Plasma fatty acid profile in dairy cows associated with the inclusion of annatto in their diet

The objective of this study was to evaluate the plasma lipid profile and plasma fatty acids of dairy cows receiving diets supplemented with annatto. A total of 32 Holstein cows (550 kg), distributed in a completely randomized design, were allocated to individual stalls and submitted to following treatments: C0 = no annatto; C4 = inclusion of annatto at 4 g kg-1 dry matter (DM) of diet (0.07 g bixin kg-1 diet); C5 = inclusion of annatto at 5 g kg-1 DM of diet (0.09 g bixin kg-1 diet); and C7 = inclusion of annatto at 7 g kg-1 DM of diet (0.12 g bixin kg-1 diet). Blood samples were collected via epigastric vein puncture, centrifuged, and frozen for subsequent analysis. The results indicate that the inclusion (p > 0.05) of annatto does not decrease the total cholesterol or low and high density lipoproteins. However, it impacts the profile of fatty acids, evidenced by the reduction (p < 0.05) in levels of hypercholesterolemic fatty acids viz, myristic acid and palmitic acid. It also causes an increase in the levels of arachidonic acid, rumenic acid, linoleic acid, and total polyunsaturated fatty acids. Therefore, bixin included in the diets of dairy cows induces changes in the plasma fatty acid profile.(AU)

Plasma fatty acid profile in dairy cows associated with the inclusion of annatto in their diet

The objective of this study was to evaluate the plasma lipid profile and plasma fatty acids of dairy cows receiving diets supplemented with annatto. A total of 32 Holstein cows (550 kg), distributed in a completely randomized design, were allocated to individual stalls and submitted to following treatments: C0 = no annatto; C4 = inclusion of annatto at 4 g kg-1 dry matter (DM) of diet (0.07 g bixin kg-1 diet); C5 = inclusion of annatto at 5 g kg-1 DM of diet (0.09 g bixin kg-1 diet); and C7 = inclusion of annatto at 7 g kg-1 DM of diet (0.12 g bixin kg-1 diet). Blood samples were collected via epigastric vein puncture, centrifuged, and frozen for subsequent analysis. The results indicate that the inclusion (p > 0.05) of annatto does not decrease the total cholesterol or low and high density lipoproteins. However, it impacts the profile of fatty acids, evidenced by the reduction (p < 0.05) in levels of hypercholesterolemic fatty acids viz, myristic acid and palmitic acid. It also causes an increase in the levels of arachidonic acid, rumenic acid, linoleic acid, and total polyunsaturated fatty acids. Therefore, bixin included in the diets of dairy cows induces changes in the plasma fatty acid profile.

Valor nutritivo da silagem de dez híbridos de milho / Nutritional value of silage from ten corn hybrids

Objetivou-se avaliar a composição químico-bromatológica e a digestibilidade aparente de dez híbridos de milho (DK265bm3, DK265, HS5, HS6, HTV2, HTV27, Anjou285, Mexxal, Pistache e Buxxil) cultivados no INRA (Unité de Génétique et d'Amélioration des Plantes Fourragères, Lusignan-France), em parcelas de 150 m2 , com três repetições. Para o estudo de digestibilidade in vivo, os ovinos foram alimentados com silagem da planta inteira dos híbridos de milho com três repetições. Os híbridos de milho foram avaliados antes de ensilados pelo método NIRS, em que se pode constatar que houve diferença (p < 0,05) entre os híbridos para a composição química. Quanto aos valores de digestibilidade in vivo, observou-se que, o DK265bm3 se destacou dos demais híbridos quanto aos valores de MS, MO, celulose, PC e da DIVMS.

The objective of this experiment was to evaluate the chemical-bromatological composition and apparent digestibility of ten hybrids of corn (DK265bm3, DK265, HS5, HS6, HTV2, HTV27, Anjou285, Mexxal, Pistachio and Buxxil) planted at INRA (Unité of Génétique Amélioration des Plantes Fourragères, Lusignan-France), in 150 m2 areas with three replications. The digestibility study was conducted using sheep fed corn hybrid whole plant silage with three replications. Corn hybrids were evaluated before ensilage using NIRS, and a significant difference (p < 0.05) was observed among treatments for chemical composition. DK265bm3 showed higher values than other hybrids for digestibility of DM, OM, cellulose, NDF and for IVDMD.