Effect of Inclusion Levels of Maize Bran in Pig Diets on Daily Production, Biochemical Composition and Microbial Quality of Pig Manure
DOI:
https://doi.org/10.3923/pjn.2021.83.89Keywords:
Fibrous diet, integrated system, maize bran, manure, nitrogen excretion, pig nutritionAbstract
Objective: The aim of this study was to evaluate the effect of inclusion level of varying dietary maize bran on daily production, biochemical quality and microbial quality of pig manure. Materials and Methods: A total of 12 castrated pigs with an average weight of 15.08±3.08 kg were randomly selected for a 5-week trial. Pigs were subjected to four dietary treatments with the following maize bran rates: 0, 15, 30 and 45% replicated three times. Faeces were collected to measure parameters such as organic carbon, pH, phosphorous, potassium, nitrogen, ammonia content and total bacterial count. Results: Results showed that potassium, phosphorous and organic carbon slightly increased with an increase in maize bran in the diets although they did not show significant difference (p<0.05). Concentrations of pH and ammonia decreased while the concentration of nitrogen increased significantly (p<0.05) as the level of maize bran increased in the diets. Pigs fed on high-maize-bran diets (30 and 45%) released more manure than those fed on the low-maize-bran diets (15%) and control diets. Conclusion: It is concluded that 30% inclusion level of dietary maize bran is the optimum level in order to reduce environmental pollution by reducing ammonia concentration in pig manure while achieving optimum growth performance.
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