| Registro completo |
| Provedor de dados: |
Scientia Agricola
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| País: |
Brazil
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| Título: |
Effect of ensiling time on apparent total tract starch digestibility in Southern Brazilian dairy herds
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| Autores: |
Michelotti,Tainara Cristina de Abreu
Silva,Ricardo Antonio da
Carneiro,Jorge Henrique
Navarro,Rodrigo Barros
Carvalho,Igor Quirrenbach de
Paula,Eduardo Marostegan de
Ferraretto,Luiz Felipe
Caetano,Mariana
Lanna,Dante Pazzanese Duarte
Almeida,Rodrigo de
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| Data: |
2021-01-01
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| Ano: |
2021
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| Palavras-chave: |
Ensiling period
Fecal starch
Whole-plant corn silage
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| Resumo: |
ABSTRACT: Ensiling corn for longer periods is a strategy used to increase rumen bacteria access to starch. In fact, when corn is ensiled for insufficient periods, starch digestibility decreases, as evidenced by excreted starch. This study investigates the effects of corn silage ensiling time on starch digestibility of dairy cows through fecal starch analysis. The trial was conducted during the spring of 2013 and the fall of 2014 on twenty dairy herds located in the state of Paraná, southern Brazil. Total mixed ration (TMR), whole-plant corn silage (WPCS) and fecal samples were collected for determination of dry matter (DM), neutral detergent fiber (NDF), acid detergent fiber (ADF), lignin and starch. Apparent total tract starch digestibility (ATTSD) was calculated using equations developed by Fredin et al. (2014) and Bal et al. (1997). Data were analyzed using the CORR, REG and GLM procedures of SAS. Spring and fall WPCS were ensiled for 260 and 132 days, respectively (p < 0.01). There was no difference (p > 0.05) in ATTSD-Fredin from season to season though there was a trend (p = 0.11) towards greater ATTSD-Bal for spring samples. ATTSD-Bal was positively correlated with ensiling days (r = 0.31). Starch digestibility was not negatively affected by WPCS harvesting maturity. Differences in post-ruminal starch digestion, variation between farms in DM intake and diets, limitations of the equations, influence of uncontrolled factors, and the small number of experimental units might have contributed to the absence of significant results. Overall, Bal et al. (1997) equation was more efficient in distinguishing ATTSD from different ensiling periods.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000200401
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| Editor: |
São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
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| Relação: |
10.1590/1678-992x-2019-0096
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| Formato: |
text/html
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| Fonte: |
Scientia Agricola v.78 n.2 2021
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| Direitos: |
info:eu-repo/semantics/openAccess
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