Intestinal nitrogen degradation of hay and grass silage estimated by the mobile bag technique
Four ruminal and duodenally cannulated heifers about 550 kg were used to study the intestinal N degradation of hay and grass silage. The animals were fed at maintenance hay or grass silage, without or with barley (0.70 X DM intake) in a 2 X 2 factorial design in 4 X 4 Latin square with periods of 21...
| Autores principales: | , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
1991
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/29949 |
| _version_ | 1855535951116238848 |
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| author | Varvikko, T. Vanhatalo, A. |
| author_browse | Vanhatalo, A. Varvikko, T. |
| author_facet | Varvikko, T. Vanhatalo, A. |
| author_sort | Varvikko, T. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Four ruminal and duodenally cannulated heifers about 550 kg were used to study the intestinal N degradation of hay and grass silage. The animals were fed at maintenance hay or grass silage, without or with barley (0.70 X DM intake) in a 2 X 2 factorial design in 4 X 4 Latin square with periods of 21 days. Intestinal degradation was measured by the mobile bag method, containing 800 mg of hay or freeze-dried grass silage or their rumen-incubated residues. 31.0-38.4 percent of original hay and grass silage dry matter (DM), and 9.6-13.7 percent of DM of their rumen-incubated residues disappeared from the bags during the intestinal exposure. Except for bound nitrogen in acid detergent fibre (ADF-N) the N disappearance values (53.4-83.1 percent) were high compared to respective DM values. The disappearance of DM, organic matter (OM), neutral detergent fibre N (NDF-N) and ADF-N, but not total N or amino acid N (AA-N) was different (P 0.05) between hay and grass silage. Except for NDF-N, the intestinal degradation of these variates was altered (P 0.05), usually reduced, by the pre-incubation in the rumen, but not by the barley supplementation of the diets. Microbial nitrogen attached to the rumen-incubated roughages disturbed the intestinal N degradation measurements. Markedly greater NDF-N disappearance compared to DM, however, indicated a high N decomposing capacity in the ruminant intestine. It was concluded that the mobile bag technique is a suitable tool in comparing the relative intestinal N degradability among similar type of feeds. |
| format | Journal Article |
| id | CGSpace29949 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1991 |
| publishDateRange | 1991 |
| publishDateSort | 1991 |
| record_format | dspace |
| spelling | CGSpace299492022-01-29T16:17:31Z Intestinal nitrogen degradation of hay and grass silage estimated by the mobile bag technique Varvikko, T. Vanhatalo, A. protein degradation rumen hay estimation silage Four ruminal and duodenally cannulated heifers about 550 kg were used to study the intestinal N degradation of hay and grass silage. The animals were fed at maintenance hay or grass silage, without or with barley (0.70 X DM intake) in a 2 X 2 factorial design in 4 X 4 Latin square with periods of 21 days. Intestinal degradation was measured by the mobile bag method, containing 800 mg of hay or freeze-dried grass silage or their rumen-incubated residues. 31.0-38.4 percent of original hay and grass silage dry matter (DM), and 9.6-13.7 percent of DM of their rumen-incubated residues disappeared from the bags during the intestinal exposure. Except for bound nitrogen in acid detergent fibre (ADF-N) the N disappearance values (53.4-83.1 percent) were high compared to respective DM values. The disappearance of DM, organic matter (OM), neutral detergent fibre N (NDF-N) and ADF-N, but not total N or amino acid N (AA-N) was different (P 0.05) between hay and grass silage. Except for NDF-N, the intestinal degradation of these variates was altered (P 0.05), usually reduced, by the pre-incubation in the rumen, but not by the barley supplementation of the diets. Microbial nitrogen attached to the rumen-incubated roughages disturbed the intestinal N degradation measurements. Markedly greater NDF-N disappearance compared to DM, however, indicated a high N decomposing capacity in the ruminant intestine. It was concluded that the mobile bag technique is a suitable tool in comparing the relative intestinal N degradability among similar type of feeds. 1991 2013-06-11T09:25:33Z 2013-06-11T09:25:33Z Journal Article https://hdl.handle.net/10568/29949 en Limited Access World Review of Animal Production;26(1):73-76 |
| spellingShingle | protein degradation rumen hay estimation silage Varvikko, T. Vanhatalo, A. Intestinal nitrogen degradation of hay and grass silage estimated by the mobile bag technique |
| title | Intestinal nitrogen degradation of hay and grass silage estimated by the mobile bag technique |
| title_full | Intestinal nitrogen degradation of hay and grass silage estimated by the mobile bag technique |
| title_fullStr | Intestinal nitrogen degradation of hay and grass silage estimated by the mobile bag technique |
| title_full_unstemmed | Intestinal nitrogen degradation of hay and grass silage estimated by the mobile bag technique |
| title_short | Intestinal nitrogen degradation of hay and grass silage estimated by the mobile bag technique |
| title_sort | intestinal nitrogen degradation of hay and grass silage estimated by the mobile bag technique |
| topic | protein degradation rumen hay estimation silage |
| url | https://hdl.handle.net/10568/29949 |
| work_keys_str_mv | AT varvikkot intestinalnitrogendegradationofhayandgrasssilageestimatedbythemobilebagtechnique AT vanhataloa intestinalnitrogendegradationofhayandgrasssilageestimatedbythemobilebagtechnique |