Methane (CH4) production from fermentation of ruminants is responsible for global warming and the CH4 generated by livestock contributes up to 40% of greenhouse gas (GHG) emissions1. Many attempts have been made to decrease CH4 production from ruminants which includes; CH4 vaccination, dietary manipulation and dietary management. Dietary manipulation can decrease organic matter (OM) fermentation in the rumen that may help alleviate CH4 emission in ruminants2.
Supplementation of fats and oils in ruminant diets with fats and oils are used to increase energy density and in order to manipulate rumen fermentation. Using different oils such as; soybean oil (SO), sunflower oil (SFO) and fish oil (FO). These oils can modify the bio-hydrogenation process, thereby managing rumen fermentation end products.
Sunflower oil is a high polyunsaturated fat and it confirmed to reduce CH4 production. Non-protein nitrogen is generally used to increase nitrogen (N) in ruminant diets due to it is inexpensive and high contents of urea, nitrate (NO3), nitrite. In addition, supplemental NO3 has been reported to reduce CH4 production3.
In these context researchers from Thailand, carried out an experiment in which they studied the combined effect of CH4 and SFO that can potentially inhibit the CH4 production in order to improve the rumen fermentation and product. They determined the concentrate on feed intake, nutrient digestibility and rumen microorganisms of meat goats fed rice straw as the main roughage source4.
For this purpose 8 male ruminants were taken and were divided into different groups. the effect of the potassium nitrate (2 and 3% KNO3 concentrate) and sunflower oil (3 and 6% Sunflower oil concentrate) levels on feed intake, rumen production and microbial population.
It was observed that there was no interaction between the levels of potassium nitrate (KNO3) and sunflower oil on any parameters. Voluntary feed intake, nutrient digestibility and nitrogen utilization were not influenced by the SFO and KNO3 levels.
The experiment also showed that addition of 6.0% SFO reduced total bacteria population when compared with 3.0% SFO. It was concluded by the researchers that the feeding combination between nitrate and sunflower oil can be beneficial to reduce CH4 production by goats fed rice straw. So that the study would be pointed out that ruminant fed low quality roughages can be improved by combining nitrate and sunflower oil.
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17 November, 2019