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Jul 13, 2022Keywords:
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Assessment of the nutritional quality of Sortex® rejected rice as a feed resource for monogastric animals: Physical characteristics, chemical composition and energy value
Abstract
Sortex® rejected rice (SRR) was investigated for its nutritional quality as an alternative feedstuff to replace maize in monogastric animal diets. Sortex rejected rice meal was characterized with re-spect to physical composition, proximate, energy, fibre, mineral and amino acid profile. The physi-cal analysis indicated that SRR contained 58% broken rice, 34% full grain rice, 4% paddy rice, 3% soil and 1% other plant seeds. The dry matter, organic matter, crude protein, ether extract, crude fibre, ash, nitrogen-free extractive and metabolizable energy contents were: 899.9 g kg-1DM, 888.2 g kg-1DM,118.6 g kg-1DM, 100.2 g kg-1DM, 26.3.g kg-1DM, 11.7 g kg-1DM, 641.5 g kg-1DM, and 14.68 MJ kg-1, respectively. The contents of NDF, ADF, hemicellulose and AIA were, in g (kg-1DM): 9.36, 8.83, 0.54 and 16.8, respectively. SRR was high in its contents of mineral elements such as calcium, phosphorus, potassium and magnesium and therefore can serve as a valuable source of minerals for animals. In comparison with maize, SRR contained more protein, ether ex-tract, fibre, AIA, calcium, potassium, phosphorus, magnesium and metabolizable energy but less of nitrogen-free extractive, ash, NDF, ADF and mineral elements, such as zinc, manganese, copper and iron. Based on the results obtained with the by-product tested in this study, SRR has potential as an alternative feedstuff for animals especially if contaminants, such as other plant seeds and soil particles could be eliminated. Growth trials are recommended with monogastric animals, such as poultry and pigs to evaluate the replacement value of SRR when incorporated into the diets of these farm animals.
