University of Khartoum

Effect Of Dietary Selenium On The Performance Of Crossbreds Goats

Effect Of Dietary Selenium On The Performance Of Crossbreds Goats

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Title: Effect Of Dietary Selenium On The Performance Of Crossbreds Goats
Author: Maha Musa Mohammed Hamouda
Abstract: The objectives of this study were to evaluate the effects of three dietary levels of selenium on body weight and body measurements such as heart girth, neck length and ear length of crossbred (50 %Nubian x Saanen) goats under tropical conditions. The experiment was conducted at the Goat Improvement Centre at Helat Kuku, in the north eastern region of Khartoum state. Twenty one crossbred females were used, the initial weight for group A, B and C (14.6 ± 2, 15.5 ± 2 and 14.2 ± 2 kg) respectively . All individuals were F1 progeny of Saanen sires crossed with local Nubian goats. Their ages were between 3 and 4 months, and they were assigned to three pens in a complete randomized design. Two of the three groups of animals were fed concentrates supplemented with 0.1 and 0.15 mg/kg selenium. The third group of animals was left as control and fed concentrates with no selenium supplementation. Green fodder (Lucerne) was offered at a rate of 0.5kg/head/day. Body measurements including heart girth, neck length, ear length, horn length, croup length, body length, height at withers, fore leg length, hind leg length and body weight were taken every two weeks. The data were analyzed using the SPSS statistical package. The means and standard errors of the 0.1mg/kg selenium supplementation group for heart girth, neck length and horn length 63.31 ± 0.66 cm, 29.59 ± 0.27 cm and 9.00 ± 0.58 cm respectively. Croup length, body length and ear length, 16.24 ± 0.15, 38.93 ± 0.26 cm and 17.37 ± 0.28 cm respectively. Height at withers, fore leg length, hind leg length and body weight 60.22 ± 0.49 cm, 41.16 ±0.34 cm, 47.61 ± 0.37 cm and 19.81 ± 0.45 kg respectively. The means and standard errors of the 0.15 mg/kg selenium supplementation group for heart girth, neck length and horn length 64.99 ± 0.66 cm, 30.89 ± 0.27 cm and 4.38 ± 0.55 cm respectively. Croup length, body length and ear length 17.51 ± 0.15 cm and 39.76 ± 0.26 cm, 16.40 ± 0.28 cm respectively. Height at withers, fore leg length, hind leg length and body weight 61.2 ± 0.49 cm, 42.67 ±0.34 cm, 48.11 ± 0.37 cm and 20.50 ± 0.45 kg respectively. vii The means and standard errors of the 0.00mg/kg selenium supplementation group for heart girth, neck length and horn length 64.53 ± 0.66 cm, 29.46 ± 0.27 cm and 10.23 ± 0.58 cm respectively. Croup length, body length and ear length 17.09 ± 0.0.15 cm, 38.30 ± 0.26 cm and 17.24 ± 0.28 cm respectively. Height at withers, fore leg length, hind leg length and body weight 60.74 ± 0.49 cm, 42.24 ± 0.34 cm, 47.36 ± 0.37 cm and 19.56 ± 0.45 kg respectively. The results showed that the effects of selenium supplementation on heart girth, height at withers, hind leg length and body weight were not significant (P> 0.05). The results also showed that the supplementation of selenium on neck length, horn length, croup length, body length, fore leg length, were highly significant (P< 0.01), while the effects of supplementation of selenium on ear length was significant (P< 0.05). The effects of age on body weight, heart girth, neck length, croup length, horn length, body length, ear length, height at withers, legs length (fore and hind legs) were highly significant (P< 0.01). The interaction between the supplementation of selenium and age on body weight, heart girth, neck length, croup length, horn length, body length, ear length, height at withers, legs length (fore and hind legs) were not significant (P> 0.05). It was concluded that selenium supplementation of up to 0.15 had positive effects on body weight and body measurements.
Description: 103 Pages
URI: http://hdl.handle.net/123456789/8234
Date: 2007


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