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Nkosi B.D.,ARC LBD Animal Production Institute | Meeske R.,Outeniqua Research Farm | Groenewald I.B.,University of the Free State
Livestock Research for Rural Development | Year: 2010

Experiment was conducted to study the effect of whey and molasses addition on potato hash at ensiling on silage quality and nutrient digestibility in sheep. Potato hash silage was produced by mixing 800 g/kg potato hash with 200 g/kg hay, and ensiled in 210 l drums for 90 days. Higher (P<0.05) concentrations of lactic acid and reduced pH, ammonia-N and butyric acid occurred in the whey and molasses treated silages compared to the control. Furthermore, feed intake and nutrient digestibility ere improved (P<0.05) with whey and molasses addition compared to the control. It was concluded that feeding the potato hash silage without supplementation may lead to poor animal performance due to low dry matter content of the silage. Source


Totally mixed rations (TMRs) that contained 804g/kg potato hash (PH) were ensiled in 1.5 L jars with or without a heterofermentative inoculant, Lalsil Fresh Lactobacillus buchneri (LB) for 3 months. Jars were opened on days, 0, 3, 7, 10, 21, 45, 60 and 90 of ensiling and sampled for fermentation and chemical composition determinations. Aerobic stability was determined on day 90 of ensiling. Treatments were LB treated TMR (LB-TMR) and untreated TMR (U-TMR). Furthermore, three TMRs that contained 801g/kg of either maize (320g DM/kg) or PH (as fed basis) were ensiled for 90 days in 210 L drums for lamb growth and digestibility studies. The ensiled TMRs were: Maize TMR (M-TMR), U-TMR and LB-TMR and were fed to 24 South African Dorper lambs (20± 0.152kg live weight) that were randomly allocated to the three TMR treatments (8 lambs/pretreatment). Inoculation with LB decreased (P<0.05) pH, butyric acid, NH3-N, fibre fractions, CO2 production and yeast population while lactic acid, acetic acid and propionic acid concentrations were increased (P<0.05) compared to U-TMR silage. The ensiled LB-TMR was aerobically more stable than U-TMR silage as indicated by lower (P<0.05) CO2 production and yeast population and higher concentrations of acetic acid. Higher (P<0.05) feed intake, average daily gain (ADG), nutrient digestibility and N retention occurred in LB-TMR silage compared to the other silages. It was concluded that LB was effective in producing a better quality PHS as indicated by improved fermentation, aerobic stability, lamb growth performance and digestibility of LB-TMR silage. © 2010 Elsevier B.V. Source


Nkosi B.D.,ARC LBD Animal Production Institute
South African Journal of Animal Sciences | Year: 2010

The aim of the study was to determine the effect of whey or molasses on the fermentation quality when added to potato hash silage. In addition, lamb performance, digestibility and feed intake of diets containing potato hash silage were compared with a diet containing maize silage (MSd). Potato hash silage (treated with no additive, or whey, or molasses) and MS were produced in 210 L drums for 90 days and the fermentation quality of the silages was determined thereafter. Diets were formulated and fed ad libitum to 32 South African Dorper lambs (23.5 ± 0.873 kg live weight) for 63 days. A digestibility study was conducted during the last week of the study. The untreated potato hash silage (UPHS) was poorly fermented as indicated by higher concentrations of butyric acid, ammonia-N and pH compared to the other silages. Higher dry matter intake (DMI) and daily weight gains (218 and 250 g/d) were obtained with MSd and molasses treated potato hash silage diet (MPHSd) compared to the other diets. Nutrient digestibility was lower in the UPHS diet compared to the other dietary treatments. It was concluded that the fermentation quality of potato hash was improved with the addition of whey and molasses. Furthermore, growth performance was higher with the MSd and MPHSd than of the other treatments, suggesting that MPHSd can safely replace MSd in a lamb diet at a dietary inclusion level of 20% without any adverse effect on animal performance. © South African Society for Animal Science. Source


Nkosi B.D.,ARC LBD Animal Production Institute | van der Merwe H.J.,University of the Free State | Acheampong-Boateng O.,University of Venda | Langa T.,ARC LBD Animal Production Institute
South African Journal of Animal Sciences | Year: 2010

A study was conducted to evaluate the effects of dietary replacement of maize with popcorn waste (PW) on the intake, nutrient digestibility and growth performance of lambs. Diets replacing 0, 25, 50, 75 and 100% maize with PW were formulated and fed ad libitum to 40 South African Mutton Merino lambs (25.0 ± 0.45 kg live-weight). The diets had similar intake and nutrient digestibility of dry matter (DM), organic matter (OM) and neutral detergent fibre (NDF). Lambs fed the 25 and 50% PW diets had higher intakes of crude protein (CP), metabolizable energy and ether extract compared to the other diets. Growth rate was highest (226 g/d) on the 25% diet and lowest (109 g/d) on the 75% PW diet. Best feed conversion ratio (FCR), of 5.1 (kg feed/kg live weight) was obtained with the 0% PW diet. Improved digestibility of CP and EE occurred in the 25 and 75% PW diets. Higher intake of nitrogen (N) and N retention were obtained in the 25 and 50% PW diets. Dietary replacement of >75% of maize resulted in poor animal performance (ADG < 150 g/d and FCR >7.00). It was concluded that PW can replace up to 50% of the maize in diets for growing lambs. © South African Society for Animal Science. Source


Nkosi B.D.,ARC LBD Animal Production Institute | Meeske R.,P.O. Box 249 | van der Merwe H.J.,University of the Free State | Groenewald I.B.,University of the Free State
Animal Feed Science and Technology | Year: 2010

Potato hash, a by-product from the food processing industry, was mixed with wheat bran (70:30) as fed basis and ensiled in 210 l drum for 3 months. Three types of potato hash silages were prepared which were: the control (no additives), bonsilage forte (BF, a homofermentative additive) and Lalsil Fresh LB (LFLB, a heterofermentative additive). After 3 months, the silos were opened and sampled for fermentation characteristics. Diets were produced by mixing potato hash silage with soybean meal (90:10) as fed basis and a digestibility study was conducted using five South African Mutton Merino rams (37.2 ± 2.21 kg live weight) per diet. Inoculating potato hash silage with BF and LFLB reduced (P<0.05) pH, WSC, butyric acid and ammonia N while increasing the concentration of lactic acid compared to the control. A higher concentration of acetic acid was obtained with LFLB inoculation compared to the other silages. The aerobic stability of the silage was improved (P<0.05) with LFLB while it was reduced with BF inoculation as indicated by higher CO2 production from the latter. Intakes of dry (DM) and organic matter (OM) were not affected while that of gross energy and CP were improved (P<0.05) with BF and LFLB inoculations. Inoculants increased CP, energy and aNDF digestibility, but did not alter DM or OM digestibility. Inoculating silage with BF improved (P<0.05) digestibility of ether extract compared to the other treatments, and inoculations resulted in higher (P<0.05) N intake and retention. It is concluded that BF and LFLB improved silage fermentation and diet digestibility of CP, aNDF and gross energy. Inoculation with LFLB improved aerobic stability whilst BF inoculation reduced it. © 2010 Elsevier B.V. All rights reserved. Source

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