Physiological effects of whole cottonseed in the diet of lactating dairy cows

With 32 lactating Holstein cows we evaluated physiological effects of gossypol and cyclopropenoid fatty acids in diets containing 18.5% whole cottonseed (dry matter) based on corn, corn silage, and soybean meal. All cows consumed a control diet for the first 2 wk of lactation and then were assigned...

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Bibliographic Details
Published in:Journal of dairy science 1985-10, Vol.68 (10), p.2608-2614
Main Authors: Hawkins, G.E, Cummins, K.A, Silverio, M, Jilek, J.J
Format: Article
Language:English
Subjects:
Animal Feed
Animals
BOVIN LAITIER
Cattle - physiology
COTTONSEED
Cottonseed Oil - pharmacology
COWS
DAIRY CATTLE
DIETS
Fatty Acids, Unsaturated - pharmacology
Female
FISIOLOGIA
GANADO DE LECHE
GOSSYPIUM
Gossypol - pharmacology
LACTACION
LACTATION
Lactation - drug effects
LACTATION DURATION
Milk - analysis
PHYSIOLOGIE
PHYSIOLOGY
Pregnancy
SEED
SEMENCE
SEMILLAS
VACA
VACHE
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Summary:With 32 lactating Holstein cows we evaluated physiological effects of gossypol and cyclopropenoid fatty acids in diets containing 18.5% whole cottonseed (dry matter) based on corn, corn silage, and soybean meal. All cows consumed a control diet for the first 2 wk of lactation and then were assigned to either control or whole cottonseed diet for the remainder of their lactation. Milk production, milk fat and protein percentages, and daily dry matter intake were measured. Dry matter intakes were less for cows consuming the whole cottonseed diet, but net energy intake was similar for all diets. Milk fat from cows consuming whole cottonseed contained detectable concentrations of cyclopropene fatty acids. Total lipid in plasma, total serum cholesterol, serum gossypol, and apparent liver gossypol concentrations were greater in cows fed whole cottonseed. Gossypol and cyclopropenoid fatty acids appeared to be absorbed from the gut of cows fed whole cottonseed. Small amounts of gossypol in serum and liver tissue and small amounts of cyclopropene fatty acids in adipose tissue lipids and milk fat indicate a need to elucidate the significance of these physiologically active compounds in the human diet and their biological effects on lactating dairy cows.
ISSN:0022-0302
1525-3198
DOI:10.3168/jds.S0022-0302(85)81144-9