Volume 14, Issue 4 (12-2023)
Res Anim Prod 2023, 14(4): 51-61 |
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Babaei M, Ghoorchi T, Toghdory A. (2023). Impact of Replacing Different Levels of Potato Waste Silage with Barley on Growth Performance, Digestibility, Rumen and Blood Parameters of Fattening Lambs. Res Anim Prod. 14(4), 51-61. doi:10.61186/rap.14.42.51
URL: http://rap.sanru.ac.ir/article-1-1373-en.html
URL: http://rap.sanru.ac.ir/article-1-1373-en.html
1- Animal Nutrition, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
2- Animal Nutrition and Poultry, Gorgan University of Agriculture and Natural Resources, Gorgan, Iran
2- Animal Nutrition and Poultry, Gorgan University of Agriculture and Natural Resources, Gorgan, Iran
Abstract: (2111 Views)
Extended Abstract
Background: The use of agricultural by-products instead of grain seeds in livestock diets has become an important topic for scientific study. One such product is potato waste, which, if properly processed through methods such as ensiling, can replace cereal seeds like barley in the diet. This is due to the favorable nutritional value of potato waste, which can improve animal growth performance, reduce feed costs, and prevent food waste. Therefore, the purpose of this study was to investigate the effect of replacing different levels of potato waste silage with barley on the growth performance, digestibility, and rumen and blood parameters of fattening lambs.
Methods: In this study, 30 mixed male lambs of the Zell and Afshar breeds, with a mean weight of 26±2 kg and a mean age of 5.5±0.4 months, were used in a completely randomized design (CRD) with 5 treatments and 6 replications for 90 days. The experimental treatments included a control treatment (without potato waste silage) and treatments containing 25%, 50%, 75%, and 100% potato waste silage replacing barley seeds (based on dry matter).
Results: The results of performance traits showed significant differences in fattening weight, daily weight gain, dry matter intake, and feed conversion ratio among the experimental treatments (p<0.05). The highest and lowest final weights, daily weight gains, and dry matter intakes were observed in the treatment containing 50% potato waste silage and the control treatment, respectively. The apparent digestibility of nutrients in the experimental diets also showed significant differences, particularly in the apparent digestibility of crude protein and neutral detergent fiber (NDF) (p<0.05). The highest apparent digestibility of crude protein (CP) was observed in the treatment containing 50% potato waste silage, while the control treatment had the lowest. The results of some blood serum parameters indicated significant differences in the concentrations of glucose, triglycerides, low-density lipoprotein (LDL), and blood urea nitrogen (BUN) among the experimental treatments (p<0.05). Rumen fermentation parameters showed significant differences in the populations of lactic acid bacteria, coliforms, protozoa, rumen liquid ammonia nitrogen, total volatile fatty acids (VFAs), acetic acid, propionic acid, butyric acid, valeric acid, and isovaleric acid among the experimental treatments (p<0.05). The highest population of lactic acid bacteria (100%), the lowest coliform population (70%), the highest population of protozoa, and the highest concentration of VFAs were observed in the treatments containing 100%, 70%, 100%, and 50% potato waste silage, respectively.
Conclusion: The overall results of the present study indicate that growth performance, crude protein digestibility, total concentration of rumen fluid fatty acids, and the populations of bacteria and protozoa improved with the consumption of 50% potato waste silage.
Methods: In this study, 30 mixed male lambs of the Zell and Afshar breeds, with a mean weight of 26±2 kg and a mean age of 5.5±0.4 months, were used in a completely randomized design (CRD) with 5 treatments and 6 replications for 90 days. The experimental treatments included a control treatment (without potato waste silage) and treatments containing 25%, 50%, 75%, and 100% potato waste silage replacing barley seeds (based on dry matter).
Results: The results of performance traits showed significant differences in fattening weight, daily weight gain, dry matter intake, and feed conversion ratio among the experimental treatments (p<0.05). The highest and lowest final weights, daily weight gains, and dry matter intakes were observed in the treatment containing 50% potato waste silage and the control treatment, respectively. The apparent digestibility of nutrients in the experimental diets also showed significant differences, particularly in the apparent digestibility of crude protein and neutral detergent fiber (NDF) (p<0.05). The highest apparent digestibility of crude protein (CP) was observed in the treatment containing 50% potato waste silage, while the control treatment had the lowest. The results of some blood serum parameters indicated significant differences in the concentrations of glucose, triglycerides, low-density lipoprotein (LDL), and blood urea nitrogen (BUN) among the experimental treatments (p<0.05). Rumen fermentation parameters showed significant differences in the populations of lactic acid bacteria, coliforms, protozoa, rumen liquid ammonia nitrogen, total volatile fatty acids (VFAs), acetic acid, propionic acid, butyric acid, valeric acid, and isovaleric acid among the experimental treatments (p<0.05). The highest population of lactic acid bacteria (100%), the lowest coliform population (70%), the highest population of protozoa, and the highest concentration of VFAs were observed in the treatments containing 100%, 70%, 100%, and 50% potato waste silage, respectively.
Conclusion: The overall results of the present study indicate that growth performance, crude protein digestibility, total concentration of rumen fluid fatty acids, and the populations of bacteria and protozoa improved with the consumption of 50% potato waste silage.
Keywords: Apparent digestibility, Fattening lambs, Growth performance, Potato waste, Ruminal fermentation
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