Influence of graded levels of baobab oil seed cake on growth performance and enteric methane emissions in Savannah × Boer crossbreed yearling goats.

2020 ◽  
Author(s):  
Samkelo Saho ◽  
Olusegun O Ikusika ◽  
Conference Thando Mpendulo ◽  
John Mupangwa ◽  
Davison Moyo
Keyword(s):  
Growth Performance ◽  
Body Weight Gain ◽  
Block Design ◽  
Average Daily Gain ◽  
Methane Emissions ◽  
Adaptation Period ◽  
Seed Cake ◽  
Oil Seed ◽  
Enteric Methane ◽  
Enteric Methane Emissions

Abstract Background: The recent concern on the emission of methane from ruminant livestock that contributes to climate change has called for a search of feed ingredient that will mitigate the emission of this gas at the same time increase the growth performance of the animal. One of such feed ingredients could be baobab oil seed cake. This study therefore, investigate the effects of feeding graded levels of baobab oil seed cake (BOSC) on growth performance and enteric methane emissions of Savannah × Boer goats at yearling age.Methods: A total of 24 goats weighing 16.63 ± 3.639 kg were used in a completely randomized block design. The study was conducted for a period of 70 days, with an adaptation period of 14 days. The baobab oil seed cake was included in the diets at 0% (control diet), 15%, 30% and 45 % on a mass basis. The experimental diets were iso-nitrogenous and iso-caloric. The parameters measured include the average daily feed intake (ADFI), body weight gain (BWG), and average daily gain (ADG), feed conversion ratio (FCR), and enteric methane emissions using Laser methane detector (LMD).Results The inclusion of baobab oil seed cake (15%, 30%, and 45% BOSC) in goats’ diets significantly increased (P<0.05) (ADFI). Females in the current study gained more weight than males. It was observed that goats fed diets with 0% baobab oil cake emitted higher methane output (P<0.05). Methane emission decreased as the baobab inclusion levels in the diet increase (P<0.05). Female Savannah ´ Boer goat emitted more methane than male (P<0.05). Both sex and baobab oil cake inclusion levels contributed significantly to methane emissions individually and interactively. Conclusion: Inclusion of baobab oil seed cake in the diet improved growth performance and could also be used to mitigate methane production in Savannah × Boer crossbreed goats at a range of 15 to 45 % inclusion levels without causing any detrimental effects on the goats.’

scholarly journals PSXII-6 Supplementation of Angus crossbred steers with avian-derived polyclonal antibody preparations against the ruminal methanogen Methanobrevibacter ruminantium M1 does not alter in vivo methane emissions

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 447-448
Author(s):  
Mariana E Garcia-Ascolani ◽  
Tessa M Schulmeister ◽  
Federico Tarnonsky ◽  
Federico Podversich ◽  
Gleise Medeiros da Silva ◽  
...  
Keyword(s):  
Treatment Period ◽  
Polyclonal Antibody ◽  
Methane Emissions ◽  
Ex Situ ◽  
Adaptation Period ◽  
Methanobrevibacter Ruminantium ◽  
Enteric Methane ◽  
Antibody Preparations ◽  
Enteric Methane Emissions

Abstract An experiment was conducted to evaluate the effect of supplementing twenty Angus crossbred steers with avian-derived polyclonal antibody preparations (PAP) against the ruminal methanogen Methanobrevibacter ruminantium M1 on in vivo methane production, using the sulfur hexafluoride (SF6) tracer technique (Johnson et al., 1994). Steers were fed chopped bermudagrass hay (BGH) ad libitum and 0.7 kg d-1 of corn gluten feed. The experiment followed a change-over design. Treatments were 1) supplementation of 3 mL d-1 of PAP against M. ruminantium M1 (PAP-M1), and 2) supplementation of 3 mL d-1 of a non-immunized egg product (CON). Individual BGH intake was recorded using an electronic radio-frequency monitoring system (GrowSafe System Ltd., Airdrie, Alberta, Canada). There was a 14-d adaptation period to the feeding regime, with no PAP supplementation, followed by an 18-d treatment period. Steers were dosed with brass permeation tubes with a known release rate of SF6 on d 7 of treatment period. Enteric methane emissions were sampled from d 13 to 18 of the treatment period, into N-rinsed pre-evacuated U-shaped polyvinyl chloride canisters (2 L) through a capillary tube. Methane emissions were averaged per animal within period. Data were analyzed as a change-over design using a model with fixed effects of order, period, and treatment and random effect of steer within order. Dry matter intake (DMI) was not different (P = 0.44) between treatments. Methane emissions, expressed as grams per day (P = 0.86), as grams per kilogram of DMI (P = 0.78), or in terms of methane emission factors (Ym, P = 0.78) were not different between PAP-M1 and CON treatments. Supplementation of steers with PAP against M. ruminantium M1 did not decrease enteric methane emissions. Based on preliminary ex situ trials, evaluation of different doses and combinations of PAP against other methanogenic species warrant further investigation.

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