August 14, 2017

15/08/2017: Supplemented diets

by Manathaya Taelibhong, Glenmer B. Tactacan, Kabir Chowdhury, Supornchai Sri-Nhonghang, and Yuwares Ruangpanit Jefo I&D; Jefo Thai; and Kasetsart University

Significant cost savings obtained when broiler chickens are fed protease-supplemented corn-soy based and low digestible protein diets

The fluctuating cost and quality of major protein sources used in poultry feed are forcing feed manufacturers and integrators worldwide to use cheaper but poorly digestible raw materials such as meat and bone meal, rapeseed meal, sunflower, and others

Image credit: Christopher Paquette on Flickr
(CC BY 2.0)
These alternative raw materials are usually poorly characterised, possess an imbalanced amino acid profile, and may contain some anti-nutrients limiting their use in animal feed. Due to their lower nutritional value (lower digestibility, higher anti-nutritional content), diets formulated with these alternative raw materials often lead to poor performance of the animals.

Currently, various dietary strategies are being used to improve the quality of feed ingredients and alleviate their adverse effects on animal performance. These strategies include but not limited to phytogenic compounds, probiotics, organic acids, and enzymes.

Enzymes are one of the most frequently used feed based solutions available today. Among the enzyme groups, phytase, carbohydrases, and proteases are used to improve mineral, energy, and protein digestibility of the feed.

Among the commercial protease enzymes, most are genetically modified mono-component proteases that may or may not be protected to prevent degradation during the manufacturing process.

Some of them are also in liquid form for post-pelleting applications. Some multi-enzymes containing proteases are also available and being widely used by the industry. In this study, effects of a multi-component protease (a protease complex – Jefo Nutrition Inc., Canada) derived from a non-GMO bacterial fermentation was assessed in broiler chicken in two different diets.

One is a regular corn-soy based diet and the other is corn-soy-rapeseed meal-meat and bone meal based diet. The protease complex was used on both diets modified using the nutrient uplift associated with Jefo protease.

A total of 1200 day-old male birds (Ross 308) were randomly assigned to receive one of the four treatment diets (Table 1 and 2) for 35 days (10 replicates and 30 birds per replicate).

The positive control (adequate) group was formulated based on corn and soybean meal while the negative control (adequate) group was formulated based on corn and soybean meal with a portion of soybean meal partially replaced by a combination of rapeseed meal and meat and bone meal.

Both control groups were formulated to meet the nutrient recommendation of Ross 308. Using the Jefo protease nutrient uplift, two other reduced diets (positive and negative control reduced) were formulated and supplemented with the protease complex at 125 g/MT.

The cost per unit metric tonne of feed was calculated based on the existing prices of feed ingredients in Thailand at the time of the study. The parameters tested were bodyweight gain (BWG), feed intake (FI), feed conversion ratio (FCR) at 0-7, 0-17, and 0-35 d, and feed cost per unit bodyweight.

At the end of the trial, fecal material from all four treatments were collected to assess apparent total tract digestibility (ATTD) of crude protein.

Read the full article, HERE.

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