The effect of supplemented chestnut tannin to grass silage either at ensiling or at feeding on lamb performance, carcass characteristics and meat quality

Abstract

This study was designed to investigate the effect of supplemented chestnut hydrolysable tannin (HT) both at ensiling and at feeding on lamb growth, carcass characteristic, and meat quality. Twenty tons of ryegrass (Lolium perenne) were used to produce silage. The ryegrass was treated at ensiling with one of three additives: 30 g kg-1 DM chestnut HT (GET), an inoculant as a positive control (GI), or water as a negative control (G). Another two treatments were made from ensiled grass by adding the 30 g kg-1 DM of chestnut HT to either positive (GI+T) or negative (GT) control. Forty Suffolk cross Mule lambs were used in this experiment and allocated to receive one of five experimental forage treatments with eight lambs per treatment. The diet consisted of two parts: concentrate and silage. Lambs were fed 215 g DM day-1 lamb of concentrate diet and ad libitum grass silage for seven weeks and then slaughtered. Back fat thickness tended to be lower (p= 0.07) for lambs fed the GT and GI+T treatments compared to lambs in the other experimental groups’ (10.0, 10.1, 9.8, 10.0, and 9.8 mm for GET, G, GT, GI, and GI+T, respectively). Feeding lambs GET tended to reduce (p= 0.06) meat lightness (L*) compared to the other treatments. Ammonia nitrogen concentration in rumen fluid was reduced significantly (p< 0.05) when lambs consumed diets treated with tannin both at ensiling and at feeding (0.14, 0.19, 0.17, 0.17 and 0.14g l-1 GET G, GT, GI, and GI+T, respectively). The experimental treatments had no effect (p> 0.05) on voluntary feed intake (914, 916, 899, 928, or 914 g day-1 for GET, G, GT, GI, and GI+T, respectively) or lamb performance.

Chestnut tannin extract modulates growth performance and fatty acid composition in finishing Tan lambs by regulating blood antioxidant capacity, rumen fermentation, and biohydrogenation

“…Because tannin can increase rumen escape protein, it induces an increase in the supply of digestible protein to the small intestine and the absorption of amino acids into the blood, thus improving growth performance [ 19 ]. These results are inconsistent with those of Taha et al [ 9 ], who reported that CTE (30 g/kg DM) supplementation negligibly impacted lamb growth performance. The reason for this discrepancy could be associated with the dosage of tannin.…”

“…These results might be related to lower muscle fat deposition. According to research, up to 93% of c9, t11 CLA in milk originates through t11 C18:1 conversion [ 9 ]. Meanwhile, Palmquist et al [ 10 ] noted that the extent of c9, t11 CLA endogenous biosynthesis in lamb muscle was similar to that reported in milk.…”

“…As reported by Aguerre et al [ 8 ], adding a mixture of 0.45% chestnut and quebracho tannins lowers feed efficiency in dairy cows while increasing milk protein content. Moreover, Taha et al [ 9 ] reported that adding chestnut tannin extract (CTE) to ryegrass silage reduces ammonia nitrogen (NH 3 -N) concentration in lamb rumen. In contrast, Mergeduš et al [ 10 ] discovered that supplementing CTE with a low-protein diet elevates growth performance and nutrition efficiency in bulls, without affecting slaughter performance or meat quality.…”

Autumn grass treated with a hydrolysable tannin extract versus lactic acid bacteria inoculant: Effects on silage fermentation characteristics and nutritional value and on performance of lactating dairy cows

“…This was confirmed in the study of Herremans et al (2019) who also reported no effects on DMI and BW from feeding an oak tannin‐treated grass (3rd cut) silage (6.1 g HT/kg DM) compared to a control treatment in a crossover experiment with six lactating Holstein cows. Taha et al (2022) also report no effect on lambs’ feed intake when fed grass silage treated with 22.5 g/kg DM chestnut HT as compared to a grass silage treated with an inoculant.…”

Effect of Implanting Zeranol on Growth and Carcass Characteristics of Awassi Lambs and Goat Kids Raised Under Commercial Condition

“…The price of animal feed ingredients has been increasing linearly since the mid of the last century (30). DEFRA (9) reported that the price of soybean meal, rapeseed meal, maize gluten, brewers' grain, and silage have been increased by approximately 140, 80, 75, 100 and 50% respectively, from 2005 until 2014, and this has encouraged ruminant farmers to maximize feed efficiency in order to reduce animal production cost.…”