Abstract
ABSTRACT The study investigated how sprouted-papaya seed meal (SPSM) a total of affected the growth and carcase traits of broilers. Based on a completely randomized design, 390 day-old Lohmann broiler chicks were allotted to CONT (chicks provided with control diet), SEED25 (diet containing 2.5% papaya seed meal), GERM1 (diet containing 1% SPSM), GERM25 (diet containing 2.5% SPSM) and GERM5 (diet containing 5% SPSM). Body weight and feed intake of chickens were weekly recorded from 14 to 36 days of age, while birds (six birds per treatment group; 30 birds in total) were slaughtered at day 36. Feeding SPSM up to 5% did not impair (p > 0.05) broilers’ growth or feed intake. At 5%, SPSM compromised (p < 0.05) feed conversion ratio (FCR) and reduced breast meat proportion. SPSM at 2.5% in diets had no (p > 0.05) detrimental effects, while papaya seed meal at the same proportion lowered (p < 0.05) final body weight, weight gain, and cumulative feed intake. Overall, SPSM may be incorporated in broiler rations up to 2.5% with no harmful effects on growth, feed intake, FCR and carcase traits of broiler chickens.
Highlights
Yellow maize and soybean meal (SBM) are the primary components of broiler rations, serving respectively as energy and protein sources
During the COVID-19 pandemic, broiler breeders are extremely concerned about the dearth of yellow maize and SBM and their expensive price
Due to lock-down in some regions, the supply chain for yellow maize is interrupted, while the importation of SBM is disrupted during the pandemic
Summary
Yellow maize and soybean meal (SBM) are the primary components of broiler rations, serving respectively as energy and protein sources. Due to lock-down in some regions, the supply chain for yellow maize is interrupted, while the importation of SBM is disrupted during the pandemic. This circumstance forces farmers to seek for alternate energy and protein sources in order to ensure the broiler production sustainability. On 2016, the global production of papaya fruit was 13.2 metric tons [1]. Given that the seed from ripe papaya accounts for around 16% of the fresh fruit weight [2], papaya seed was produced in 2016 for approxi mately 2.11 metric tons (in fresh/wet condition). Due to its high fibre (26.2–45.6%, depending on the papaya varieties) and anti-nutritional com pounds (oxalate, tannins, and phytate), papaya seed should only be included at a maximum of 5%, since greater inclusion levels impaired growth [2,4]
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