Farelo de trigo em substituição ao capim Aruana em silagens à base de palma forrageira na forma de ração completa

Abstract

The objective of this work was to evaluate the fermentation pattern and the bromatological composition of feedstuffs in the form of silage based on forage palm, with addition of wheat bran replacing the aruana grass. The experiment was carried out in the EMEPA-PB Tacima, EMEPA-PB Soledade and in the Laboratory of Forragicultura of the Federal University of Paraíba. The treatments were represented by the levels of addition of wheat bran 0, 5, 10, 20 and 30% based on natural matter (MN), replacing partially or totally aruana grass in the formulation of five rations. The experimental period was 60 days after the ensilage procedure of the material, where the openings occurred after days 0, 7, 15 and one last time 60 days after ensiling. 75 PVC silos were made using the completely randomized delimitation method (DIC) with 5 treatments and 5 replicates. PH, organic acids (AL, AA, AB and AP), fermentative losses (PG, PE and RMS), N-NH3, MS, CT, CHOs and PB. There was no effect (P> 0.05) of the treatments for PB and CHO contents. The DM contents differed (P <0.05), with the lowest values observed for rations 1 and 2 since they contained a higher proportion of wheat bran, and the others did not differ. The buffer capacity of the silages had a significant effect (P <0.05), differing between the rations, varying from 0.10 to 0.8 (No. E.g / 100g DM) values suitable for silages. There was a significant (P <0.05) for N-NH3 values, where higher values were found for silages of rations 1 and 2. There was no effect for PG, PE and RMS (P> 0.05) as well as for AA , AL, AP and AB (P> 0.05) as silage showed the DM content, besides the basic characteristics of the ensiled mass ensure a good fermentation. The pH values reached a range close to the ideal of 7 days post ensiling, with a peak of BAL growth, this fact may be related to the content of CHOs for pH reduction in all five rations. As 5 silages they present a low count of enterobacteria, molds and yeasts. Silages in the form of complete ration based on forage palm and aruana grass substantive adequate resources related to microbiology, without altering the chemical composition, with reduced losses, being able to be characterized as good quality silages, being necessary an evaluation of the conditions of the production system for an appropriate indication.