Naslov
Influence of different silage additives on conservation parameters during high moisture corn silage production of diverse corn hybrids

Autori
Duvnjak, Marija ; Kiš, Goran ; Grbeša, Darko

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
6th Croatian Congress of Microbiology with International Participation / Antolović, Roberto - Zagreb : Hrvatsko mikrobiološko društvo, 2016, 80-80

ISBN
978-953-7778-12-2

Skup
6th Croatian Congress of Microbiology with International Participation

Mjesto i datum
Sveti Martin na Muri, Hrvatska, 15.06.2016. - 18.06.2016

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
silage production; conservation parameters; inoculant; lactic acid

Sažetak
In silage production, lactic acid bacteria (LAB) additives are widely used to optimize fermentation and thereby maximize lactic acid production, quickly reduce pH, and preserve nutrients. The purpose of the study was to investigate the effect of LAB and lactic acid application on high moisture corn conservation parameters [dry matter (DM), lactic acid (LA), titratable acidity (TA), pH, crude protein (CP), soluble crude protein (sCP) and ammonia] during one year ensiling period. Hybrids (Bc 513 pc, Bc 462 and Bc 344) were grown in 2013 under the same production conditions in split- plot experimental fields at the Faculty of Agriculture of the University of Zagreb. Each hybrid was grown in five replicates. Silages where ensiled at the black layer stage of growth (67.61% – 72.42% DM) in laboratory scale bag silos with one part ensiled with Bio-Sil LAB inoculant (Lactobacillus plantarum DSM 8862 and DSM 8866) in a concentration 300000 CFU/g of fresh material, second one was left untreated while the third was treated with lactic acid (linear application 5 ‒ 15 g/kg DM). Silages were sampled at the beginning and on 15th, 48th, 98th, 182nd, 274th and 364th day of ensiling. DM value showed significant but numerically low change during ensiling (69.11 ‒ 71.04 %). The hybrid tested had no influence on LA content, pH value or TA in silages. However, the use of inoculant and lactic acid was associated with higher LA content (inoculant: 12.63 g/kg DM ; lactic acid: 8.55 g/kg DM ; control: 7.14 g/kg DM ; P < 0.001), faster pH reduction (inoculant: 6.45 ‒ 4.03 ; lactic acid: 6.45 ‒ 4.17 ; control: 6.45 ‒ 4.35 ; P < 0.001) and higher TA (inoculant: 0.57 meq/g DM ; lactic acid: 0.51 meq/g DM ; control: 0.51 meq/g DM ; P < 0.05) compared to control silages. CP content in silages, between the tested hybrids, differed significantly with the highest values observed in Bc 513 pc and lowest in Bc 344 (Bc 513 pc: 133 g/kg DM ; Bc 344: 105.6 g/kg DM ; Bc 462: 109.8 g/kg DM). The same trend was observed with sCP and ammonia contents even though they responded differently to additive application in diverse hybrids. The sCP and ammonia content showed increase during ensiling (sCP: 17.9 ‒ 47.0 % CP ; ammonia: 0.38 ‒ 3.73 % CP ; P < 0.001) thus presenting the evidence of proteolysis in silages. In conclusion, both types of silage additives used in this study improved silage fermentation characteristics when compared to control silages regardless of the hybrid used.

Izvorni jezik
Engleski

Znanstvena područja
Biotehnologija

POVEZANOST RADA