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Particle size, bacterial inoculation and storage length of corn silage

Grant number: 21/08826-1
Support Opportunities:Scholarships abroad - Research Internship - Doctorate
Effective date (Start): January 15, 2022
Effective date (End): July 14, 2022
Field of knowledge:Agronomical Sciences - Animal Husbandry - Pastures and Forage Crops
Principal Investigator:Luiz Gustavo Nussio
Grantee:Andreia Volpato
Supervisor: Luiz Felipe Ferraretto
Host Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
Research place: University of Wisconsin-Madison (UW-Madison), United States  
Associated to the scholarship:19/27320-1 - Screening of microorganisms with potential for application in the ensiling process, BP.DR


The objective of this study is to evaluate the effects of fineness of grind and bacterial inoculation on fermentation profile, microbial counts, aerobic stability, N fractions, and starch digestibility of high-moisture corn. Experiment will consist of 24 treatments with 4 replicates per treatment (total of 96 mini-silos). Treatments will be a combination of 2 fineness of grind (finely- and coarsely-ground), and 3 microbial inoculants (distilled water, homofermentative and heterofermentative microbial inoculants), and 4 fermentation lengths (7, 15, 30 and 120 d). Furthermore, a 0 d treatment will be prepared for analysis of N fractions and starch digestibility (in situ). Treatments will be ensiled in vacuum sealed plastic pouches containing 2 kg of forage. Silos will be weighed at closing and opening to estimate DM loss. After silo opening, subsamples will be used to determine dry matter concentration, pH, organic acids, alcohols, ammonia-N, mold and yeast counts, aerobic stability, CP, soluble CP, starch, and starch digestibility. Fresh samples for each particle size will be analyzed in duplicate for characterization. (AU)

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