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Articles by B.D. Nkosi
Total Records ( 2 ) for B.D. Nkosi
  B.D. Nkosi and M.M. Ratsaka
  Experiment was conducted to study the effect of dietary inclusion of Discarded Beetroot (DB) and Potato Hash Silage (PHS) on the growth performance of South African Dorper lambs. Potato hash silage was produced in 210ldrums for 3 months and its fermentation characteristics were determined. Diets that contained no agro-industrial by-product (T1), DB (T2) or DB in combination with PHS (T3) were formulated and fed to 24 lambs of 24.5±0.275 kg body weight (8 per treatment). The PHS was poorly fermented as indicated by lower concentrations of lactic acid, higher butyric and ammonia-N. Higher (p<0.05) Dry Matter Intake (DMI) was obtained in T1 diet compared to the others. Lambs on diet T3 had lower (p<0.05) ADG than those fed the other diets. Improved (p<0.05) digestibility of CP was obtained in T1 and T2. It was concluded that dietary addition of poorly fermented potato hash silage resulted in lower ADG. Further research on the effect of dietary inclusion of high quality potato hash silage on ruminant performance is needed.
  B.D. Nkosi , A.T. Kanengoni and R. Thomas
  Total Mixed Rations (TMR) that contained 795 g kg-1 (as is basis) of Potato Hash (PH) were formulated and ensiled in 210 L drums (10 drums treatment-1) with or without lalsil fresh (heterofermentative lactic acid bacterial inoculant). After 3 months of ensiling, drums were opened and analysed for fermentation characteristics and nutritive value. This was followed by an 8 weeks growth study using forty crossbred pigs (Large white X landrace), twenty males and twenty females weighing 20±3 kg. Inoculating the TMR with lalsil fresh reduced (p<0.05) the pH, butyric acid, ammonia-N while increasing the concentration of lactic acid, acetic acid and propionic acid compared to the control. The growth performance of pigs was improved (p<0.05) with inoculation compared to control. However, the growth rates of pigs were <120 g day-1 which could be attributed to the lower dietary protein (<80 g kg-1 DM) and higher fibre contents. Further research is needed to evaluate effects of enzyme addition on the ensiling of potato hash and supplementation of energy and protein on feed intake and growth performance of pigs consuming the silage.
 
 
 
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