Fatty acid profile in vertical strata of elephant grass subjected to intermittent stocking
An. acad. bras. ciênc
; 89(3): 1707-1718, July-Sept. 2017. tab, graf
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| ID: biblio-886767
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BR1.1
ABSTRACT
ABSTRACT The milk and meat from animals with a pasture-based diet have higher proportions of CLA and C183 and lower omega-6omega-3 ratios than products from animals with diets based on corn silage and concentrate. However, most of the published studies have evaluated fatty acid profiles in temperate climate grasses and the literature with tropical grasses is scarce. Thus, the aim of this study was to evaluate the morphological and fatty acid compositions in the vertical strata of elephant grass (Pennisetum purpureum Schum.) swards subjected to grazing heights (90 or 120 cm pre-grazing heights) and levels of defoliation (50% or 70% removal of the initial pre-grazing height). There were no interactions among pre-grazing height, the level of defoliation and grazing stratum. However, higher proportion of C183 (58% and 63%) was found in the 90-cm swards and in the half upper stratum. A higher proportion of C183 was associated with a higher leaf proportion and crude protein content. Thus, the upper stratum of sward or a grazing management scheme (e.g. first-last stocking) resulting in a higher proportion of leaves and crude protein both provide higher proportions of C183 to animals grazing in elephant grass swards.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
LILACS
Asunto principal:
Ácidos Grasos
/
Poaceae
/
Alimentación Animal
Límite:
Animals
Idioma:
En
Revista:
An. acad. bras. ciênc
Asunto de la revista:
CIENCIA
Año:
2017
Tipo del documento:
Article
País de afiliación:
Brasil
Pais de publicación:
Brasil