Torta de dendê (Elaeis guineensis) na alimentação de búfalas lactantes em pastejo.

Abstract

The objective was to evaluate the effect of concentrated supplementationanditsreplacement by palm cake on the production and composition of milk, nutrient intakeanddigestibility of buffalo is during lactation under grazing. Five crossbred buffaloes wereused in the middle third of lactation, with a mean live weight of 641.45 ±45.87kg, distributed in a 5×5 Latin square design. The animals from four treatments receivedconcentrated supplementation and one received only mineral supplementation. Thetreatments with concentrated supplementation consisted of four inclusion levels of palmcake in the supplement, being: 0; 30.24; 66.38 and 90.62% of supplement DM. For thetreatment with only mineralized salt (OMS) was fed grass-fed animals. The results weresubmitted to analysis of variance and, subsequently, contrast was tested in which treatment OMS versus treatments with supplementation was tested. Then, it was made an orthogonal decomposition of the sum of squares of treatments with supplementation in contrastsrelative to the effects of linear and quadratic order for the treatments with supplementation, adopting the critical level of 5% probability. There was no difference (P>0.05) inthedrymatter intake (DM) and DM intake of the pasture between the supplemented animals andthe animals OMS treatment. Dry matter intake of supplement, crude protein intakeandtotal digestible nutrient intake showed a linear decreasing effect (P>0.05) with inclusionofthe palm cake in the concentrate. The digestibility of organic matter, crude protein, neutral detergent fiber and the percentage of total digestible nutrients in the diet were higher(P<0.05) for supplemented animals than for animals mineralized salt. The non-fibrouscarbohydrate digestibility showed a linear decreasing effect (P<0.05) with inclusionoflevels of palm oil in the concentrate. The supplemented animals had higher (P<0.05)corrected milk production and percentage of fat and lactose in milk. The variables milkdairy production, proteins and lactose in milk in grams presented linear decreasingeffect (P <0.05) with the inclusion of the palm cake in the concentrate supplement. The supplyofconcentrated supplementation for lactating buffaloes raised on pasture increases theamount of milk fat and milk production corrected for energy. The inclusion of palmcakeinstead of the traditional concentrated ingredients provides a reduction in the intakeof thesupplement and in the milk production.