caa a22 4500 386321205 CHVBK 20180307111627.0 cr unu---uuuuu 161130e198804 xx s 000 0 eng 10.1017/S0003356100042343 doi S0003356100042343 pii (NATIONALLICENCE)cambridge-10.1017/S0003356100042343 Influence of manure gases on the onset of puberty of replacement gilts [Elektronische Daten] To determine whether gases generated during the breakdown of accumulated manure in an environmentally regulated building affects the onset of puberty in gilts, 42 crossbred gilts, born from 1 o t 15 September 1985, were reared indoors from 10 to 30 weeks of age on concrete slats over a pit that was drained and refilled with clean water biweekly (clean group). Forty-two gilts were reared over a pit where manure was allowed to accumulate (control group). These two groups had similar feeding, water, floor space, lighting and room temperature. A third group of 42 crossbred gilts was reared from 10 to 30 weeks of age in an open-front building with a concrete apron (outdoor group). Concentration of aerial ammonia in the control environment was three- to five-fold higher than in either the clean or the outdoor environment (P < 0·001). Average daily gain and food conversion efficiency were similar for the two indoor treatment groups, but the outdoor group gained less weight than either indoor group (P < 0·05). At 26 weeks of age all gilts were exposed to mature boars daily for 2 weeks, then every 2nd day for an additional 2 weeks. A greater proportion of gilts in the clean environment attained puberty 7 days (P < 0·05) and 10 days (P < 0·07) after first exposure to boars. These data suggest that odorous gases, such as ammonia, in the air of environmentally regulated buildings may diminish the stimulatory influence of boars on the onset of puberty in gilts. Copyright © British Society of Animal Science 1988 Malayer J. R. Department of Animal Sciences, Purdue University, West Lafayette, Indiana 47907, USA Brandt K. E. Department of Animal Sciences, Purdue University, West Lafayette, Indiana 47907, USA Green M. L. Department of Animal Sciences, Purdue University, West Lafayette, Indiana 47907, USA Kelly D. T. Department of Animal Sciences, Purdue University, West Lafayette, Indiana 47907, USA Sutton A. L. Department of Animal Sciences, Purdue University, West Lafayette, Indiana 47907, USA Diekman M. A. Department of Animal Sciences, Purdue University, West Lafayette, Indiana 47907, USA Animal Production Cambridge University Press 46/2(1988-04), 277-282 0003-3561 46:2<277 1988 46 ASC https://doi.org/10.1017/S0003356100042343 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0003356100042343 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Malayer J. R. Department of Animal Sciences, Purdue University, West Lafayette, Indiana 47907, USA NATIONALLICENCE 700 1- Brandt K. E. Department of Animal Sciences, Purdue University, West Lafayette, Indiana 47907, USA NATIONALLICENCE 700 1- Green M. L. Department of Animal Sciences, Purdue University, West Lafayette, Indiana 47907, USA NATIONALLICENCE 700 1- Kelly D. T. Department of Animal Sciences, Purdue University, West Lafayette, Indiana 47907, USA NATIONALLICENCE 700 1- Sutton A. L. Department of Animal Sciences, Purdue University, West Lafayette, Indiana 47907, USA NATIONALLICENCE 700 1- Diekman M. A. Department of Animal Sciences, Purdue University, West Lafayette, Indiana 47907, USA NATIONALLICENCE 773 0- Animal Production Cambridge University Press 46/2(1988-04), 277-282 0003-3561 46:2<277 1988 46 ASC CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge