Impact of replacing soybean meal in beef cattle diets with inactive dry yeast, a sugarcane by-product of ethanol distilleries and sugar mills

Abstract

This study assessed the intake, total and partial apparent digestibility of nutrients, pH, ruminal ammonia concentration, nitrogen efficiency usage, and productive performance of beef cattle fed with different soybean meal replacement levels with inactive dry yeast (IDY 0, 250, 500, 750, and 1000 g/kg). The forage:concentrate ratio was 60:40 and the forage source was corn silage. Concentrates were formulated to comprise 220.0 g/kg CP independent of treatments. In the first experiment (EXP 1), 35 Nelore bulls with an initial average weight of 370 ± 42 kg were distributed across a completely randomized design, with five treatments and seven replicates to assess nutrient intake and performance. EXP 1 lasted 98 days and was divided into a 14-day adaptation period and three experimental periods of 28 days each. In the second experiment (EXP 2), five castrated Nelore steers with an initial average weight of 320 ± 39 kg were fistulated in the rumen and abomasum and distributed in a 5 × 5 Latin square design, balanced for residual effect. The purpose of this experiment was to assess the total and partial digestibility of nutrients, pH, ruminal ammonia nitrogen, and nitrogen efficiency of usage. EXP 2 lasted 90 days, divided into five experimental periods. Each period lasted 18 days and was divided into 10 days for adaptation to the diets and 8 days to collect samples. The intake of dry matter (DMI) decreased linearly (P = 0.03) with increased dietary IDY levels. Conversely, the intake of neutral detergent fiber assayed with a heat-stable amylase and corrected for ash and nitrogenous compounds [aNDFom(n)] in g/day (P = 0.043), and the g/kg body weight (P = 0.011) increased linearly as IDY was added to the concentrate. The experimental diets showed no effect (P > 0.05) on the total and partial apparent nutrient digestibility. IDY had no effect (P > 0.05) on ruminal pH, ruminal ammonia nitrogen, or dietary nitrogen efficiency. Additionally, IDY had no effect on productive performance variables, with the exception of average daily gain (ADG), which decreased linearly (P = 0.028) as IDY was added to the concentrate. IDY addition resulted in decreases

Effects of replacing soybean meal with dried rumen digesta on feed intake, digestibility of nutrients, rumen fermentation and nitrogen use efficiency in Thai cattle fed on rice straw

“…Digestible organic matter intake (DOMI), digestible organic matter fermented in the rumen (DOMR) and metabolizable energy (ME) showed no difference (P40.05) when compared to those on the control diet. These results were in agreement with Campos et al (2014), who reported that inclusion of inactive dry yeast (IDY; a sugarcane by-product of ethanol distilleries and sugar mills) as a substitute for soybean meal in concentrate diets at 100% DM did not altered feed intake in beef cattle. The results indicate that up to 100% of SBM protein can be replaced by DRD without causing a significant reduction in intakes of total feed and nutrients.…”

“…N absorption, N retention and N retention to N intake ratios were unaffected by 100% DRD inclusion in concentrate diet indicated that the nutrient value of DRD is comparable with that of SBM as a protein source for cattle. Earlier study by Campos et al (2014), revealed that replacing SBM in beef cattle diets with 100% IDY were no effect on variables related to dietary N efficiency. Similarly, Rufino et al (2013) observed that the greatest amount of IDY (Saccharomyces cerevisiae) used to substitute SBM resulted in the greatest N utilization in lambs.…”

“…Soybean meal (SBM) has long been considered the best source of supplemental protein in concentrate diets because of its high protein content and great amino acid profile Contents lists available at ScienceDirect journal homepage: www.elsevier.com/locate/livsci (Kondo et al, 2004;∅rskov, 2007;Campos et al, 2014). The increasing price of SBM, alternative protein sources are required to replace SBM in animal diets for sustainable animal production (Südekuma et al, 2004;Tudisco et al, 2010;Rufino et al, 2013;Calabrò et al, 2014).…”

<b>Performance of dairy females fed dried yeast from sugar cane

“…The DM intake is the main nutritional factor responsible for variations in animal production (Crampton et al, 1960) and, since there were no differences in DM intake, performance was also not affected by inclusion levels. Otherwise, according to Campos, Pereira, Ribeiro, Santos and Valadares Filho (2014), increased levels of dried yeast in diets for Nellore bulls resulted in reduced intake and ADG.…”

Optimization of a wet microalgal lipid extraction procedure for improved lipid recovery for biofuel and bioproduct production

“…A clear need is present for alternative protein sources in aquaculture as fish meal production is declining and prices are increasing while fish stocks used for fish meal production are also decreasing (Gatlin et al, 2007;Li et al, 2014;Lum et al, 2013). Interest in alternative protein sources for animal feeds is also growing due to the increasing cost of traditional protein sources such as soybean meal (Campos et al, 2014). Several studies have been performed that illustrate the ability to utilize defatted or lipid extracted algal (or cyanobacterial) biomass as a protein source for animal feed (Becker, 2007;Lodge-Ivey et al, 2014;Lum et al, 2013).The ability to produce a concentrated protein material from algal biomass, while generating feedstock material for additional bioproducts would be an additional advantage rather than using the whole biomass or lipid extracted algal biomass as a protein source.…”