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Use of grass and red clover silage mixtures for milk production and whole-body N partitioning by dairy cows

Moorby, Dr JM; Ellis, Miss NM; Fisher, Mr WJ; Davies, Dr DR and Scollan, Prof ND (2008) Use of grass and red clover silage mixtures for milk production and whole-body N partitioning by dairy cows. Poster at: Cultivating the Future Based on Science: 2nd Conference of the International Society of Organic Agriculture Research ISOFAR, Modena, Italy, June 18-20, 2008.

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Summary

Twenty-four multiparous Holstein-Friesian dairy cows in mid lactation were used in a 44 Latin square changeover experiment with four 4-week periods to investigate the effect of altering the ratios of red clover (RC) and ryegrass silage (GS) in the forage component of their diet. Ratios (in the dry matter (DM)) were: R0, 0 RC:1 GS; R34, 0.34 RC:0.66 GS; R66, 0.66 RC:0.34 GS; R100, RC 1:0 GS. All cows received ad libitum access to their allocated forage with 4 kg of a standard concentrate per day. Results are presented in order of R0, R34, R66 and R100 respectively. Feed DM intakes (16.7, 17.8, 18.3, 19.0 kg d-1, s.e.d. 0.24, Plin<0.001) and milk yields (25.2, 26.1, 26.5, 26.1 kg d-1, s.e.d. 0.47, Plin<0.05, Pquad<0.05) increased as the proportion of RC in the forage increased. Nitrogen (N) intake and excretion of N in urine and faeces increased (P<0.01) with increasing proportion of RC in the diet, but milk N secretion as a proportion of diet N intake, decreased (P<0.01). It is concluded that the best balance of feed intakes, milk yields and efficiency of utilisation of dietary N was achieved when cows were offered a diet with RC silage as 0.66 of the forage.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Poster
Keywords:Red clover silage, grass silage, dairy cows, N balance, milk production
Subjects: Animal husbandry > Production systems > Dairy cattle
Animal husbandry > Feeding and growth
Research affiliation: UK > Institute of Grassland and Environmental Research (IGER)
International Conferences > 2008: IFOAM OWC: Research Track / ISOFAR > 3.3 Animal health and nutrition – ruminants
Deposited By: Moorby, Dr Jon
ID Code:13041
Deposited On:10 Oct 2008
Last Modified:12 Apr 2010 07:36
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted
Additional Publishing Information:This paper is published in the conference proceedings:
Neuhoff, Daniel; Halberg, Niels; Alfldi, Thomas; Lockeretz, William; Thommen, Andreas; Rasmussen, Ilse A.; Hermansen, John; Vaarst, Mette; Lck, Lorna; Carporali, Fabio; Jensen, Henning Hgh; Migliorini, Paola and Willer, Helga, Eds. (2008) .Cultivating the Future Based on Science. Proceedings of the Second Scientific Conference of the International Society of Organic Agriculture Research (ISOFAR), held at the 16th IFOAM Organic World Congress in Cooperation with the International Federation of Organic Agriculture Movements (IFOAM) and the Consorzio ModenaBio, 18 . 20 June 2008 in Modena, Italy.. International Society of Organic Agriculture Research (ISOFAR), c/o IOL, DE-Bonn, Research Institute of Organic Agriculture FiBL, CH-Frick. http://orgprints.org/13672 and http://orgprints.org/13674

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