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Use of orange leaves as a replacement for alfalfa in energy and nitrogen partitioning, methane emissions and milk performance of murciano-granadina goats

Authors :
J.L. Palomares
J. Jorro-Ripoll
J.V. Segarra
I. Pérez-Baena
José V. Martí
Carlos Fernández
Source :
RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia, instname
Publication Year :
2019
Publisher :
Elsevier BV, 2019.

Abstract

[EN] The objective of this experiment was to study the effects of substituting alfalfa with orange leaves on energy, nitrogen and carbon balance, methane emission, and milk performance in dairy goats. Ten Murciano-Granadina dairy goats in mid lactation (43.5 +/- 3.59 kg of body weight [BW]) were selected in a crossover design experiment, where each goat received two treatments in 2 periods. One group of five goats was fed a mixed ration with 450 g of pelleted alfalfa and 550 g of pelleted concentrate/kg of dry matter (ALF diet), and the other diet replaced alfalfa with orange leaves (ORG diet). Inclusion of ORG than ALF diet reduced (P = 0.041) dry matter intake. The metabolizable energy intake was identical between treatments (901 kJ/kg of BW0.75, on average) and, the efficiency of metabolizable energy for milk production was 0.73. Retention of energy was lower (P = 0.001) in ORG diet than ALF diet. Carbon and nitrogen intake (P = 0.022 and P = 0.004, respectively) was greater for diet ALF than ORG, with no differences in milk carbon and nitrogen. The ORG diet reduced (P = 0.037) milk fat 3 g/kg, and CH4 (P = 0.001) 6 g/d. One of the milk fatty acids positively correlated with CH4 production was C16:0; it was greater (P < 0.05) in ALF than ORG diet. When CH4 was expressed over OM digestibility and milk basis, differences were preserved. Results suggest that orange leaves are effective in reducing CH4 emission without detrimental effect on nutrients balance and milk yield.<br />This study was supported by HELIOTEC S.L., La Vall d'Uixo, Castellon de la Plana, Valencia, Spain, though LIFE Ecocitric Project and, LIFE2016/CCM/ES/000088 LOW CARBON FEED.

Details

ISSN :
03778401
Volume :
247
Database :
OpenAIRE
Journal :
Animal Feed Science and Technology
Accession number :
edsair.doi.dedup.....3e872bd3379c2ba7119e16d9436985d1
Full Text :
https://doi.org/10.1016/j.anifeedsci.2018.11.008