2Mader T L,Johnson L J,Gaughan J B.A comprehensive index for assessing environmental stress in animals[J].Journal of Animal Science,2010(88):2153-2165.
3Vranken E,Claes S,Hendriks J,et al.Intermittent measurements to determine ammonia emissions from livestock buildings[J].Biosystems Engineering,2004(88):351-358.
4Hristov A N,Hanigan M,Cole A,et al.Review:Ammonia emissions from dairy farms and beef feedlots[J].Canadian Journal of Animal Science,2011(91):1-35.
5Ribikauskas V,Vaicionis G.Evaluation of the microclimate in the beef cattle barns[J].Gyvulininkyste,2004(44):63-75.
6Demmers T G M,Phillips VR,Short L S,et al.Validation of ventilation rate measurement methods and ammonia emission from naturally ventilated dairy and beef buildings in the United Kingdom[J].Journal of Agricultural Engineering Research,2001,79(l):107-116.
7Tucker C B,Rogers A R,Verkerk G A,et al.Effects of shelter and body condition on the behaviour and physiology of dairy cattle in winter[J].Applied Animal Behaviour Science,2006,105(1):1-13.
8Arias R A,Mader T L.Environmental factors affecting daily water intake on cattle finished in feedlots[J].Journal of Animal Science,2011(89):245-251.
9Kroodsma W,VeldJ W H,Scholtens R,et al.Ammonia emission and its reduction from cubicle houses by flushing[J].Livestock Production Science,1993,5:293-302.
10Braam C R,Smits M C J,Gunnink H,et al.Ammonia emission from a double-sloped solid floor in a cubicle house for dairy cows[J].Journal of Agricultural Engineering Research,1997,68 (4):375-386.
