Modelling beef cattle production systems from the Pampas in Brazil to assess intensification options
Autor(a) principal: | |
---|---|
Data de Publicação: | 2020 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Scientia Agrícola (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000400502 |
Resumo: | ABSTRACT Traditional livestock productivity is hard to estimate, since it depends on a gamut of animal production indicators that are difficult to measure for many farms. Thus, we propose an analytical method for estimating productivity and understanding the importance of animal production indicators under different full-cycle cattle production systems in Brazil. To evaluate the impact of these indicators, equations were derived from a comutational model of herd evolution for estimating the output parameters of the system as follows: productivity per hectare (PH) and offtake rate (COR), as a function of the indicators; calving rate (CR), mating age (AM), age of slaughter (AS) and stocking rate (SR). For this analysis, twenty-seven scenarios (simulation data) of low to high productivity were used, resulting from the combination of the following factors and levels: 1) calving rate of 50, 65 and 80 %; 2) mating age of heifers of one, two and three, years of age; and 3) age at slaughter of one, two and three year old steers. The scenario with the highest impact for each parameter and the indicator of highest impact for each scenario were identified for the production conditions in the region. Under most scenarios, a reduction in mating age had a greater impact on the productivity indexes compared to a reduction in slaughter age. Appropriate management of available technologies enables farmers to compare the marginal impacts of specific indicators on full-cycle production systems for beef cattle. |
id |
USP-18_103bb438beb31737403fba20ce9a73bf |
---|---|
oai_identifier_str |
oai:scielo:S0103-90162020000400502 |
network_acronym_str |
USP-18 |
network_name_str |
Scientia Agrícola (Online) |
repository_id_str |
|
spelling |
Modelling beef cattle production systems from the Pampas in Brazil to assess intensification optionsadoption of technologyanimal productionmanagementstocking rateABSTRACT Traditional livestock productivity is hard to estimate, since it depends on a gamut of animal production indicators that are difficult to measure for many farms. Thus, we propose an analytical method for estimating productivity and understanding the importance of animal production indicators under different full-cycle cattle production systems in Brazil. To evaluate the impact of these indicators, equations were derived from a comutational model of herd evolution for estimating the output parameters of the system as follows: productivity per hectare (PH) and offtake rate (COR), as a function of the indicators; calving rate (CR), mating age (AM), age of slaughter (AS) and stocking rate (SR). For this analysis, twenty-seven scenarios (simulation data) of low to high productivity were used, resulting from the combination of the following factors and levels: 1) calving rate of 50, 65 and 80 %; 2) mating age of heifers of one, two and three, years of age; and 3) age at slaughter of one, two and three year old steers. The scenario with the highest impact for each parameter and the indicator of highest impact for each scenario were identified for the production conditions in the region. Under most scenarios, a reduction in mating age had a greater impact on the productivity indexes compared to a reduction in slaughter age. Appropriate management of available technologies enables farmers to compare the marginal impacts of specific indicators on full-cycle production systems for beef cattle.Escola Superior de Agricultura "Luiz de Queiroz"2020-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000400502Scientia Agricola v.77 n.4 2020reponame:Scientia Agrícola (Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/1678-992x-2018-0263info:eu-repo/semantics/openAccessLampert,Vinícius do NascimentoCanozzi,Maria Eugênia AndrighettoMcManus,Concepta MargaretDill,Matheus DheinOliveira,Tamara Esteves deMercio,Thomaz ZaraTeixeira,Odilene de SouzaBarcellos,Júlio Otávio Jardimeng2019-10-30T00:00:00Zoai:scielo:S0103-90162020000400502Revistahttp://revistas.usp.br/sa/indexPUBhttps://old.scielo.br/oai/scielo-oai.phpscientia@usp.br||alleoni@usp.br1678-992X0103-9016opendoar:2019-10-30T00:00Scientia Agrícola (Online) - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Modelling beef cattle production systems from the Pampas in Brazil to assess intensification options |
title |
Modelling beef cattle production systems from the Pampas in Brazil to assess intensification options |
spellingShingle |
Modelling beef cattle production systems from the Pampas in Brazil to assess intensification options Lampert,Vinícius do Nascimento adoption of technology animal production management stocking rate |
title_short |
Modelling beef cattle production systems from the Pampas in Brazil to assess intensification options |
title_full |
Modelling beef cattle production systems from the Pampas in Brazil to assess intensification options |
title_fullStr |
Modelling beef cattle production systems from the Pampas in Brazil to assess intensification options |
title_full_unstemmed |
Modelling beef cattle production systems from the Pampas in Brazil to assess intensification options |
title_sort |
Modelling beef cattle production systems from the Pampas in Brazil to assess intensification options |
author |
Lampert,Vinícius do Nascimento |
author_facet |
Lampert,Vinícius do Nascimento Canozzi,Maria Eugênia Andrighetto McManus,Concepta Margaret Dill,Matheus Dhein Oliveira,Tamara Esteves de Mercio,Thomaz Zara Teixeira,Odilene de Souza Barcellos,Júlio Otávio Jardim |
author_role |
author |
author2 |
Canozzi,Maria Eugênia Andrighetto McManus,Concepta Margaret Dill,Matheus Dhein Oliveira,Tamara Esteves de Mercio,Thomaz Zara Teixeira,Odilene de Souza Barcellos,Júlio Otávio Jardim |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Lampert,Vinícius do Nascimento Canozzi,Maria Eugênia Andrighetto McManus,Concepta Margaret Dill,Matheus Dhein Oliveira,Tamara Esteves de Mercio,Thomaz Zara Teixeira,Odilene de Souza Barcellos,Júlio Otávio Jardim |
dc.subject.por.fl_str_mv |
adoption of technology animal production management stocking rate |
topic |
adoption of technology animal production management stocking rate |
description |
ABSTRACT Traditional livestock productivity is hard to estimate, since it depends on a gamut of animal production indicators that are difficult to measure for many farms. Thus, we propose an analytical method for estimating productivity and understanding the importance of animal production indicators under different full-cycle cattle production systems in Brazil. To evaluate the impact of these indicators, equations were derived from a comutational model of herd evolution for estimating the output parameters of the system as follows: productivity per hectare (PH) and offtake rate (COR), as a function of the indicators; calving rate (CR), mating age (AM), age of slaughter (AS) and stocking rate (SR). For this analysis, twenty-seven scenarios (simulation data) of low to high productivity were used, resulting from the combination of the following factors and levels: 1) calving rate of 50, 65 and 80 %; 2) mating age of heifers of one, two and three, years of age; and 3) age at slaughter of one, two and three year old steers. The scenario with the highest impact for each parameter and the indicator of highest impact for each scenario were identified for the production conditions in the region. Under most scenarios, a reduction in mating age had a greater impact on the productivity indexes compared to a reduction in slaughter age. Appropriate management of available technologies enables farmers to compare the marginal impacts of specific indicators on full-cycle production systems for beef cattle. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000400502 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000400502 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1678-992x-2018-0263 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Escola Superior de Agricultura "Luiz de Queiroz" |
publisher.none.fl_str_mv |
Escola Superior de Agricultura "Luiz de Queiroz" |
dc.source.none.fl_str_mv |
Scientia Agricola v.77 n.4 2020 reponame:Scientia Agrícola (Online) instname:Universidade de São Paulo (USP) instacron:USP |
instname_str |
Universidade de São Paulo (USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Scientia Agrícola (Online) |
collection |
Scientia Agrícola (Online) |
repository.name.fl_str_mv |
Scientia Agrícola (Online) - Universidade de São Paulo (USP) |
repository.mail.fl_str_mv |
scientia@usp.br||alleoni@usp.br |
_version_ |
1748936465253924864 |