Supplemental protease improves in vitro disappearance of dry matter and crude protein in feather meal and copra meal for pigs

Dong Uk Ha,Beob Gyun Kim,Hyunjun Choi

doi:10.37496/rbz4920200095

Abstract

The aim of the present study was to determine the effects of supplemental protease on in vitro disappearance of dry matter (DM) and crude protein (CP) in feed ingredients for pigs. The test ingredients were three sources of feather meal (FM 1, FM 2, and FM 3), meat and bone meal, soybean meal, corn dried distillers grains with solubles, copra meal (CM), palm kernel meal, wheat, and corn. In experiment 1, in vitro ileal disappearance (IVID) of DM and [...]

Highlights

Proteins are expensive nutritional elements that are essential for maintenance and productive functions of pigs (NRC, 2012)
The aim of the present study was to determine the effects of supplemental protease on in vitro disappearance of dry matter (DM) and crude protein (CP) in feed ingredients for pigs
In the protease supplementation group, the in vitro ileal disappearance (IVID) of CP increased in feather meal (FM) 1 (48.0 vs. 43.8%) and copra meal (CM) (85.3 vs. 77.5%)

Summary

Introduction

Proteins are expensive nutritional elements that are essential for maintenance and productive functions of pigs (NRC, 2012). The use of alternative protein sources such as byproducts has increased due to the price fluctuations of conventional protein sources. The digestibility of alternative protein sources is generally lower than the conventional protein sources (Son et al, 2019). In the gastrointestinal tract of pigs, proteins need to be hydrolyzed by endogenous protease into small peptides and amino acids to be utilized by the host. The digestibility of crude protein (CP) varies depending on ingredients for pigs (NRC, 2012; Stein et al, 2016; Son et al, 2019). The capacity of digestive protease may be insufficient when a large quantity of protein exists in the digesta due to a high-protein ingredient used, such as feather meal (FM; approximately 80% CP), a poultry byproduct (Grazziotin et al, 2006; NRC, 2012)

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