Consumo, degradabilidade e padrão de fermentação ruminal de blocos multinutricionais confeccionados com subprodutos da agroindústria alagoana

Abstract

The objective was to evaluate the consumption, degradability and the ruminal fermentation pattern of multinutritional blocks made with byproducts of Alagoan agroindustry. Three male Santa Inês sheep, castrated, weighing on average 60 kg, were provided with ruminal cannulae. The animals were housed in individual stalls, containing feeder and drinking fountain, with water at will. The diet of the animals was composed of Tifton hay and supplement, in the form of multinutritional blocks. The multinutritional blocks were made according to the methodology described by Emepa, with energetic sources of sweat flour and dehydrated passion fruit peel, besides molasses, minerals and solidifying agent. As a protein source, coconut meal and leaf hay were used in two different native forages, Marmeleiro (Croton sonderianus Muell.Arg), and Malva Branca (Waltheria (indica) douradinha A. St. - Hill)), were distributed in with three animals, three diets and three experimental periods. BM consumption may be considered good, with an average of 145.77 g / animal / day, the dry matter intake was important nutritionally, since the amount of nutrients ingested increased crude protein consumption (CPB) and consumption of neutral detergent fiber (CFDN). There was no statistical significance in the consumption of bulky animals supplemented with BM, when compared to those not supplemented. The multinutritional blocks had a high soluble fraction (A) and effective degradability (DE), with a 5% / h flow rate, not differing from the effective degradability with 8% / h flow rate. The DM degradation curve pattern of BM Malva Branca was similar to BM Marmeleiro. The rate of degradation after incubation was fast, increasing and continuous. At 48 hours, the BM Malva Branca and Marmeleiro had a dry matter degradation rate of 82.19% and 82.83%, respectively. The hay presented a degradation rate of the potentially degradable fraction in the rumen (B) of (42,22%), with a soluble fraction (A) of (18,21%), observing good potential and effective degradation. The degradability of PB of the White Mallow and Marmot WB were similar. BM presented high soluble fraction (A) of PB. The degradation behavior for NDF of BM and Hay indicated that the cell walls of these foods presented a potentially degraded fraction in the rumen (B) of 56.27%; (52.12%) for BM and (49.98%) for hay. The fraction (C) not degraded in the rumen, the (50,02%) and effective degradability (DE) in 8% / h of (50,06%). BM Malva Branca presented a larger fraction (B) of the NDF in relation to BM Marmeleiro. The effective degradability of the hay was 50.06% and the fraction not degraded in the rumen in 50.02% of degradability. The rate of passage at 8% / h with respect to supplementation using BM was found to have no influence on the degradability of Hay. Evaluating ruminal content characteristics, there was no difference in the daily pH evolution between treatments. Treatments that received supplementation with multinutritional blocks presented N-NH3 concentrations higher than 15 mg / dL of N-NH3 at all times studied. At some times of the day, the treatments presented higher concentrations of N-NH3, being the highest values found in the treatment with multinutritional supplementation Malva Branca, which reached 45 mg / dL of N-NH3 at 6 hours. The consumption of multinutritional blocks made with agroindustrial by-products and native forage from the semi-arid region increased the consumption of nutrients from the diet and consequent weight gain by the animal. The multinultritional blocks present high soluble fraction, but with potential as protein sources and energetic in the supplementation of ruminants. BM supplementation did not influence hay degradation. The use of multinutritional blocks seems to have promoted a better ruminal functioning, without sudden drops in pH and the peaks in ruminal ammonia concentration, which occurs in conventional supplementation