Evaluation of NSPase inclusion in diets manufactured with high- and low-quality corn on male broilers
2018
Walters, H.G. | Brown, B. | Augspurger, N. | Brister, R. | Rao, S. | Lee, J.T.
The objective of the current study was to evaluate the efficacy of non-starch polysaccharide degrading enzymes (NSPase) inclusion in diets manufactured with high- and low-quality corn on male broilers. Low-quality corn was achieved with the inclusion of 20% corn screenings (CS), and formulations were made on an isonitrogenous and isocaloric basis. Three energy levels were fed throughout the study with and without CS: high energy (HE), low energy (LE, less 110 kcal/kg), and LE with NSPase (LEN). The inclusion of CS decreased (P < 0.05) starter feed consumption (FC) and thus negatively impacted (P < 0.05) d 14 body weight (BW). Reduction of dietary energy increased (P < 0.05) starter mortality corrected feed conversion ratio (FCR). A significant interaction (P < 0.05) was observed on d 27 relating to BW and FC between diet type and energy level, as benefits associated with NSPase inclusion were more pronounced in diets containing CS. Addition of CS increased grower and cumulative FCR (d 1 to 27) as compared to diets excluding screenings. Reduction of dietary energy increased (P < 0.05) grower and cumulative (d 1 to 27) FCR in the LE fed broilers as compared to the HE broilers. FCR was improved (P < 0.05) in the LEN diet during the grower phase and through 27 d of age compared to the LE diet. During the finisher phase, broilers fed diets containing CS exhibited a lower (P < 0.05) FCR as compared to broilers fed diets without screenings. Reduction in dietary energy increased (P < 0.05) FCR; however, inclusion of NSPase diet reduced (P < 0.05) FCR to a level comparable to the HE. In conclusion, the use of CS did not impact final performance, and the inclusion of NSPase reduced FCR when fed in reduced energy diets.
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