Effect of organic acids on numbers of yeasts and mould fungi and aerobic stability in the silage of corn

• Autorzy: Selwet M.
• Języki publikacji: EN

Abstrakty

EN

The aim of these studies was to assess the effect of chemical conservants (FA = formic acid, PA = propionic acid, FPA+i = formic acid, propionic acid and ammonium ions) on the cell counts of yeasts and mould fungi in silage. The silage was prepared from corn (Zea mays L), cultivar Buran FAO (240). The effect of the applied conservants on silage aerobic stability was also assessed. The performed chemical analyses comprised the determination of: the content of dry matter (DM), lactic acid (LA), acetic acid (AA), ethanol, water soluble sugars (WSC), crude protein (CP) and pH. The applied preparations were found to reduce the number of yeast and mould fungi cells in all the examined silages. The growth of fungi was inhibited most strongly by the FPA+i preparation (containing a mixture of formic and propionic acids and ammonium ions). The yeast cell counts dropped (P«0.05) from 8.50 107 CFU g-1 silage in the control (CCS = control corn silage) to 2.60 107 CFU g' in silage treated with FPA+i, whereas counts of the mould fungi cells - from 15.20 104 CFU g-1 silage in the control to 4.60 104 CFU g-1 in silage treated with FPA+i. The applied conservants increased (P«0.05) the content of DM from 255.00 g • kg 1 in control to 266.60 g • kg-1 with PA, WSC from 27.10 g • kg 'DM to 30.50 g • kg -1DM with FPA+i and ethanol from 9.10 g • kg 'DM to 11.21 g • kg -1DM with FPA+i in the silage. The additives decreased concentrations of lactic acid, acetic acid and crude protein concentration after opening the barrels. The diversifying factors decreased the pH value in the examined silage. The experimental conservants were found to improve the aerobic stability of silages after 7 days of air exposure.

Słowa kluczowe

EN

corn; silage; organic acid; yeast; mould fungi; aerobic stability; feed

• Wydawca: -
• Czasopismo: Polish Journal of Veterinary Sciences
• Rocznik: 2008
• Tom: 11
• Numer: 2
• Opis fizyczny: p.119-123,fig.,ref.

Twórcy

autor

Selwet M.

• August Cieszkowski Agricultural University in Poznan, 60-656 Poznan, Poland

Bibliografia

• AO AC (1990) Official Method of Analysis, 15th ed., Washin­gton, DC.
• Clarke AF (1998) Mycology of silage and mycotoxicosis. In: Stark BA, Wilkinson JM (eds) Silage and Helth. Chal- combe Publications, Marlow Bottom, Bucks, pp 7-18.
• Creppy E (2002) Update of survey, regulation and toxic ef­fects of mycotoxins in Europe. Toxicol Letter 127: 19-28.
• Driehuis FSJWH, Oude-Elfering S (2000) The impact of the quality of silage on animal health and food safety: a re­view. Vet Quart 22: 212-216.
• Haigh PM (1998) Effect of additives on grass silage fermen­tation and effluent production, and on intake and live- weight chance of young cattle. J Agric Engng Res 69: 141-148.
• Kleinschmit DH, Schmidt RJ, Rung JrL (2005) The effects of various antifungal additives on the fermentation and aerobic stability of corn silage. J Dairy Sci 88: 2130-2139.
• Kostulak-Zielińska M, Potkański A, Przybylski M, Selwet M, Perkowski J (2002) Hygienic value of corn silage with a chemical preservative. Med Weter 58: 792-795.
• Rung JrL, Robinson JR, Ranjit NR, Chen JH, Golt CM (2000) Microbial populations, fermentation end prod-ucts, and aerobic stability of barley silage. J Dairy Sci 83: 1479-1486.
• Kung JrL, Myers L, Neylon JM, Taylor CC, Lazartic J, Mills JA, Whiter AG (2004) The effects of buffered propionic acid-based additives alone or combined with microbial inoculation on the fermentation of high moisture corn and whole-crop barley. J Dairy Sci 87: 1310-1316.
• Me Donald P, Henderson AR (1964) Determination of water-soluble carbohydrates in grass. J Sci Food Agric 15: 395-398.
• Mills JA, Kung LJr (2002) The effect of delayed ensiling and application of propionic acid-based additive on the fer­mentation of barley silage. J Dairy Sci 85: 1969-1975.
• Nadeau EM, Russel JR, Buxton DR (2000) Intake, digesti­bility, and composition of orchard grass and alfalfa silages treated with cellulase, inoculant and formic acid fed to lambs. J Anim Sci 78: 2980-2989.
• Nishino N, Wada H, Yoshida M, Shiota H (2004) Microbial counts, fermentation products, and aerobic stability of whole crop corn and a total mixed ration ensiled with and without inoculation of Lactobacillus casei or Lactobacil­lus buchneri. J Dairy Sci 87: 2563-2570.
• SAS Institite Inc(1999) SAS/STAT User’s Guide, Version 8, Cary, NC: Institite Inc.
• Selwet M (2005) Effects of preservatives based on formic acid on the development of yeasts and mould fungi in silages. Med Weter 61: 349-352.
• Selwet M (2006) Effect of organic acids and bacterial- -enzymatic preparations on number of fungal popula­tions and silage aerobic stability. Bull Vet Inst Pulawy 50: 215-220.
• Steidlova S, Kalac P (2002) Levels of biogenic amines in maize silages. Anim Feed Sci Tech 102: 197-205.