Application of the multivariate and univariate analyses to estimate the feed efficiency in beef cattle

Tadeu Silva de  Oliveira; Ismael Nacarati  Silva; Elon Souza  Aniceto; José Ribeiro Meirelles  Júnior

doi:10.14393/BJ-v39n0a2023-67310

Authors

Tadeu Silva de Oliveira Universidade Estadual do Norte Fluminense https://orcid.org/0000-0001-7703-9323
Ismael Nacarati Silva Universidade Estadual do Norte Fluminense https://orcid.org/0000-0002-8726-5479
Elon Souza Aniceto Universidade Estadual do Norte Fluminense https://orcid.org/0000-0002-6967-2361
José Ribeiro Meirelles Júnior Universidade Estadual do Norte Fluminense

DOI:

https://doi.org/10.14393/BJ-v39n0a2023-67310

Keywords:

Intake, Performance, Ruminants, Statistical analysis.

Abstract

This study aimed to compare the univariate analyses (relationship between dry matter intake (DMI) and average daily gain (ADG), Kleiber ratio, and residual feed intake) and multivariate analysis (bionutritional index [BNI]) to determine feed efficiency. Were used a total of 160 cattle (individual data) and the analyzed variables were dry matter intake, weight gain, and body weight of the animals. We used five methods to evaluate feed efficiency, the BNI, FE, corrected feeding efficiency (corFE), Kleiber ratio (KR), and residual feed intake (RFI). Study 1 demonstrated that only the FE (p=0.0472) was significant, although the FE after the transformation of Box-Cox (corFE) (p=0.0642) showed a statistical trend. In studies 2, 3, and 5, we observed that BNI was the best biological efficiency indicator. In the study 4, we observed that the best indicators were FE (0.110; p=0.0281), corFE (0.380; p=0.0429), and RFI (0.465; p=0.0340) for the genders. However, corFE decreased the coefficient of variation in all studies. In conclusion, the use of the Box-Cox transformation is as efficient as the multivariate analysis in discriminating experimental groups (genetic groups, different levels of concentrate in the diet, and genders) concerning the other univariate analyzes.

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