Valter Harry Bumbieris Junior

Aerobic stability of triticale silage in single culture or in mixtures with oat and/or legumes

The objective of the present study was to evaluate the aerobic stability and losses during the fermentation process of triticale silages in single crop or in mixtures with oats and/or legumes. The following crops were used for silage production: triticale (X. Triticosecale Wittimack), triticale intercropped with forage pea (Pisum arvense) and triticale intercropped with oats (Avena strigosa Schreb), forage pea and vetch (Vicia sativa). The dry matter content and its recovery did not differ among the silages. Buffer capacity was higher for tricale silage intercropped with oats, forage pea and vetch(88.67 m eq. NaOH/100 g DM) followed by triticale intercropped with forage pea (80.80 m eq. NaOH/100 g DM). Electric conductivity values were higher in the intercropped triticale silages. Triticale silage presented the lowest temperatures observed in the silos, and the silages of intercropped triticale silages presented higher heat retention and higher pH values. Silage of triticale intercropped with oats and legumes presented lower aerobic stability but it did not reduce the aerobic stability of the total feed. Dry matter recovery during storage and in stability evaluations in aerobiosis is similar among the silages.

Desempenho, consumo de nutrientes e comportamento ingestivo de cordeiros alimentados com diferentes teores de torta de soja em substituição ao farelo de soja

The objective of this study was to evaluate the effect of replacing soybean meal by soybean cake in diets for feedlot Santa Ines lambs, evaluating performance, nutrient intake, ingestive behavior and biometric measures. Thirty intact males were used, weighing 23.63 ± 2.44kg, distributed randomly in five treatments, with 6 animals each, with the treatments being the levels of substitution of soybean meal for soybean cake, by 0; 25; 50; 75 and 100%. The ingestive behavior was assessed by visual observations every 10 minutes, during 24 hours. No significant effects were found on the parameters of performance, DM intake, and ingestive behavior. The average daily weight gain was 312,73g, and the average dry matter intake was 1,44kg/day. The inclusion of soybean cake led to a significant linear increase in ether extract intake in grams/day, in percentage of body weight and in percentage of metabolic weight. Cubic effects were observed in the parameters of acid detergent fiber intake. The rumination, feed intake and idleness time observed were 425,85; 194,50 e 789,29 min/day, respectively. Regarding biometric measurements, there was no significant effect of replacing soybean meal with soybean cake. The soybean cake can be used in replacement of soybean meal, but is important to pay attention on the content of residual lipids present in this byproduct of the biodiesel industry.