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Effects of cysteamine compound on milk production and hormonal responses of lactating cow during heat stress
Z. Shen 1  
,   R. Zhang 1
 
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Laboratory of Animal Physiology and Biochemistry, Nanjing Agricultural University, Nanjing 210095, China
CORRESPONDING AUTHOR
Z. Shen   

Laboratory of Animal Physiology and Biochemistry, Nanjing Agricultural University, Nanjing 210095, China
Publication date: 2004-08-30
 
J. Anim. Feed Sci. 2004;13(Suppl. 1):663–666
 
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ABSTRACT
In heat-stressed cow received cysteamine compound (Lactonin) the rectal temperature decreased (P<0.05), milk yield, fat-corrected milk, milk fat and feed conversion rate (FCR) increased (P<0.05). These changes were companied with trendy (0.05 < P < 0.15) of higher milk protein and lower somatic cell count. Additionally, plasma insulin enhanced (P<0.01) signifi cantly in Lactonin herd (n=49), whereas T3 and T4 tended (0.05 < P < 0.15) to decline. The data show that Lactonin helps heat-stressed cow to maintain a more normal metabolism in hot summer, this positive effect of Lactonin on cow performance was associated with Lactonin-dependent alteration of plasma insulin, T3 and T4.
ISSN:1230-1388