Tempo de emurchecimento e inoculante bacteriano-enzimático sobre o perfil fermentativo, estabilidade aeróbica e valor nutricional da silagem de capim-BRS capiaçu

Abstract

The adequate wilting time of Capiaçu BRS grass associated with the use of bacterial-enzymatic inoculant in the semi-arid region is still little known. Based on the above, the objective was to evaluate the best wilting time of Capiaçu BRS grass associated with bacterial-enzymatic inoculant on the fermentative and nutritional characteristics of silage in the semi-arid region. Four wilting times (control, 6, 24 and 30 hours) were evaluated, associated or not with the presence of bacterial-enzymatic inoculant, following a completely randomized design in a split plot scheme with eight replications. For the ruminal degradability test, a randomized block design was used in a split plot scheme with four replications. There was no interaction between the wilting times and the presence or absence of the inoculant on the pH (P = 0.57), ammoniacal nitrogen (N-NH3; P = 0.16) and aerobic stability (P = 0.72) of the BRS Capiaçu silage. Aerobic stability linearly reduced 1.2 hours for each hour increased in the forage wilting time. There was an interaction between the wilting times and the presence or absence of the inoculant on the levels of malic acids (P<0,01), succinic acid (P<0,01), lactic acid (P <0.01) and acetic acid (P <0.01). The presence of the inoculant in the silage increased by 3.63%, 6.13%, 7.73%, 6.39% and 9.97% in the dry matter content (P = 0.01), ash (P<0,01), crude protein (P = 0.05), insoluble neutral detergent fiber and total carbohydrates (P = 0.02) in relation to the treatment without inoculant. The wilting of BRS Capiaçu grass harvested with 100 days of regrowth for silage in up to 30 hours associated with the application of the enzymatic-bacterial inoculant benefits the silage.