Protease treatment of canola meal-containing Japanese quail diets: Effect on physiological parameters and meat quality traits

Abstract

The utility of canola meal as protein source for quails may be limited by trypsin inhibitors that interfere with protein digestion. This study was, therefore, designed to assess the effect of including a heatstable protease mono-enzyme (75'000 PROT/g; EC/IUB no. 3.4.21) in canola meal-containing diets on physiological and meat quality traits of adult female Japanese quails. A total of 240, five-week old quails (163.9 ± 9.56 g live-weight) were distributed into 30 replicate pens, to which five isocaloric and isonitrogenous diets were randomly allocated. The diets were: control diet (CON; a commercial grower mash with no canola meal (CM) inclusion); control diet in which 17.5% of soybean ingredients were replaced with CM (CM0), and CM0 diet treated with 0.01%, 0.02% or 0.03% of protease (CM01, CM02 and CM03, respectively). Quails were slaughtered at 10 weeks of age. There was no week × diet interaction effect on average weekly feed intake (AWFI), average weekly weight gain (AWG) and feed conversion efficiency (FCE). Protease inclusion had no effect on haemo-biochemical parameters, overall growth performance, internal organs, carcass characteristics, and meat quality parameters. It was concluded that inclusion of protease does not improve the utilization of CM-containing diets in adult female Japanese quails. ARTICLE HISTORY

A Nutritional Evaluation of Insect Meal as a Sustainable Protein Source for Jumbo Quails: Physiological and Meat Quality Responses

“…Nonetheless, no dietary influences were observed for all the other blood parameters including the liver enzymes (ALKP and ALP), suggesting that partial replacement of soybean products with BSFL meal did not compromise the health status of the birds. Furthermore, the hemato-biochemical values reported in this study fell within the normal ranges reported for quails [3,26,27]. In addition, several studies also revealed no significant dietary effects on blood parameters of broilers [21], laying hens [22], and Barbary partridges [28] when fed with a variety of insect meals.…”

“…This will inevitably lead to higher levels of atmospheric carbon [2] due to deforestation and land preparation activities. The demand for soybean, the main protein source in poultry diets, has also steadily increased due to competition between animal and human needs [3]. This has led to higher market prices for this vegetable protein thus compromising its contribution to food and nutrition security.…”

Effect of Pre-Treating Dietary Green Seaweed with Proteolytic and Fibrolytic Enzymes on Physiological and Meat Quality Parameters of Broiler Chickens

“…It was, therefore, expected that pre-treatment of the seaweed with both the protease mono-enzyme and cellulolytic multi-enzymes would improve the utilization of the diets resulting in improved digestibility and growth performance. The lack of improvement in the feed value of substrates treated with exogenous fibrolytic and protease enzymes has similarly been reported by Mnisi et al [26] and Mnisi and Mlambo [27] in Japanese quail fed canola-containing diets. Likewise, Sayyazadeh et al [28] reported no significant effects on body weight and feed efficiency of chickens fed cereal-based diets supplemented with exogenous enzymes.…”

Rapeseed (Brassica napus): Processing, Utilization, and Genetic Improvement

“…It was recently reported that partial replacement of rapeseed meal did not harm chickens [200,201]. Moreover, Mnisi and Mlambo [202,203] investigated this replacement in Japanese quail diet and found that growth performance, health, and meat quality were not affected at a ratio of less or equal to 12.5%. However, feed intake decreased at 17.5% of rapeseed meal.…”