Intake and digestion by wethers fed a tropical grass-based diet supplemented with increasing levels of canola meal

Hentz, Fernanda; Kozloski, Gilberto Vilmar; Orlandi, Tiago; Ávila, Suélen; Castagnino, Pablo S.; Stefanello, C.; Pacheco, Gabriel Faria Estivallet

doi:10.1016/j.livsci.2012.04.007

Cited by 12 publications

(8 citation statements)

References 29 publications

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“…This is not inconsistent with the current results because in the present study, replacing SBM with RSM or FS had no effect on diet digestibility coefficients, probably because lipid metabolism is highly variable owing to many factors, such as the nature and concentration of lipids in the diet (Fiorentini et al, 2013). Furthermore, in line with the current results, Hentz et al (2012) reported that feeding wethers with increasing levels of RSM (up to15 g/kg of bodyweight) had no effect on diet NDF digestibility. On the other hand, Gilbery et al (2007) reported that replacing RSM with PS positively affected the diet's ADF digestibility, which is in contrast with the current results, possibly because the animals in the current study were fed at maintenance level, and the digestibility of nutrients did not compromise nutrient demand at this level.…”

Section: Discussionsupporting

confidence: 82%

Effects of replacing soybean meal with alternative sources of protein on nutrient digestibility and energy value of sheep diets

Zagorakis¹,

Liamadis²,

Milis³

et al. 2018

SA J. An. Sci.

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The study determined the potential of eight locally produced protein sources to replace soybean meal (SBM) in the diet of sheep. Three in vivo digestibility trials were conducted using a Latin square (3x3, 4x4 and 4x4) experimental design with castrated Chios rams. The authors estimated nutrient digestibility coefficients and energy value of diets with soybean meal (control), lupin seeds (LS), rapeseed meal (RSM), sunflower meal (SFM), fababean seeds (FBS), vetch seeds (VS), pea seeds (PS), flaxseeds (FS), and chickpea seeds (CS). The results showed that the SBM, RSM, and PS diets had similar nutrient digestibility and energy value. The SFM diet had lower organic matter (OM) digestibility than the SBM diet. The FS and SFM diets had similar crude protein (CP) digestibility to the SBM diet. Additionally, FS, VS, and SBM diets had similar energy value. Furthermore, SBM, SFM, VS and FS diets had similar dry matter (DM), neutral detergent fibre (NDF), hemicelluloses, and cellulose digestibility coefficients. The SBM, LS, FBS, and CS diets had similar DM, OM, NDF, hemicelluloses, and cellulose digestibility coefficients. Additionally, SBM, LS, and CS diets had similar energy value. This study reveals that diets with RSM, PS, FS, and LS, compared with diets with SBM, did not have adverse effects on nutrient digestibility and energy value. These results tend to support the idea that some locally available protein sources seem to have the potential to replace SBM in sheep diets.

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Section: Discussionsupporting

confidence: 82%

Effects of replacing soybean meal with alternative sources of protein on nutrient digestibility and energy value of sheep diets

Zagorakis¹,

Liamadis²,

Milis³

et al. 2018

SA J. An. Sci.

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“…The concentration of α -amino N in rumen fluid and duodenal filtrates was analysed using a non-automated colorimetric method adapted from Palmer & Peters (1969) as described by Hentz et al . (2012). For individual amino acid analysis, feed and duodenal dried samples were hydrolysed with 6 N HCl solution containing 3 g/l of phenol during 24 h at 110 °C.…”

Section: Methodsmentioning

confidence: 99%

Impact of a tannin extract on digestibility, ruminal fermentation and duodenal flow of amino acids in steers fed maize silage and concentrate containing soybean meal or canola meal as protein source

