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. 2023 Jan 19;13(3):344.
doi: 10.3390/ani13030344.

In Vitro Study of the Effect of Ensiling Length and Processing on the Nutritive Value of Maize Silages

Ana Gordo  1 , Belén Hernando  1 , Jesús Artajona  1 , Manuel Fondevila  1
Affiliations

In Vitro Study of the Effect of Ensiling Length and Processing on the Nutritive Value of Maize Silages

Ana Gordo et al. Animals (Basel). .

Abstract

The effect of the ensiling length (3, 6, or 9 months), and the processing by dehydration (D) or dehydration and pelleting (P) with respect to the fresh silages (F) were studied in vitro on three maize cultivars in three incubation runs to study the effect of these factors on the nutritive value of maize silage. Gas production pattern, in vitro true digestibility (IVTD), methane concentration (6 and 12 h), ammonia, and volatile fatty acid concentration (VFA) at 12 h were measured. The moisture and pH of F averaged 676 g/kg and 4.09, respectively, and were not affected by the ensiling length, but moisture was reduced, and the pH increased in D and P with respect to F (p < 0.05). The ensiling length did not affect the chemical composition, but differences among the processing forms were detected in a higher acid detergent insoluble nitrogen (ADIN) proportion in P than D, and D than F (p < 0.001). Silages opened at 9 months showed the lowest gas production (p < 0.05), and those that opened after 3 months showed the highest IVTD. The effects of processing on nutrient utilisation only manifested on 3 month silages, with the volume of gas production and IVTD being lower in D than F. However, processing tended (p = 0.064) to reduce the methane proportion at 12 h, indicating both a more efficient fermentation and a lower potential of greenhouse gas emissions compared to the fresh silages. Extending the length of ensiling to 9 months reduced the fermentation of maize silage. The processing increased the dry matter and buffered the feed as well as contributed to an increase in fermentation in 3 month silages.

Keywords: dehydration; in vitro fermentation; pelleting; time of ensiling.

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Conflict of interest statement

The authors declare no conflict of interest.

References

    1. Densley R., Miller D., Kolver E.S. Breaking the feed barrier using maize silage. Proc. N. Z. Grassl. Assoc. 2001;63:289–293. doi: 10.33584/jnzg.2001.63.2418. - DOI
    1. Kleinmans J.J., Densley R.J., Hurley T., Williams I.D., Calvert F. Brief communication: Feed value of maize silage in New Zealand. A review. Proc. N. Z. Soc. Anim. Prod. 2016;76:100–102.
    1. Bolsen K.K. Silage: Basic Principles. In: Barnes R.F., Miller D.A., Nelson J.C., editors. Forages, The Science of Grassland Agriculture. 5th ed. Volume 2. Iowa State University Press; Ames, IA, USA: 1995. pp. 165–177.
    1. Khan N.A., Tewoldeberhan T.A., Zom R.L.G., Cone J.W., Hendriks W.H. Effect of corn silage harvest maturity and concentrate type on milk fatty acid composition of dairy cows. J. Dairy Sci. 2012;95:1472–1483. doi: 10.3168/jds.2011-4701. - DOI - PubMed
    1. Johnson L., Harrison J.H., Hunt C., Shinners K., Doggett C.G., Sapienza D. Nutritive value of corn silage as affected by maturity and mechanical processing: A contemporary review. J. Dairy Sci. 1999;82:2813–2825. doi: 10.3168/jds.S0022-0302(99)75540-2. - DOI - PubMed

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