Medycyna Wet. 66 (10), 672-674, 2010
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| Zawadzki W., Balcerzak A., Kotecki A., Malarz W., Czerski A., Graczyk S. |
| Influence of the addition of yellow lupin seeds on the inhibition of methanogenesis and energetic value of the digestive content of goats in vitro |
| The goal of the research has been to determine the influence of ground seeds of yellow lupin of Markiz and Teo types on the value of selected fermentation parameters, such as pH, methane production and energy value of goats rumen content in vitro. The samples for analysis were drawn at the 1, 2, 4, 6 and 24 hours of fermentation. Fermentation was conducted in specially designed vessels. Based on conducted tests, it was determined that the addition of yellow lupin to the fermented rumen contents, especially in the amount of 5 g per vessel, caused the inhibition of methanogenesis (both Markiz type and Teo type) in the 4th hour by 50% (p < 0.001) and decrease of energy level by 45%. During bacterial fermentation, gasses are also produced in the rumen. The most important ones include carbon dioxide and methane. The quantitative proportion of these two gases (CO2 : CH4) is frequently used for the evaluation of the fermentation process correctness. It increases with the introduction of nutritive fodder, and decreases when feeding with bulky feed. The production of large amounts of methane during fermentation causes considerable energy losses. The losses can be reduced through a modification of the nutritional dose or introduction of methanogenesis inhibitors into the fodder. The addition of lupin of both Markiz and Teo type caused the reduction of methane production. This is very important from the point of view of animal production profitability, because it results in the better use of fodder by the animal. The reduction of methane production by the addition of lupin to the nutritional dose is also of ecological importance. Methane is classified as a greenhouse gas, and its emission reduction through the ruminants diet modification has been the subject of numerous publications. |
| Keywords: in vitro fermentation, methane, energy value, goats |