Rumen degradation and nutritive utilization of wheat straw, corn stalks and sugarcane bagasse ensiled with multienzymes

H M Gado,M M Y Elghandour,M Cipriano,N E Odongo,A Z M Salem

doi:10.1080/09712119.2016.1217866

H M Gado, M M Y Elghandour + Show 3 more

Open Access

https://doi.org/10.1080/09712119.2016.1217866

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Abstract

ABSTRACTThe aim of this study was to determine the effect of anaerobic ensiling of raw agricultural wastes with a fibrolytic enzyme cocktail (EZ) as a cleaner and sustainable biological product for animal feed. Ten 1-kg samples of wheat straw, corn stalks and sugarcane bagasse were chopped at 5 cm length and mixed with EZ at three levels of 0, 1 or 3 L enzyme/ton of feed, moistened to a relative humidity of approximately 50% and ensiled in plastic bales for 30 days. Additionally, fibrous samples were incubated for 72 h with rumen liquor to determine the digestion of dry matter (DM), neutral detergent fibre and acid detergent fibre. Increasing enzyme level lowered ether extract and nitrogen-free extract contents of fibrous feeds and increased the biodegradation of acid detergent lignin of wheat straw. Anaerobic ensiled corn stalks and sugarcane bagasse with EZ improved the biodegradation of DM and fibre fractions. It could be concluded that ensiling fibres of the three wastes with EZ improved and enhanced their ruminal digestion with the biodegradation rate at 3 L/ton and subsequently produced a cleaner product for animal feed from agriculture wastes.

Highlights

Agricultural wastes such as wheat straw, corn stalks and sugarcane bagasse are carbohydrate-rich materials with a large potential as a source of dietary energy for ruminants
The objective of the current study was to determine the effect of anaerobic ensiling of wheat straw, corn stalks and sugarcane bagasse with a fibrolytic enzyme cocktail (EZ) on nutrient profile and ruminal digestion as a cleaner and sustainable biological product for animal feed
The EZ increased the biodegradation of corn stalks and sugarcane bagasse crude fibres (CF), neutral detergent fibre (NDF), acid detergent fibre (ADF) and acid detergent lignin (ADL) compared to that of the untreated ones (Table 1)

Summary

Introduction

Agricultural wastes such as wheat straw, corn stalks and sugarcane bagasse are carbohydrate-rich materials with a large potential as a source of dietary energy for ruminants. Such feeds have poor nutritional value with low nitrogen and high fibre content (Tang et al 2013; Ghorbani et al 2014; Kholif et al 2014). The application of exogenous fibrolytic enzymes has been shown to improve nutrient utilization and fibre digestibility in vitro (Gado et al 2013; Ghorbani et al 2014; Togtokhbayar et al 2015), in vivo (Salem et al 2013; Valdes et al 2015) and in situ (Chung et al 2012). The objective of the current study was to determine the effect of anaerobic ensiling of wheat straw, corn stalks and sugarcane bagasse with a fibrolytic EZ on nutrient profile and ruminal digestion as a cleaner and sustainable biological product for animal feed

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