| Автор | St C. Neal, Heather D. |
| Автор | France, J. |
| Автор | Orr, R. J. |
| Автор | Treacher, T. T. |
| Дата выпуска | 1985 |
| dc.description | ABSTRACTA model is described, which maximizes hay intake in the formulation of rations for pregnant ewes in the last 6 weeks of pregnancy. A regression of hay intake upon hay digestibility, concentrate level, ewe live weight, number of foetuses carried and week of pregnancy, derived from an experiment on individually-recorded ewes, is used as the intake constraint in a linear programme. This is solved in an interactive program which can be implemented on several makes of microcomputer. The intakes of hay predicted by the model are lower than those reported elsewhere, reflecting the more accurately recorded intakes of the original experiment compared with most other published data. The rations formulated by the model show that in weeks 16 to 18 of pregnancy hay could provide most of the ewes' requirements and especially when hays of high metabolizable energy concentration are used. The ease of changing the values of the inputs and the speed of the ration formation enable any number of rations to be formulated quickly for a range of hays and individual conditions. |
| Формат | application.pdf |
| Издатель | Cambridge University Press |
| Копирайт | Copyright © British Society of Animal Science 1985 |
| Название | A model to maximize hay intake when formulating rations for pregnant ewes |
| Тип | research-article |
| DOI | 10.1017/S0003356100031883 |
| Print ISSN | 0003-3561 |
| Журнал | Animal Production |
| Том | 40 |
| Первая страница | 93 |
| Последняя страница | 100 |
| Аффилиация | St C. Neal Heather D.; Grassland Research Institute, Hurley, Maidenhead, Berkshire SL6 5LR |
| Аффилиация | France J.; Grassland Research Institute, Hurley, Maidenhead, Berkshire SL6 5LR |
| Аффилиация | Orr R. J.; Grassland Research Institute, Hurley, Maidenhead, Berkshire SL6 5LR |
| Аффилиация | Treacher T. T.; Grassland Research Institute, Hurley, Maidenhead, Berkshire SL6 5LR |
| Выпуск | 1 |
