7L.J.Johnstion M.Ellis ect.Effect of Room Temperature and Dietary Animal Acid Concentration on Performance of Lactating Sows.Anim.Sci.,1999,77:1 638-1 644
8N.Quninou,J.Noblet.Influence of High Anibient Temperature on performance of Multiparous Lactating Sows.Anim.sci.,1999,77:2 124-2 134
9B lecha F,Kelley KW.Effects of cold and weaning stressors on the antibodymidiated immune response of pigs.Anim Sci,1981,53:439
10Kelley KW,et al.Cold exposure and absorption of colostral immunoglobulins by neonatal pigs.Anim Sci,1982,55 (2):363 -368