Cinética de fermentação ruminal das silagens de três híbridos de milho comerciais em diferentes estádios de maturação

Pôssas, F. P.; Gonçalves, Lúcio Carlos; Pereira, L.; Machado, F. S.; Jayme, Diogo Gonzaga; Rodrigues, J. A. S.; Rodríguez, N. M.; Tomich, T. R.

doi:10.1590/1678-7066

Cited by 7 publications

(6 citation statements)

References 7 publications

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“…In contrast to present study, Pôssas et al (2015) observed longer lag time for hybrids with hard-textured grains compared to hybrids with semi-hard texture grains. However, when L was higher, gas production of FC fraction increased, suggesting greater fibrolytic microbial activity.…”

Section: Fermentation Kinetics and In Vitro Dry Matter Digestibilitycontrasting

confidence: 99%

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Effects of exogenous amylase on the in vitro digestion kinetics of whole‐crop maize silages made from flint or dent grain type at different phenological stages grown in tropical condition

Silva

Pereira

Pedreira

et al. 2019

Animal Physiology Nutrition

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The effect of exogenous amylase on the in vitro rumen digestion kinetics of wholecrop maize silage made from dent (RB9004) or flint grain type (RB9308) was evaluated at different phenological stages: soft dough (SOD), early dent (EAD), ½ milkline (½M) and ¾ milkline (¾M). Forage was harvested from 70 to 110 days after sowing. Two rumen-cannulated cows receiving or not exogenous amylase (0.7 g/kg dry matter-DM, provided to achieve 396 kilo Novo units of amylase activity/kg of TMR DM) were used as donor of ruminal fluid. The in vitro gas production kinetics was evaluated according to a dual-pool logistic model. The chemical composition and gas production kinetics were affected by the hybrid and phenological stages. The flint hybrid had lower range for chemical analysis among physiological stages. Harvesting at ½M and ¾M improved DM content, bromatological composition and silage quality parameters compared to dent or flint types. Amylase (i) increased methane (CH 4 ) production and in vitro dry matter digestibility (IVDMD) in ½M stage, (ii) improved digestion kinetics by reducing lag time and increasing total gas production and fermentation rates of non-fibrous carbohydrates (NFC) and fibrous carbohydrates (FC), and (iii) increased extent and fermentation rate of NFC and increased fermentation rate of FC fraction in whole-crop maize silages produced from dent or flint types in all phenological stages. Harvesting between ½M and ¾M is the best phenological stage to improve chemical composition and silage quality parameters. Exogenous amylase showed improvements on fibre digestion of silages at ½M and ¾M phenological stages in both grain types of corn. K E Y W O R D S carbohydrates, digestibility, enzyme, harvesting time, methane | 77 SILVA et AL. How to cite this article: Silva AS, Pereira LGR, Pedreira MDS, et al. Effects of exogenous amylase on the in vitro digestion kinetics of whole-crop maize silages made from flint or dent grain type at different phenological stages grown in tropical condition.

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Section: Fermentation Kinetics and In Vitro Dry Matter Digestibilitycontrasting

confidence: 99%

“…However, when L was higher, gas production of FC fraction increased, suggesting greater fibrolytic microbial activity. In contrast to present study, Pôssas et al (2015) observed longer lag time for hybrids with hard-textured grains compared to hybrids with semi-hard texture grains.…”

Section: Fermentation Kinetics and In Vitro Dry Matter Digestibilitycontrasting

confidence: 99%

Effects of exogenous amylase on the in vitro digestion kinetics of whole‐crop maize silages made from flint or dent grain type at different phenological stages grown in tropical condition

Silva

Pereira

Pedreira

et al. 2019

Animal Physiology Nutrition

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“…Although the classification of grain maturity stage of maize based on its hardness is important, differences may exist even within a particular stage. According to Pôssas et al [27], each hybrid advances in protein matrix deposition at a different rate, justifying the differences in the fermentation kinetics observed among the evaluated hybrids. For example, with the Feroz hybrid, the asymptotic gas production did not differ among stages, whereas with the Maximus and Defender hybrids, the highest and lowest values of this parameter were observed at R3 and R5, respectively.…”

Section: Ruminal Fermentationmentioning

confidence: 95%

“…With a more advanced plant maturity, there is an increase in the DM content and the proportion of grain in the harvested biomass. Corn grain vitreousness is increased with maturity and, consequently, starch utilization may be reduced, limiting the amount of substrate available for fermentation and gas production [27]. However, the proportion of grain in total DM is also increased, with a reduction of the proportion of more fibrous parts in the whole-plant.…”

Section: Ruminal Fermentationmentioning

confidence: 99%

Effects of Hybrid and Grain Maturity Stage on the Ruminal Degradation and the Nutritive Value of Maize Forage for Silage

Horst

López

Neumann³

et al. 2020

Agriculture

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The study aimed to examine the effects of harvesting three maize hybrids at different maturity stages on the ruminal fermentation kinetics, fermentation end-products (volatile fatty acid, ammonia and methane) output, and digestibility of maize plant fractions, as well as the degradability of the resulting silage. Three hybrids were compared (Maximus VIP3, Defender VIP and Feroz VIP) harvested at three grain maturity stages (milk (R3), dough (R4) and dent (R5) grain), while silage samples were collected only at the dent grain stage (R5). Grain digestibility tended to decrease as the maturity stage progressed (p < 0.05), while the whole-plant digestibility increased with increasing maturity for the three evaluated hybrids (p < 0.05). The gas production of whole-plant at 24 h of incubation was higher for the Maximus hybrid than for the others (p < 0.05), with average values of 188, 196 and 207 mL g−1 dry matter at stages R3, R4 and R5, respectively. For the in situ ruminal degradation kinetics of silage, instantly degradable dry matter and fiber potential degradability were greater with Maximus maize forage than with the other two hybrids. From the perspective of in vitro results, the Maximus VIP3 hybrid seems to be the most suitable for silage production when harvested between the dough and the dent grain stage of maturity.

