&lt;b&gt;Protein fraction, degradability and digestibility of pearl millet silage at different cutting ages &lt;/b&gt;

Alexsandra Paludo,Nayara Fernandes Dos Santos,Kátia Aparecida De Pinho Costa,Welma Santos Cruvinel,Katia Cylene Guimarães,Robson Marcelo Rossi

doi:10.4025/actascianimsci.v36i1.21415

<b>Protein fraction, degradability and digestibility of pearl millet silage at different cutting ages </b>

Alexsandra Paludo, Nayara Fernandes Dos Santos + Show 4 more

Open Access

https://doi.org/10.4025/actascianimsci.v36i1.21415

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Abstract

The determination of protein fraction and rumen fermentation characteristics of pearl millet genotypes is important, since generate information about food nutritional value and also guide the breeding programs of genotypes to be used in diets of ruminants. The objective of this research was to determine the digestion rates of protein fractions, dry matter degradability and in vitro dry matter digestibility of silages from pearl millet genotypes produced at different cutting ages. The experiment was carried out on the Agronomy campus of theRioVerdeUniversityand on the Rio Verde campus of Goiano Federal Institute. The experimental design was randomized blocks with four replications in a 5 x 3 factorial arrangement, with five genotypes of millet: ARD 500, ADR 7010, LAB 0730, LAB 0731 and LAB 0732 and three cutting ages: 57, 65 and 73 days after sowing (DAS). The silage produced from pearl millet, regardless of genotype can be considered of good quality. The evaluated genotypes are considered early, so that the age that provided the best silage quality was 57 DAS. This age provided higher fractions A, lower fraction C and high degradability and digestibility.

Highlights

The number of pearl millet genotypes launched in the market has increased recently, which makes necessary a better nutritional evaluation of these materials in the silage form
The objective of this research was to determine the digestion rates of protein fractions, the in vitro dry matter digestibility and rumen digestibility of dry matter of silages of pearl millet genotypes produced at different cutting ages
The pearl millet genotypes were harvested on days 12, 19 and 26 of May, 2009, which are correlated with the cutting ages of 57, 65 and 73 days after sowing (DAS), respectively

Summary

Introduction

The number of pearl millet genotypes launched in the market has increased recently, which makes necessary a better nutritional evaluation of these materials in the silage form. Some studies describe the nutritional value of pearl millet silage Guimarães, Jr. et al (2008) reported that the energy content of millet grain to be lower than corn. Animal Sciences and sorghum grain, it has a high protein content. This justifies the millet to be indicated as an interesting option for the ensiling process. There are few studies related to the behavior of this feed during the rumen fermentation (PIRES et al, 2010)

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