Tatiane Fernandes

Microbiological profile and aerobic stability of Tifton 85 bermudagrass silage with different additives

The objective of this study was to evaluate the microbiological profile and aerobic stability of silage with Tifton 85 bermudagrass and different additives and wilting. The studied treatments were: pre-drying in the sun for two hours before ensiling; use of bacterial-enzymatic inoculant; addition of soybean peel; addition of corn grits and use of salt in the surface layer of the silo. The experimental design was completely randomized with six treatments and four replications. Plants of Tifton 85 bermudagrass with 38 days were ensiled in experimental silos with Bunsen valves, with compacting density of 236 kg silage per m3 for Tifton 85 bermudagrass, which was pre-dried in the sun; the average silage was 294 kg m-3 for the other treatments. The ratios between soybean hulls and corn grits, added to the silage, were calculated based on the initial DM content from Tifton 85 bermudagrass in order to obtain 320 g/kg DM of the material to be ensiled. There was an increase of lactic bacteria and Clostridium as well as an absence of enterobacteria after the silo opening. Fungi developed only in Tifton 85 bermudagrass and its treatments before the ensilage and yeasts developed in silages of Tifton 85 bermudagrass when they received soybean hulls or corn grits after silo opening. There was no breach regarding aerobic stability of silages during the studied period. The pH reached the highest values within 48 hours after opening the silos, but there were variations during this period.

Changes in tifton 85 bermudagrass hay storage in the field or under shed

The variations of chemical composition, and occurrence of fungi in Tifton 85 bermudagrass hay stored in the field or under shed for 30 days were evaluated. The desing used was completely randomized design with plots subdivided by time with two storage systems, four assessment periods. After 30 days, crude protein was reduced and acid detergent insoluble protein (ADIP) contents increased, with low occurrence of fungi Aspergillus, Rizophus, and Cladosporium and high occurrence of Geotrichium, Phoma, Penici- llium, and Diploccocum.

Características da silagem de resíduo úmido de fécula de mandioca adicionada de níveis de ureia

This study aimed to evaluate the nutritive and microbiological composition and fermentation changes in the residue of wet cassava starch (RWCS) ensiled with different levels of urea. The experimental design was a randomized split plot 4x2, with four levels of urea added in the residue of wet cassava starch (0, 5, 10, 15 and 20 g/kg as fed) allocated to plots, and the sampling positions in the silo (superficial and intermediate) allocated to the subplots. The RWCS was ensiled in air circular concrete silos with approximately 1000 kg of capacity. Urea was added to RWCS between layers at the time of ensiling and the material was kept ensiled for a period of 45 days. After the fermentation period, the silos were opened and samples were collected for the determination of temperature, pH, total nitrogen, ammonia, dry matter, mineral matter, organic matter, crude protein, neutral detergent fiber (NDF), acid detergent fiber (ADF), cellulose, hemicellulose and lignin, and the population of fungi and yeasts, lactic acid bacteria and Clostridium. The urea addition to the level of 20 g/kg as fed silage for the residue of wet cassava starch with approximately 18 % of DM increases the pH, total N, NH3-N, crude protein, NDF and ADF of silage. However, this addition reduce the populations of lactic acid bacteria, fungi, yeasts and the total population of microorganisms without altering the content of dry matter, hemicellulose, cellulose and lignin.

Alterações no feno de campim tifton 85 armazenado à campo ou galpão coberto

The variations of chemical composition, and occurrence of fungi in Tifton 85 bermudagrass hay stored in the field or under shed for 30 days were evaluated. The desing used was completely randomized design with plots subdivided by time with two storage systems, four assessment periods. After 30 days, crude protein was reduced and acid detergent insoluble protein (ADIP) contents increased, with low occurrence of fungi Aspergillus, Rizophus, and Cladosporium and high occurrence of Geotrichium, Phoma, Penicillium, and Diploccocum.