Effect of pregnancy on intake, digestibility and
digesta kinetics in heifers fed urea treated rice straws

E. K. Masha; A. E. Kimambo; N. Kanuya; D. M. Mgheni; L. A. Mtenga; M. R. Weisbjerg; G. H. Laswai; T. Hvelplund

doi:10.22358/jafs/74080/2004

Suppl. 1/2004 vol. 13

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SHORT COMMUNICATION

Effect of pregnancy on intake, digestibility and digesta kinetics in heifers fed urea treated rice straws

E. K. Masha ¹

A. E. Kimambo ¹

N. Kanuya ²

D. M. Mgheni ¹

L. A. Mtenga ¹

M. R. Weisbjerg ³

G. H. Laswai ¹

T. Hvelplund ³

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Sokoine University of Agriculture, Department of Animal Science and Production, P.O. Box 3004, Morogoro, Tanzania

Sokoine University of Agriculture, Department of Veterinary Surgery and Therionology, P.O. Box 3020, Morogoro, Tanzania

Danish Institute of Agricultural Sciences, Department of Animal Nutrition and Physiology, Foulum, P.O. Box 50, DK-8830 Tjele, Denmark

Publication date: 2004-08-30

Corresponding author

A. E. Kimambo

Sokoine University of Agriculture, Department of Animal Science and Production, P.O. Box 3004, Morogoro, Tanzania

J. Anim. Feed Sci. 2004;13(Suppl. 1):643-646

DOI: https://doi.org/10.22358/jafs/74080/2004

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heifers

ABSTRACT

Five rumen fistulated heifers weighing 298±4 kg, fed ad libitum urea treated rice straw were used during trimesters 1, 2, and 3 of pregnancy. Voluntary dry matter intake (VDMI), dry matter (DM) and neutral detergent fibre (NDF) digestibility, rumen pool sizes and passage rates were measured. Indigestible NDF was measured by long incubation in situ and used to derive digesta kinetics. The VDMI, digestion and passage rates for DM and NDF fractions, increased (P<0.05) between the 1^st and 3^rd trimester. In conclusion, pregnant heifers fed high NDF based diets, maintains high forage intake by increasing digestion and passage rates.

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