Increasing dietary levels of citral oil on nutrient total tract digestibility, ruminal fermentation, and milk composition in Saanen goats

Author(s)

Canaes, Taissa S. ; Zanferari, Filipe ; Maganhe, Bruna L. ; Takiya, Caio S. ; Silva, Thiago H. ; Del Valle, Tiago A. ; Renno, Francisco P.

• Document type: Journal article
• Source: ANIMAL FEED SCIENCE AND TECHNOLOGY; v. 229, p. 47-56, JUL 2017.
• Web of Science Citations: 4

Abstract

This study was undertaken to evaluate the effects of increasing dietary doses of high purity citral oil on nutrient total tract digestibility, ruminal fermentation, blood metabolites, milk yield and composition, and N utilization in dairy goats. Twenty-four Saanen goats {[}62 +/- 1.4 kg of body weight (BW), 75 +/- 20 days in milk, and 3.0 +/- 0.27 kg/d of milk yield, at the start of experiment], being eight of them rumen-cannulated, were used in a 4 x 4 Latin square design experiment with 21-d periods in which the first 14 d were allowed to treatment adaptation. Animals were assigned to the following treatments: control, with no citral supply; and dietary addition of 0.08, 0.16 or 0.24 mL of citral oil per kg of BW. Increasing doses of citral oil did not affect dry matter (DM) and nutrient intake, but it linearly decreased neutral detergent fiber total tract digestion in dairy goats. Treatments neither affected ruminal pH nor NH3-N, but citral oil linearly increased butyrate proportion in ruminal fluid of goats. Citral oil consumption had a positive quadratic effect on ruminal propionate (mmol/dL and mmol/100 mmol) and butyrate (nunol/dL) in goats. Treatments had a negative quadratic effect on ruminal acetate to propionate ratio and acetate proportion. Citral consumption by dairy goats linearly decreased blood urea concentration. Although treatments did not affect milk and fat-corrected milk yield, citral oil linearly decreased milk fat production in goats. Citral had no effect on milk fatty acid profile and N utilization in goats. Citral consumption had no effect on DM and nutrient intake as well as on fat -corrected milk yield, but it may increase ruminal propionate concentration in dairy goats. (AU)

• FAPESP's process: 12/01863-0 - Productive performance, digestion and metabolism in Saanen dairy goats fed with different levels of citral (3,7-dimethyl-2,6-octadienal)
• Grantee: Francisco Palma Rennó
• Support type: Regular Research Grants
• FAPESP's process: 11/06260-9 - PRODUCTIVE PERFORMANCE, DIGESTION AND METABOLISM OF LACTATING SAANEN GOATS FED DIFFERENT CONCENTRATIONS OF CITRAL (3,7-dimethyl-2,6-octadienal)
• Grantee: Taissa de Souza Canaes
• Support type: Scholarships in Brazil - Post-Doctorate