Effect of the ensiling time of hydrated ground corn on silage composition and in situ starch degradability
The aim of this study was to evaluate the effect of time of ensiling on chemical composition and in situ degradability of starch of hydrated ground corn (HGC) with medium grain vitreousness. Corn grains harvested at 83% of dry matter (DM) and vitreosity content of 67% ± 3, were dried to 87% DM. Grai...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Universidade de São Paulo
2016-04-01
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| Series: | Brazilian Journal of Veterinary Research and Animal Science |
| Subjects: | |
| Online Access: | http://www.revistas.usp.br/bjvras/article/view/97794 |
| _version_ | 1818499249357193216 |
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| author | Marcos André Arcari Cristian Marlon de Magalhães Rodrigues Martins Tiago Tomazi Marcos Veiga dos Santos |
| author_facet | Marcos André Arcari Cristian Marlon de Magalhães Rodrigues Martins Tiago Tomazi Marcos Veiga dos Santos |
| author_sort | Marcos André Arcari |
| collection | DOAJ |
| description | The aim of this study was to evaluate the effect of time of ensiling on chemical composition and in situ degradability of starch of hydrated ground corn (HGC) with medium grain vitreousness. Corn grains harvested at 83% of dry matter (DM) and vitreosity content of 67% ± 3, were dried to 87% DM. Grains were milled into a device with 2 mm sieve, reconstituted to reach 67% DM, and ensiled (density of 880 Kg/m³) for up to 330 days. One HGC sample was collected monthly for in situ determination of composition, fermentation end products and for corn starch degradability. Ensiling time did not affect the DM and crude protein (CP) content of the HGC. However, starch concentration was reduced by 2.4 percentage points at 330 days compared to 3 days of ensiling. Increased concentrations of NH3-N (8.5 times), lactic acid (3.45 times), acetic acid (4.1 times), propionic acid (1.7 times), butyric acid (2.8 times) and alcohol (2.4 times) were observed during the ensiling period. The rapidly degradable fraction (fraction A) and the rate of degradation of the slowly degradable fraction (fraction C) of HGC starch were increased 3.51 and 2.21 times, respectively, during the ensiling period. Conversely, the slowly degradable fraction (fraction B) of the HGC starch was decreased 1.93 times during the ensiling period. The effective degradability of the starch of HGC increased for passage rates by 0.02/h (79.9% vs. 94.5%); 0.05/h (65.9% vs 90.01%) and 0.08/h (56.98 vs. 86.52%) when it was evaluated at 3 vs 330 days of ensiling, respectively. In conclusion, ensiling time affected the chemical composition and increases rumen starch degradability of HGC with medium vitreousness of the grain endosperm. |
| first_indexed | 2024-12-10T20:26:51Z |
| format | Article |
| id | doaj.art-56afa181d96c40418c608814476ba63c |
| institution | Directory Open Access Journal |
| issn | 1413-9596 1678-4456 |
| language | English |
| last_indexed | 2024-12-10T20:26:51Z |
| publishDate | 2016-04-01 |
| publisher | Universidade de São Paulo |
| record_format | Article |
| series | Brazilian Journal of Veterinary Research and Animal Science |
| spelling | doaj.art-56afa181d96c40418c608814476ba63c2022-12-22T01:34:49ZengUniversidade de São PauloBrazilian Journal of Veterinary Research and Animal Science1413-95961678-44562016-04-0153110.11606/issn.1678-4456.v53i1p60-7199472Effect of the ensiling time of hydrated ground corn on silage composition and in situ starch degradabilityMarcos André Arcari0Cristian Marlon de Magalhães Rodrigues Martins1Tiago Tomazi2Marcos Veiga dos Santos3Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Nutrição e Produção AnimalUniversidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Nutrição e Produção AnimalUniversidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Nutrição e Produção AnimalUniversidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Nutrição e Produção AnimalThe aim of this study was to evaluate the effect of time of ensiling on chemical composition and in situ degradability of starch of hydrated ground corn (HGC) with medium grain vitreousness. Corn grains harvested at 83% of dry matter (DM) and vitreosity content of 67% ± 3, were dried to 87% DM. Grains were milled into a device with 2 mm sieve, reconstituted to reach 67% DM, and ensiled (density of 880 Kg/m³) for up to 330 days. One HGC sample was collected monthly for in situ determination of composition, fermentation end products and for corn starch degradability. Ensiling time did not affect the DM and crude protein (CP) content of the HGC. However, starch concentration was reduced by 2.4 percentage points at 330 days compared to 3 days of ensiling. Increased concentrations of NH3-N (8.5 times), lactic acid (3.45 times), acetic acid (4.1 times), propionic acid (1.7 times), butyric acid (2.8 times) and alcohol (2.4 times) were observed during the ensiling period. The rapidly degradable fraction (fraction A) and the rate of degradation of the slowly degradable fraction (fraction C) of HGC starch were increased 3.51 and 2.21 times, respectively, during the ensiling period. Conversely, the slowly degradable fraction (fraction B) of the HGC starch was decreased 1.93 times during the ensiling period. The effective degradability of the starch of HGC increased for passage rates by 0.02/h (79.9% vs. 94.5%); 0.05/h (65.9% vs 90.01%) and 0.08/h (56.98 vs. 86.52%) when it was evaluated at 3 vs 330 days of ensiling, respectively. In conclusion, ensiling time affected the chemical composition and increases rumen starch degradability of HGC with medium vitreousness of the grain endosperm.http://www.revistas.usp.br/bjvras/article/view/97794CornStarch degradabilityEnsiling timeChemical composition |
| spellingShingle | Marcos André Arcari Cristian Marlon de Magalhães Rodrigues Martins Tiago Tomazi Marcos Veiga dos Santos Effect of the ensiling time of hydrated ground corn on silage composition and in situ starch degradability Brazilian Journal of Veterinary Research and Animal Science Corn Starch degradability Ensiling time Chemical composition |
| title | Effect of the ensiling time of hydrated ground corn on silage composition and in situ starch degradability |
| title_full | Effect of the ensiling time of hydrated ground corn on silage composition and in situ starch degradability |
| title_fullStr | Effect of the ensiling time of hydrated ground corn on silage composition and in situ starch degradability |
| title_full_unstemmed | Effect of the ensiling time of hydrated ground corn on silage composition and in situ starch degradability |
| title_short | Effect of the ensiling time of hydrated ground corn on silage composition and in situ starch degradability |
| title_sort | effect of the ensiling time of hydrated ground corn on silage composition and in situ starch degradability |
| topic | Corn Starch degradability Ensiling time Chemical composition |
| url | http://www.revistas.usp.br/bjvras/article/view/97794 |
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