Growth performance of growing baladi goats fed diets containing different levels of sundried peel potato waste [electronic resource].

Includes references.

Twenty one male Baladi goats with an average body weight of (11.217 ± 0.341 kg) and aged 6 months were divided into three similar experimental groups, eaoh of 7 kids to study the effect of partial replacing yellow corn with peel potato waste (PPW) on performance of growing Baladi goats. Experimental rations contained PPW to replace 0% PPW (R₁), 25% PPW (R₂) and 50% PPW (R₃) of yellow corn. Feeding trial lasted 15 WKS (105 days). Animals were fed according to NRC allowances. Peanut vines hay (PVH) as a roughage source was offered to all animals at level (200g/h/day), the concentrate:roughage ratio was (72:28%). Experimental rations were almost iso caloric and iso nitrogenous. The results showed that, daily dry matter and nutrient intakes were not significant affect (p>0.05) by replacement yellow corn with peel potato waste in growing goat rations. Feed intake by the different groups were in the same range. Feeding growing kids on diets containing PPW caused insignificantly increase (P>0.05) water intake by 5% for (R₂) and by 16% for (R₃) compared with the control ration (R₁). Also, water intake was increased (p>0.05) by 11% for R₃ compared with R₂. Feeding growing kids on PPW containing diets was significantly increased (p<0 05) ruminal pH and Total volatile fatty acids (TVFA's) concentration but, significantly decreased (P<0.05) ruminal ammonia nitrogen (NH₃-N) concentrations. Sampling time at 3hrs post feeding significantly decreased (p<0.05) ruminal pH while, significantly increased (p<0.05) ruminal NH₃-N and TVFA's concentrations. No significant interaction was found between dietary treatments (PPW levels) and sampling time (PxS) on ruminal pH, but significant interaction (PxS) was observed for ruminal ammonia and total volatile fatty acids concentrations. Feeding kids on diets replaced 25% of yellow corn by PPW (R₂) improved average daily gain (ADG) by about 23% while, 50% PPW (R₃) decreased ADG by about 4% compared with the control ration (R₁). Feed efficiency (g.gain/g.intake) of 25% PPW diet (R₂) was improved by 20% and 27% when it compared with the control diet (R₁) and 50% PPW (R₃), respectively, while R₃ decreased feed efficiency by 5.4% compared with the control diet (R₁). Feeding growing kids on diets containing PPW caused net revenu equals 61.5% and 18.5% for (R₂ and R₃), respectively compared with the control diet (R₁). Replacement of corn by PPW in goat rations improved ADG, feed efficiency and decreased daily feeding cost, consequantly improved relative economical efficiency.

Summary in Arabic.

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