caa a22 4500 388061278 CHVBK 20180307125121.0 cr unu---uuuuu 161130e199802 xx s 000 0 eng 10.1017/S1357729800009024 doi S1357729800009024 pii (NATIONALLICENCE)cambridge-10.1017/S1357729800009024 Factors associated with average pig weight at weaning on farms using early weaning [Elektronische Daten] The objective of this study was to investigate the effect of various factors on average pig weight at weaning on farms using early weaning. Farms were selected based on average weaning age and whether they recorded lactation food intake and litter weights at weaning. The database contained 9834 litter weights and 8903 food intake records. Average pig weight at weaning, litter size at weaning, weaning age, and average daily food intake during lactation (ADFl) were 4·9 (s.d. 1·0) kg, 9·3 (s.d. 1·6) pigs, 16·8 (s.d. 2·8) days, and 4·9 (s.d. 1·1) kg, respectively. Litter size, weaning age, parity, farrowing season, and ADFl groups influenced average pig weight at weaning (P < 0·01). Three two-way interactions between parity and season, weaning age and farrowing season, and weaning age and ADFl groups were found fP < 0·01). Average pig weights for litter sizes between six and 10 were higher than those between litter sizes one and four, and 11 and 22. Parity 1 sows produced lighter pig weights than any other parity group during any other season (P < 0·01). Average weights of weaned pigs farrowed during the summer in all parities groups were lighter (P < 0·01) than those during the autumn. Pig weights for weaning ages between 22 and 21 days during the summer tended to be lighter than those during the autumn. Pigs weaned between days 16 and 22 of age in the high ADFI group (>5·6 kg) were heavier (P < 0·01) than those in the low ADFl (> 4·2 kg) group. Copyright © British Society of Animal Science 1998 early weaning nationallicence piglets nationallicence sows nationallicence weaning weight nationallicence Koketsu Y. Department of Clinical and Population Sciences, College of Veterinary Medicine, University of Minnesota, St Paul 55108, USA Dial G. D. Department of Clinical and Population Sciences, College of Veterinary Medicine, University of Minnesota, St Paul 55108, USA Animal Science Cambridge University Press 66/1(1998-02), 247-253 1357-7298 66:1<247 1998 66 ASC https://doi.org/10.1017/S1357729800009024 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S1357729800009024 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Koketsu Y. Department of Clinical and Population Sciences, College of Veterinary Medicine, University of Minnesota, St Paul 55108, USA NATIONALLICENCE 700 1- Dial G. D. Department of Clinical and Population Sciences, College of Veterinary Medicine, University of Minnesota, St Paul 55108, USA NATIONALLICENCE 773 0- Animal Science Cambridge University Press 66/1(1998-02), 247-253 1357-7298 66:1<247 1998 66 ASC CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge