Pereira, Odilon G.

Rosa, L. O.

Santos, E. M.

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings XXI International Grassland Congress / VIII International Rangeland Congress Fermentative Profile of Soybean Silages Treated with Molasses and Microbial Inoculant Odilon G. Pereira Federal University of Viçosa, Brazil L. O. Rosa Federal University of Viçosa, Brazil E. M. Santos Federal University of Viçosa, Brazil Follow this and additional works at: https://uknowledge.uky.edu/igc  Part of the Plant Sciences Commons, and the Soil Science Commons This document is available at https://uknowledge.uky.edu/igc/21/15-1/15 The XXI International Grassland Congress / VIII International Rangeland Congress took place in Hohhot, China from June 29 through July 5, 2008. Proceedings edited by Organizing Committee of 2008 IGC/IRC Conference Published by Guangdong People's Publishing House This Event is brought to you for free and open access by the Plant and Soil Sciences at UKnowledge. It has been accepted for inclusion in International Grassland Congress Proceedings by an authorized administrator of UKnowledge. For more information, please contact UKnowledge@lsv.uky.edu. 瞯 662　 瞯 　 Multifunctional Grasslands in a Changing World 　 Volume Ⅱ 　Grasslands/Rangelands Production Systems ——— Forage Quality ,Conservation and UtilizationFermentative profile of soybean silages treated with molasses and microbial inoculantPereira , O .G . , Rosa , L .O . , Santos , E .M .Federal University o f Vi毕osa , Minas Gerais , Brazil . E‐mail : odilon ＠ u f v .brFinancial sup port by CNPq/ FAPEMIGKey words : acetic acid ,butyric acid ,lactic acid ,NH３‐N ,pHIntroduction Legume silages can be interesting alternatives for animal feed , mainly in times of high prices of concentrates .Nevertheless , legumes were regarded as being unsuitable for ensiling as the fermentation was invariably dominated by clostridialeading to a butyrate‐type silage ( McDonald et al . ,１９９１ ) . The addition of microbial inoculant in association with carbohydrate‐rich additives can stimulate the lactic acid bacteria development , reduce losses and improve the fermentation quality of thesilage .Material and methods The study was located at the Federal University of Vi毕osa , Brazil (２０°４５′４０″ S and ４２°５１′４０″ W) fromFebruary ２００７ to May ２００７ . After harvest , soybean plants were chopped and ensiled in ２ kg PVC silos . A ６ × ４ factorialarrangement ( six fermentation periods × four additives ) was used in a complete randomized design , with three replications .The fermentation periods were １ , ３ , ７ , １４ , ２８ and ５６ days . Four additives were evaluated : １‐control ( no additive ) ; ２‐microbial inoculant ( I ; Sil All of Alltech ) ; ３‐I ＋ molasses (２ ,５ ％ ) ; ４‐molasses ( ２ ,５ ％ ) . It was evaluated silages pH andconcentrations of NH３‐N , acetic acid and butyric acid .Results and discussion There was effect ( P ＜ ０ .０５ ) of fermentation periods and additives for pH , while the NH３‐N and theorganic acids contents were affected by the interaction of these factors . The pH values decreased exponentially as fermentationperiod increased ( Figure １a) . However , the pH decreasing rate is lower than those recorded by Pereira et al . (２００７ ) in tropicalgrass silages . It can be attributed to high buffer capacity of legumes as compared to grasses . The butyric ( Figure １b) , aceticand lactic acids contents increased linearly with the fermentation .Figure 1 Estimated values o f p H (a) and buty ric acid content (b) in soybean silages treated with di f f erent additives in sixperiods o f f ermentation .Conclusions The use of microbial inoculants and molasses , associated or not , improves the fermentation quality of soybeansilages . However , the uses of molasses depend on economic factors .ReferencesMcDonald , P . , Hebderson , A .R . , Heron , S .J .E . , １９９１ .The biochemistry of silage . Marlow : Chalcombe Pub . ２０‐４１ .Pereira , O .G . , Rocha , K .D . , Ferreira , C . L . L .F . , 2007 . Composi毕本o quí mica , caracteri za毕本o e quanti f ica毕本o dapopula毕本o de microrganismos em capim‐ele f ante cv . Cameroon ( Pennisetum purpureum Schum .) e suas silagens .Brazialian Journal of Animal Science 36(6) : 1742‐1750 .

Fermentative Profile of Soybean Silages Treated with Molasses and Microbial Inoculant

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Fermentative Profile of Soybean Silages Treated with Molasses and Microbial Inoculant

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