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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Productive performance and ingestive behavior of crossbred heifers in integrated livestock-forest systems

Full text
Author(s):
Juliana Mara de Freitas Santos [1] ; Cristiana Andrighetto [2] ; Gustavo Pavan Mateus [3] ; Gelci Carlos Lupatini [4] ; Murilo Scalet Daldon [5] ; Larissa Pereira de Lima [6] ; Patrícia Aparecida da Luz [7] ; Hornblenda Joaquina Silva Bello [8]
Total Authors: 8
Affiliation:
[1] Universidade Estadual Paulista. Faculdade de Ciências Agrárias e Tecnológicas - Brasil
[2] Universidade Estadual Paulista. Faculdade de Ciências Agrárias e Tecnológicas - Brasil
[3] Agência Paulista de Tecnologia dos Agronegócios - Brasil
[4] Universidade Estadual Paulista. Faculdade de Ciências Agrárias e Tecnológicas - Brasil
[5] Universidade Estadual Paulista. Faculdade de Ciências Agrárias e Tecnológicas - Brasil
[6] Universidade Estadual Paulista. Faculdade de Ciências Agrárias e Tecnológicas - Brasil
[7] Universidade Estadual Paulista. Faculdade de Ciências Agrárias e Tecnológicas - Brasil
[8] Universidade Estadual Paulista. Faculdade de Ciências Agrárias e Tecnológicas - Brasil
Total Affiliations: 8
Document type: Journal article
Source: REVISTA BRASILEIRA DE ZOOTECNIA-BRAZILIAN JOURNAL OF ANIMAL SCIENCE; v. 51, 2022-03-11.
Abstract

ABSTRACT The present study aimed to assess the productive performance, ingestive behavior, and thermal condition of crossbred beef heifers in an integrated livestock-forest (ILF) system with different tree-planting designs. Seventy-two ½ Angus ½ Nellore heifers were divided in three treatments—conventional system (CS) without eucalyptus, integrated livestock system with 187 eucalyptus ha−1 (ILF-1L), and integrated livestock system with 446 eucalyptus ha−1 (ILF-3L)—, in the winter and summer. Total dry mass of forage (TDM), chemical analysis of Marandu palisadegrass, average daily gain (ADG), stocking rate (SR), weight gain per area (WGA), behavior, microclimatic variables, and thermal comfort indexes were evaluated. A higher percentage of crude protein and lower TDM and SR were observed in ILF-1L and ILF-3L, with no differences for ADG and WGA. Ambient temperature, temperature-humidity index, black globe-humidity index, and radiant heat load were better in ILF-1L and ILF-3L. Heifers in ILF-1L and ILF-3L carried out grazing, resting, rumination, and other activities in the shade. In the summer, heifers in ILF-1L and ILF-3L spent less time resting and more time in rumination and performing other activities than those in the CS. In conclusion, the better forage quality in ILF-1L and ILF-3L does not alter the performance of heifers or WGA, despite the decreased TDM and SR. Furthermore, ILF-1L and ILF-3L provide better thermal comfort, and heifers that do not have access to shade decrease their activities as a strategy to reduce the use of energy for thermal regulation process. (AU)

FAPESP's process: 16/25385-0 - Production and behavior of Angus-Nellore heifers in integrated agricultural production systems
Grantee:Juliana Mara de Freitas Santos
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 19/20039-5 - Hematological, biochemical and hormonal parameters for the evaluation of the heat stress of the heifers in integrated livestock forest systems
Grantee:Cristiana Andrighetto
Support Opportunities: Regular Research Grants
FAPESP's process: 17/05944-8 - Production of Angus-Nellore heifers in integrated crop-livestock systems
Grantee:Cristiana Andrighetto
Support Opportunities: Regular Research Grants