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Research article2019Peer reviewed

Effects of supplementing low-quality hay with groundnut foliage and cassava tops on feed intake, apparent digestibility and rumen fermentation in crossbred cattle

Samkol, Pok; Sath, Keo; Patel, Mikaela; Seng, Mom; Holtenius, Kjell

Abstract

Four adult crossbred cattle, fitted with rumen fistula in the dorsal sac, were randomly allocated to four treatments in a 4 x 4 Latin-square design to study the effects of supplementing sun-dried groundnut (Arachis hypogea L.) foliage (DGF) and sun-dried cassava (Manihot esculenta, Crantz) tops (DCT) on feed intake, apparent digestibility and rumen fermentation. All animals were fed a basal diet of rice straw ad libitum and para grass (Brachiaria mutica) at 1% of liveweight (LW). The four experimental diets were as follows: (1) control, basal diet without supplement; (2) DGF, basal diet + DGF; (3) DCT, basal diet + DCT; and (4) DGF+DCT, basal diet + DGF + DCT. The supplementary feeds were fed to the level of 2 g crude protein (CP)/kg LW in Diets 2 and 3 and 1 g CP/kg LW of each feed in Diet 4. The results indicated that total intake of dry matter (DM), organic matter and CP increased with DGF and DGF+DCT diets, while neutral detergent fibre (NDF) intake was highest in the DGF diet. Digestibilities of DM, organic matter, CP and NDF were improved in DGF and DGF+DCT treatments. However, the diet with DCT supplement had lowest CP and NDF digestibility. Ruminal NH3-N and total volatile fatty acids increased in all diets with supplements, but ruminal pH, volatile fatty acid profile and in sacco losses of DM, CP and NDF of sun-dried para grass in the rumen did not differ among the treatments.

Keywords

in sacco study; in vivo study; rumen-fistulated cattle

Published in

Animal Production Science
2019, Volume: 59, number: 9, pages: 1660-1666
Publisher: CSIRO PUBLISHING