GROWTH-PERFORMANCE AND CARCASS CHARACTERISTICS OF TANZANIAN GOATS FED CHLORIS-GAYANA HAY WITH DIFFERENT LEVELS OF PROTEIN-SUPPLEMENT

被引：24

作者：

MTENGA, LA

KITALY, AJ

机构：

[1] Department of Animal Science and Production, Faculty of Agriculture, Sokoine University of Agriculture, P.O. Box 3004, Chuo Kikuu

[2] Livestock Production Research Institute, TALIRO, Private Bag

来源：

SMALL RUMINANT RESEARCH | 1990年 / 3卷 / 01期

关键词：

D O I：

10.1016/0921-4488(90)90025-2

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

Twenty-four growing indigenous Tanzanian male goats were studied in a completely randomized design experiment with four treatment groups for growth rate, feed conversion ratio (FCR), dressing percentage and carcass composition. The four groups of goats were fed hay ad libitum (A) and hay ad libitum with 200 g/day of concentrate supplement containing 102, 150 or 177 g CP/kg DM (B, C, and D). Protein (CP) supplementation resulted in increased total dry matter intake and decreased feed conversion ratio. Compared with the control group (A), animals on treatment D had the highest growth rate (62.5 ± 8.01 vs. 22.6 ± 10.91 g/day) and a superior feed conversion ratio (8.8 ± 1.30 vs. 22.8 ± 11.65 g DM intake/g gain). Daily crude protein and digestible energy intake increased with higher protein levels. Supplemented goats had significantly higher dressing percentage and fat depot percentages in kidney and gut. Lean meat percentages were 62.6 ± 2.50, 64.2 ± 0.89, 60.9 ± 3.44 and 63.3 ± 1.90 for treatments A, B, C and D, respectively. Control goats had significantly lower proportions of fat and higher proportions of bone. There was little indication that protein level in supplements affected the composition of carcasses. © 1990.

引用

页码：1 / 8

页数：8

共 19 条

[1]

Andrews, Orskov, The nutrition of the early weaned lambs II The effect of dietary protein concentration feeding level and sex on body composition at two liveweights, The Journal of Agricultural Science, 75, pp. 19-26, (1970)

[2]

AOAC, Official Methods of Analysis, (1975)

[3]

ARC, Tne Nutrient Requirements of Ruminant Livestock, Technical Review and Summaries, (1980)

[4]

Berg, Butterfield, New concepts of cattle growth, (1976)

[5]

Butterworth, The digestibility of tropical grasses, Nutr. Abstr. Rev., 37, pp. 349-368, (1967)

[6]

Devendra, Burns, Goat Production in the Tropics, Tech. Commun. No. 19, (1970)

[7]

Duncan, Multiple Range and Multiple F Tests, Biometrics, 11, pp. 1-42, (1955)

[8]

Hutchison, 3rd Annual Report. Livestock Research Section, (1964)

[9]

Karue, The nutritive value of herbage in semi-arid lands of East Africa, 1. Chemical composition, E. Afr. Agric. For. J., 40, pp. 89-95, (1974)

[10]

Kitaly, Effect of supplementing low quality hay with different protein levels on growth performance of goats, M.Sc. Thesis, (1982)

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