks. In the second half of the experiment (weeks 5–8), the algae mixture was reformulated and the proportion of Furbelows was increased from 2.5% to 5.0% with a subsequent decrease of Lettuce to 77.5% (A2). In the boluses group (B), each cow received 2 boluses after calving. Blood (serum) and milk samples were collected at 2 and 4 week intervals, respectively, and analysed for trace element concentrations by ICP-MS. Information related to the milk composition and SCC during a 305-day lactation for each animal were obtained from the Dairy Records Management System. The supplementation with algae, boluses or the combination of both treatments showed a statistically significant effect on the iodine (algae), selenium (boluses) and cobalt (algae+boluses) status of the animals. In milk, treatments had a statistical significant increase on iodine, and a tendency to increase selenium concentrations. The assayed algae mixture combined with another source of selenium could be an effective tool to improve the mineral status in serum and milk.
PB Blackwell Verlag GmbH
SN 1439-0396
YR 2016
FD 2016-03-14
LK https://hdl.handle.net/10347/38316
UL https://hdl.handle.net/10347/38316
LA eng
NO López-Alonso, M., Rey-Crespo, F., Orjales, I., Rodríguez-Bermúdez, R. and Miranda, M. (2016), Effects of different strategies of mineral supplementation (marine algae alone or combined with rumen boluses) in organic dairy systems. J Anim Physiol Anim Nutr, 100: 836-843. https://doi.org/10.1111/jpn.12449
NO Effects of different strategies of mineral supplementation (marine algae alone or combined with rumen boluses) in organic dairy systems
NO Centro Tecnolóxico Agroalimentario de Lugo (CETAL).
NO Porto Muiños S.L.
NO Casa Grande de Xanceda (Mesía, A Coruña)
DS Minerva
RD 23 abr 2026