et al. 2015

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Four Holstein steers (297 ± 56 kg of body weight (BW)) fitted with duodenal cannula and rumen catheter, were housed in metabolism cages and used in a 4 × 4 Latin Square trial to evaluate the effect of both protein source and Acacia mearnsii tannin extract on digestibility, ruminal fermentation, rumen microbial protein synthesis, N utilization and on duodenal flow of individual amino acids. The diet was offered at restricted amount of 25 g of dry matter (DM)/kg BW and consisted of maize silage plus concentrate, in a proportion of 0·7:0·3 (DM basis) respectively. Concentrate was formulated with either soybean meal or canola meal as protein source, with or without 50 g/ kg of A. mearnsii tannin extract (i.e. 15 g/kg of total dietary DM). There was no effect of protein source on most variables. The apparent and true organic matter (OM) digestibilities, as well as neutral detergent fibre (NDF) digestibility were negatively affected by tannin extract inclusion without, however, affecting digestible OM intake. The amount of nitrogen (N) excreted in faeces increased whereas the urinary N excretion decreased in tannin extract treatments. No interaction time × treatment was detected for any rumen variable and no treatment effect was observed for rumen fluid pH and reducing sugars concentration. Rumen fluid concentration of ammonia N was lower for the canola meal plus tannin extract treatment. Rumen concentration of α-amino compounds was not affected by tannin extract but was higher when canola meal was the protein source. The duodenal flow of OM, total N, α-amino N and non-ammonia non-microbial N increased with tannin extract inclusion, whereas the duodenal flow of microbial N was not affected by treatment. For both protein sources, the amount of most individual amino acids flowing to the duodenum increased due to tannin extract addition. In conclusion, the dietary inclusion of 15 g/kg DM of tannin extract from A. mearnsii improved the amino acid supply independently of whether the protein source was canola meal or soybean meal, without affecting the amino acid profile, to steers fed maize silage plus concentrate, with a minor but significant impact on OM digestibility.

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“…In the CNCPS, the metabolizable protein depends on digestion and passage rates and fractions such as soluble protein, ammonia, neutral detergent insoluble protein, and acid detergent insoluble protein (Higgs et al, 2015). Highly degradable true protein sources improve energy and amino acid supplies for ruminants grazing tropical forages, but their presence in the diet increases N excretion (Hentz et al, 2012). The highly available NPN and N compounds of rapid rumen degradation result in peaks of ammonia concentration in the rumen much before the peak of fermentation of the potentially digestible fraction of fibrous carbohydrates (Van Soest, 1994;Russell, 2002).…”

Section: Introductionmentioning

confidence: 99%

Kinetics of digestion of low-quality forage grazed by beef cattle fed supplements containing increasing levels of rumen undegradable protein

et al. 2016

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-This experiment was conducted to evaluate the degradation kinetics and microbial efficiency of beef cattle grazing on low-quality forage and receiving supplements with different levels of rumen undegradable protein (RUP). The animals grazed on palisade grass pasture solely or this pasture and supplement containing 40 or 60 g of RUP per 100 g of crude protein (CP). The degradation profiles of neutral detergent fiber, fiber carbohydrates, and neutral detergent insoluble protein were interpreted kinetically by using a decreasing logistic model. Treatments (no supplement, or RUP at 40 or 60 g −1 100 g CP) did not affect rumen fill; however, the increase in the indigestible fiber carbohydrate fraction that occurred at the expense of the digestible fiber carbohydrate fraction resulted in a greater rumen fill effect. The palisade grass showed a significant proportion of its nitrogen in the form of slowly degradable protein as neutral detergent insoluble protein, which amounted to 26 g per 100 g CP. Supplementation with 40 g of RUP per 100 g CP decresead the indigestible fraction of the low-quality forage. However, the absence of a rumen-fill effect demonstrates that the additional supply of nutrients contributes greatly to increasing growth efficiency and use of the available energy from the forage by the ruminal microorganisms.

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Intake and digestion by wethers fed a tropical grass-based diet supplemented with increasing levels of canola meal

Cited by 12 publications

References 29 publications

Effects of replacing soybean meal with alternative sources of protein on nutrient digestibility and energy value of sheep diets

Effects of replacing soybean meal with alternative sources of protein on nutrient digestibility and energy value of sheep diets

Impact of a tannin extract on digestibility, ruminal fermentation and duodenal flow of amino acids in steers fed maize silage and concentrate containing soybean meal or canola meal as protein source

Kinetics of digestion of low-quality forage grazed by beef cattle fed supplements containing increasing levels of rumen undegradable protein

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