Replacement of soybean meal by cottonseed meal 38% in multiple supplements for grazing beef heifers

Abstract

-The objective of this work was to evaluate the effect of using multiple supplements with different levels of cottonseed meal 38% on intake, total apparent digestibility of dietary components, efficiency of microbial synthesis and productive performance of beef heifers in Brachiaria decumbens pasture during the rainy season. It was used 25 Nellore heifers and 10 crossbred heifers with predominance of Zebu breed at 16 months of age and with 249.8 ± 0.6 kg of body weight. It was used a complete random experimental design with five treatments and seven replicates. Supplements contained approximately 30% of crude protein (CP) and soybean meal replaced by cottonseed meal 38% at the levels 0; 33; 67 and 100%, (CS 0 , CS 33 , CS 67 and CS 100 , respectively) evaluated in relation to a control group, which received only mineral mixture (MM) ad libitum.Daily weight gain was 397, 546, 570, 525 and 542 g, respectively, for the groups MM, CS 0 , CS 33 , CS 67 and CS 100 . There was no effect of the levels of cottonseed meal 38% on daily weight gain, which differed among animals fed supplement and control group, however. Intakes of crude protein and non-fibrous carbohydrates (NFC) in kg/day were greater in groups under supplementation. Coefficients of total apparent digestibility of CP and NFC were greater in animals fed supplements in relation to the control group. Increase on the replacement level of soybean meal by cottonseed meal had a positive linear effect on coefficients of total apparent digestibility of DM, organic matter and CP. There was no difference on microbial efficiency, expressed as g of crude protein per kg of TDN consumed by the animals under supplements and the ones of the control group, neither it was observed difference among levels of replacement of soybean meal by cottonseed meal. The use of cottonseed meal 38% replacing soybean meal in the diet does not harm performance of grazing beef heifers.

Nitrogen balance, microbial protein synthesis and ingestive behavior of lambs fed diets containing cottonseed cake in substitution of soybean meal

“…Additionally, Barros et al (2011), evaluating the replacement of soybean meal by cottonseed meal in multiple supplements for beef heifers grazing, observed that the use of cottonseed meal did not cause differences from microbial nitrogen and and microbial efficiency, but the authors found that there was a linear decrease in fecal nitrogen excretion with the inclusion of cottonseed meal, and concluded that cottonseed meal in supplements to heifers grazing produces similar productive results regarding the use of soybean meal.…”

Diferentes suplementos na terminação de bovinos Nelore em pastagem diferida de Brachiaria decumbens no período da seca

“…BArros et al (2011) Quando se trata da influência do tipo de suplemento utilizado sobre o RCQ, no período da seca, ocorre um consenso por diversos autores de que as fontes utilizadas para compor os suplementos não alteram significativamente o resultado, se o tipo de suplemento for semelhante sAntos et al, 2002;detmAnn et al, 2004). Assim, na suplementação das pastagens com concentrado na seca, o desempenho dos bovinos está relacionado ao balanço adequado dos nutrientes no suplemento (PAulino et al, 2000).…”

Parâmetros nutricionais e produtivos de bezerras suplementadas a pasto com diferentes fontes de alimentos protéicos

“…A suplementação com suplementos múltiplos na maioria dos casos melhora a digestibilidade dos componentes da dieta por fornecer os substratos necessários para os microrganismos do rúmem, e com isto bactérias fibroliticas aumentariam em número e capacidade de degradação da fibra. No presente trabalho houve maior (P<0,10) digestibilidade do CNF em animais suplementados; possivelmente este aumento foi devido à presença de compostos mais facilmente digeríveis na dieta dos animais que receberam suplemento múltiplo e ao efeito da menor proporção da fração metabólica fecal em relação ao nutriente ingerido nos animais que receberam suplementos múltiplos (CABRAL et al, 2006;BARROS et al, 2011). Na Tabela 5 estão expostas as estimativas dos coeficientes de digestibilidade aparente total dos componentes das dietas recebidas em função do suplemento fornecido aos animais.…”