Iron sulfate and feed pelleting to detoxify free gossypol in cottonseed diets for dairy cattle

Thirty-two lactating cows were fed ad libitum diets with 1) 18.7% soybean meal, 2) diet 1 plus 500 ppm supplemental Fe from FeSO4.H2O, 3) 15% whole cottonseed, or 4) diet 3 plus 500 ppm Fe from FeSO4.H2O. Dry matter intakes were similar except for cows fed diet 2, which was lower. Cows fed whole cot...

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Bibliographic Details
Published in:Journal of dairy science 1991-10, Vol.74 (10), p.3457-3467
Main Authors: Barraza, M.L. (Texas AandM University, College Station, TX), Coppock, C.E, Brooks, K.N, Wilks, D.L, Saunders, R.G, Latimer, G.W. Jr
Format: Article
Language:English
Subjects:
Animal Feed
Animals
Biological and medical sciences
BOVIN LAITIER
Cattle - growth & development
Cattle - physiology
Cottonseed Oil
CRECIMIENTO
CROISSANCE
DESINTOXICACION
DETOXIFICATION
ETUVAGE
Feces - chemistry
Feed and pet food industries
Female
Ferric Compounds - pharmacology
Follow-Up Studies
Food Handling
Food industries
Fundamental and applied biological sciences. Psychology
GANADO DE LECHE
Glycine max
GOSIPOL
GOSSYPOL
Gossypol - metabolism
Gossypol - toxicity
GRAINE DE COTON
INGESTION DE PIENSO
Iron - administration & dosage
Iron - metabolism
Lactation - drug effects
Male
METABOLITE
METABOLITOS
PELLETAGE
PILDORACION
PRISE ALIMENTAIRE (ANIMAUX)
SANG
SANGRE
SEMILLA DE ALGODON
SULFATE FERREUX
SULFATO FERROSO
TEMPERATURA DEL CUERPO
TEMPERATURE CORPORELLE
VAPORIZACION
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Summary:Thirty-two lactating cows were fed ad libitum diets with 1) 18.7% soybean meal, 2) diet 1 plus 500 ppm supplemental Fe from FeSO4.H2O, 3) 15% whole cottonseed, or 4) diet 3 plus 500 ppm Fe from FeSO4.H2O. Dry matter intakes were similar except for cows fed diet 2, which was lower. Cows fed whole cottonseed diets ingested 23 g/d of free gossypol per cow. Free gossypol apparently excreted was lower than its intake. Iron excretion was similar to Fe intake. Blood metabolites and productive performance did not differ among the diet groups. No signs of gossypol toxicity were observed. Twelve neonatal Holstein male calves were fed a commercial milk replacer for 4 wk, then were allowed ad libitum access to diets with 1) 27% soybean meal, 2) 50% whole cottonseed, or 3) diet 2 plus 500 ppm Fe from FeSO4.H2O. Dry matter intakes were similar but slightly lower for calves fed diet 3. Daily individual intakes of free gossypol from diets 2 and 3 were 2 g, which was lower than the expected 4 g due to an apparent effect of pelleting. Blood metabolites did not differ among the groups, and calves averaged about 0.6 kg of daily gain on these diets. A follow-up study showed that pelleting reduced free gossypol by as much as 70% in whole cottonseed and by 48% in cottonseed meal. Pelleting represents a mechanism to decrease the toxicity of gossypol in cottonseed products
ISSN:0022-0302
1525-3198
DOI:10.3168/jds.S0022-0302(91)78536-6