Diferentes níveis de inclusão de soja planta inteira em silagem de cana-de-açúcar

Abstract

As an alternative to increase the protein value of silage, the strategy of using leguminous plants such as soybean may be viable, as a reduction of costs with food, because it has high protein content, reducing the need for another source of protein in supplementation. Containing around 17 to 18% oil and 35 to 37% raw protein of high biological value, the soy bean is high in protein and energy contents, with composition in essential amino acids favorable to the animal's nutritional demands. The benefits of the sugar cane are to provide high productivity of green mass (80 to 120 t/ha), reduced cost per MS (dry matter), in addition to its capacity after maturation and harvest period of maintenance of nutritional value up to six months, which becomes compatible with the period of shortage of fodder in pastures. The experiment conducted in the Zootechnic Sector of the Faculty of Agricultural Sciences of the UFGD - Dourados - MS, composed of 5 treatments being control, inclusion of 20% soybean, inclusion of 40% soybean, inclusion of 60% soybean, inclusion of 80% soybean, with 5 silos per treatment, totaling 25 experimental silos. The treatment with 60% soybean inclusion level warmed up more during the evaluation (371.06°C), while the lowest value was observed in 100% soybean silage (319.70°C). The increase in pH values over the hours of exposure is remarkable in all treatments with the sugarcane soybean blend, with less stability then occurring in these treatments. The inclusion of whole plant soy with sugarcane had a quadratic effect on the losses by gases of natural matter (MN) (p≤0,05), where the lowest losses were observed in the inclusion level of 80% (0.784) and 40% (0.907). The level of 80% inclusion of soybean reached 14.51% PB and the level of 60% inclusion of whole plant soybean in sugarcane silage with 13.63% PB giving the characteristic mixed sugarcane silage with inclusion of whole plant soybean of a good nutritional quality food. The levels of the ethereal stratum have also increased and the levels found at the junction of gramineae and legume at the level of 80% (9.09% EE) and 60% (7.18% EE) of soybean inclusion are satisfactory.