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Animal Breeding and Genetics
Asian-Australasian Journal of Animal Sciences 2003;16(12): 1738-1742.
DOI: https://doi.org/10.5713/ajas.2003.1738    Published online January 1, 2003.
The Influences of Addition of Sugar with or without L. buchneri on Fermentation and Aerobic Stability of Whole Crop Maize Silage Ensiled in Air-stress Silos
Guan Wu-Tai, F. Driehuis, P. Van Wikselaar
The whole plant of crop maize was chopped and ensiled in double-layered polyethylene bags to determine the influence of residual sugar on the fermentation of lactic acid and aerobic stability by L. buchneri in whole crop maize silage made in air-stress condition. There were a total of six treatments used in this experiment as follow: added 25 g de-mineralised water per kg chopped maize serving as control (con), 37.5 g glucose solution containing 12.5 g glucose (g1), 75 g glucose solution containing 25 g glucose (g2), 25 g, L,.buchneri suspension intended for 106 cfu g-1 (L.b.), g1+L.b. and g2+L.b. All silos were opened at day 91 after ensiling for measuring the pH values, microbiological enumeration, fermentative products and aerobic stability. The dry matter loss increased significantly (p<0.01) due to inclusion of sugar or L. buchneri. The lower lactic acid concentrations were observed (p<0.01) in silages inoculated with L. buchneri only or in combination with sugar addition than the correspondent uninoculated silages. Compared with control silage, ethanol production was about 3 or 6-fold higher due to addition 12.5 or 25 g glucose per kg chopped maize at ensiling. The silages added with sugar contained less acetic acid concentration (p<0.01) than control, but silages inoculated with L. buchneri showed the contrary effects (p<0.01) at different sugar levels. No butyric acid was found in uninoculated silages, silages inoculated with L. buchneri. producted more propionic acid, 1-propanol and butyric acid. Lactic acid bacteria counts increased markedly (p<0.01) due to inoculation with L. buchneri, whereas it was reduced (p<0.01) by added sugar. No significant difference was observed in count of yeast, but inoculation with L. buchneri shows a decreasing trend. Mould count in all silages was less than 2 (log cfu g-1). The added sugar had negative effects on aerobic stability of maize silage made under air-stress conditions, whereas inoculation with L. buchneri improves (p<0.01) the aerobic stability.
Keywords: Maize Silage; L. buchneri; Sugar; Fermentation; Aerobic Stability

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