T echnical N ote : Application of models to estimate daily heat production of lactating sows
| Autor: | Mónica Gandarillas, W. A. Peralta, Allan P Schinckel, F. A. Cabezon, B. T. Richert |
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| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Litter (animal) 0402 animal and dairy science Technical note 04 agricultural and veterinary sciences 040201 dairy & animal science 03 medical and health sciences 030104 developmental biology medicine.anatomical_structure Animal science Lactation medicine Animal Science and Zoology medicine.symptom Parity (mathematics) Weight gain Food Science Mathematics |
| Zdroj: | The Professional Animal Scientist. 33:357-362 |
| ISSN: | 1080-7446 |
| Popis: | The objectives of this research were to use currently available models of nutrient requirements to estimate heat production of lactating sows and to characterize potential sources of variation. Heat production was estimated using NRC (2012) . Sow BW, mean daily litter weight gain ( Cabezon et al., 2016a ), and daily feed intake data ( Cabezon et al., 2016b ) from 317 sows of 2 genetic lines (164 and 153 sows) were used to predict the heat production (watts) for each day of lactation. Data were sorted in 4 parity groups: parity 1 (n = 80, P1), parity 2 (n = 57, P2), parities 3 to 5 (n = 142, P3–5), and parity 6 and greater sows (n = 38, P6+). No genetic line differences were observed for the predicted daily heat production (PDHP). The PDHP were 459, 507, 541, and 555 W for P1, P2, P3–5, and P6+ sows, respectively. Parity 1 sows had less PDHP than sows with greater parities (P |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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