Abstract
This study determined the fractionation of protein and carbohydrate of Piata palisadegrass ensiled with energetic meals. The experiment was developed at the Federal Institute of Goiás State, Rio Verde Campus, using a completely randomized design with four replications, in a 4 x 5 factorial arrangement, being four energetic meals (millet, corn, sorghum and wheat) and five levels of addition (0, 8, 16, 24 and 32%). The meals were obtained by grinding the grains, where the levels of addition were calculated based on natural material. The results indicated that the energetic meals represented good sources of additives for ensiling Piata palisadegrass, for considerably improving protein and carbohydrate fractions. However, among the meals used, the sorghum was less efficient by presenting a lower protein fraction (A) and higher fraction C, compared with other additives. The meals of wheat and sorghum showed higher contents of carbohydrate fractions (A+B1 and C). It is recommended the level of addition of 24% of meals, for providing better nutritional value to silage.
Highlights
Brazil has emerged as a major producer of meat and milk in the world, with most of these animals raised on pasture with the need for quality food throughout the year, justifying the maintenance of production performance
The meals used were obtained by grinding the grains in 2 mm-sieve, where the levels of addition were calculated based on natural material of Piata palisadegrass
A linear increase was detected for the fraction A, composed of non-protein nitrogen (NPN), with increasing levels of additive in silage (Table 2)
Summary
Brazil has emerged as a major producer of meat and milk in the world, with most of these animals raised on pasture with the need for quality food throughout the year, justifying the maintenance of production performance. Piatã stands out due to high capacity of forage production and high nutritional value, which makes it one of the main options for intensive animal production systems. There are still few researches on the ensiling process of this grass, making necessary additional studies, since the use of this genus as silage has aroused the interest of farmers, by presenting striking features for the quality of silage (COSTA et al, 2011; EPIFANIO et al, 2014)
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