Animal Nutrition and Feed Technology
Year : 2003, Volume : 3, Issue : 1
First page : ( 17) Last page : ( 25)
Print ISSN : 0972-2963.

Nutritional Response to Iodine Supplementation in Goats Fed Mustard Cake Diet

Pattanaik A.K.*, Khan S.A., Kumar A.

Centre of Advanced Studies for Animal Nutrition, Indian Veterinary Research Institute, Izatnagar-243 122, India.

*Reprint request: Dr. A.K. Pattanaik; Tel: +91-581-2442313; Fax: +91-581-2447286; E-mail: patnaik@ivri.up.nic.in.

Received:  8  April,  2002.

Abstract

To assess the influence of supplemental iodine on the nutritional performance of goats fed mustard cake, 14 adult male goats consisting of eight castrated and six intact animals (1.5 years; 21.8 ± 0.6 kg) were randomly allotted into two equal groups - control and experimental. All the animals were fed a concentrate supplement containing 35 per cent mustard cake to meet the requirements for maintenance and about 25g daily gain. Besides, the animals had access to ad libitum oat hay. The experimental goats were provided with extra iodine at the rate of 0.1 mg (as potassium iodide solution)/head/day. A metabolism trial conducted after 60d of experimental feeding revealed no effect of iodine supplementation on the digestibility of nutrients and retention of nitrogen, calcium and phosphorus. The intakes of dry matter, crude protein and metabolizable energy per unit metabolic body size improved (P<0.05) due to extra iodine supplementation. The mean daily feed intake averaged across the 75 days of feeding trial tended to be higher (P=0.091) in iodine supplemented (570.3 g) compared to the control (503.4 g). Likewise, the experimental group also tended to have better (P=0.078) average daily gain (28.6 g) than the non-supplemented control (14.3 g). Although there was no difference in digestibility and retention of nutrients between intact and castrated animals, but the intake and consequently the average daily gain was higher (P<0.05) in the intact than the castrated ones. It is concluded that, iodine supplementation of high mustard cake containing diet exhibited positive influence on the feed intake and growth of goats.

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Key words

Iodine, Mustard cake, Nutrient utilization, Goats.

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