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“…Como exemplo de matéria-prima muito utilizada, têm-se o milho híbrido 2B688 PW, devido seu grande valor nutricional e alta produção de matéria seca por hectare, além do baixo custo de produção, colheita simplificada e facilidade de armazenamento, tornando o cultivo do milho uma das melhores opções para o produtor que necessita de armazenamento de alimento para seu rebanho em períodos climáticos instáveis (PÔSSAS et al, 2015).…”

Section: Introductionunclassified

Comportamento De Milho Híbrido Para Silagem Em Diferentes Condições De Sucessão De Culturas No Município De Umuarama-Pr

Farias

Fernandes

Gomes

et al. 2017

ArqVet

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Gesivaldo Alves do Nascimento 7 FARIAS, C. M. Q.; FERNANDES, V.; SANTANA-GOMES, S. M.; IZIDORO JUNIOR, A.; BALDISERA, S. S.; SCHWEN-GBER, R. P.; NASCIMENTO, G. A. Comportamento de milho híbrido para silagem em diferentes condições de sucessão de culturas no município de Umuarama -PR. Arq. Ciênc. Vet. Zool. UNIPAR, Umuarama, v. 19, n. 4, p. 227-230, out./dez. 2016. RESUMO:O objetivo do trabalho foi avaliar o comportamento do milho híbrido para silagem em diferentes condições de sucessão de culturas no município de Umuarama -PR. O experimento foi realizado em duas diferentes áreas da fazenda experimental da Universidade Paranaense -UNIPAR, no referido município. Na área 1 cultivou-se o milho em sucessão à cana--de-açúcar e na área 2, em sucessão à pastagem do gênero Brachiaria. O experimento foi conduzido no período de dezembro/2014 a abril/2015. Utilizou-se o milho híbrido 2B688 PW, cujos tratos culturais foram realizados conforme a necessidade da cultura. Após 78 dias da semeadura, foram amostradas, aleatoriamente, 19 parcelas de 8m² em cada área, onde se avaliou altura de plantas e de inserção de espiga, comprimento e diâmetro de espiga. Não foram verificadas diferenças significativas entre os tratamentos para todas as variáveis analisadas, evidenciando que a cultura do milho apresentou as mesmas respostas quando cultivada em sucessão à cana ou à pastagem de Brachiaria. PALAVRAS-CHAVE: Brachiaria. Cana-de-açúcar. Noroeste do Paraná. Pastagem. HYBRID MAIZE FOR SILAGE IN DIFFERENT CROP SUCCESSION CONDITIONS IN THE CITY OF UMUARAMA-PRABSTRACT: The purpose of this study was to evaluate the behavior of hybrid maize for silage in different crop succession conditions in the city of Umuarama -PR in two different areas. The experiment was performed at the experimental farm at Universidade Paranaense -UNIPAR in the aforementioned city. In area 1, maize was grown after sugarcane, while in area 2 it was grown after pasture with Brachiaria. The experiment was carried out from December/2014 to April/2015. Hybrid maize 2B688 PW was used, with cultural traits performed according to the crop needs. Seventy-eight days after sowing, 19 plots measuring 8 m 2 each were randomly chosen and analyzed, assessing plant height and spike insertion, as well as length and spike diameter. There were no significant differences between treatments for all variables analyzed, therefore, it can be concluded that maize crop presented the same responses when grown in succession to sugarcane or to Brachiaria pasture. KEYWORDS: Brachiaria. Northwestern Paraná. Pasture. Sugarcane. COMPORTAMIENTO DE MAÍZ HÍBRIDO PARA ENSILAJE EN DIFERENTES CONDICIONES DE SUCESIÓN DE CULTIVOS EN EL MUNICIPIO UMUARAMA-PRRESUMEN: El objetivo de este estudio ha sido evaluar el comportamiento del maíz híbrido para ensilaje en diferentes condiciones de sucesión de culturas en la ciudad de Umuarama -PR. El experimento se llevó a cabo en dos áreas diferentes de la granja experimental de la Universidad Paranaense -Unipar, en el referido municipio. En el área 1 se ha cultivado ...

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Cinética de fermentação ruminal das silagens de três híbridos de milho comerciais em diferentes estádios de maturação

Cited by 7 publications

References 7 publications

Effects of exogenous amylase on the in vitro digestion kinetics of whole‐crop maize silages made from flint or dent grain type at different phenological stages grown in tropical condition

Effects of exogenous amylase on the in vitro digestion kinetics of whole‐crop maize silages made from flint or dent grain type at different phenological stages grown in tropical condition

Effects of Hybrid and Grain Maturity Stage on the Ruminal Degradation and the Nutritive Value of Maize Forage for Silage

Comportamento De Milho Híbrido Para Silagem Em Diferentes Condições De Sucessão De Culturas No Município De Umuarama-Pr

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