Laboratory procedure to determine protein digestibility of heat-treated feedstuffs for dairy cattle

McNiven, Mary A.; Prestløkken, Egil; Mydland, Liv Torunn; Mitchell, Andrew

doi:10.1016/s0377-8401(01)00340-6

Cited by 16 publications

(24 citation statements)

References 20 publications

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“…The intestinal digestibility of legume seeds and diet protein and their undegradable fractions was determined according to both the three step in situ‐in vitro procedure of Calsamiglia and Stern (1995) and the in vitro procedure of McNiven et al. (2002).…”

Section: Methodsmentioning

confidence: 99%

“…Ruminal disappearance of feed protein is an essential factor for assessing the feed protein value according to modern systems for feed evaluation in ruminants (AFRC, 1993; NRC, 2001). In addition, the benefit of any feed protein in ruminants depends on the protein digestion in the small intestine (Calsamiglia and Stern, 1995; McNiven et al., 2002). The rumen degradability of the protein is usually stated by using the in situ method, which may be influenced by particles lost through the bag pores.…”

Section: Introductionmentioning

confidence: 99%

“…With regard to the intestinal digestibility of the rumen undegradable protein (IDRUP), the mobile bag technique has been the most extensively used (Hvelplund et al., 1992; Madsen et al., 1995). However, the cost and ethical considerations concerning fistulated animals has led to the development of in vitro methods (Calsamiglia and Stern, 1995; McNiven et al., 2002).…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the effect of particle losses on the protein rumen degradation profiles was studied. A in situ‐in vitro technique (Calsamiglia and Stern, 1995) was compared with an in vitro technique (McNiven et al., 2002) for estimating intestinal digestibility. Apparent nutrient digestibility of diets including those legume seeds was determined in goats as well.…”

Section: Introductionmentioning

confidence: 99%

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Nutritive evaluation of legume seeds for ruminant feeding

Ramos-Morales

Sanz-Sampelayo

Molina-Alcaide

2010

Journal of Animal Physiology and Animal Nutrition

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Chemical composition, rumen degradability and the effect of particle losses, and intestinal digestibility of protein by using in situ-in vitro and in vitro techniques were stated for beans (Vicia faba), lupin (Lupinus albus), vetch (Vicia sativa) and bitter vetch (Vicia ervilia) and four diets including those legume seeds. In addition, the apparent digestibility of experimental diets was determined in goats. The legume seeds showed high protein content (206-319 g/kg dry matter). Effective degradability of protein for legumes and diets varied from 0.80 to 0.87 and 0.76 to 0.82, respectively, decreasing to 0.53-0.76 and 0.61-0.67, respectively, when particle loss was taken into account. Different intestinal digestibility values were obtained with both methodologies without significant relationship between them (y = 1.058-0.463x; R(2)=0.068; RSD = 0.140; p = 0.53). There were no differences in the apparent nutrients and energy digestibility among diets (p > 0.05). These legumes can supply rapidly degradable protein for microbial protein synthesis and contribute to the pool of amino acids available for the synthesis of milk protein and for retention in the body.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nutritive evaluation of legume seeds for ruminant feeding

Ramos-Morales

Sanz-Sampelayo

Molina-Alcaide

2010

Journal of Animal Physiology and Animal Nutrition

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“…The effectiveness of the heat treatment depends on the time and temperature applied, but the optimal conditions vary with the protein concentrate (Broderick et al, 1991;McNiven et al, 2002). Thus, Calsamiglia and Stern (1995) observed a decrease of intestinal digestibility by heating the soybean meal at 165°C for more than 2.5 h, whereas milder heating resulted in an increase of protein digestibility.…”

Section: Implications and Methodsmentioning

confidence: 99%

Ruminal degradation of protein : implications for polluting emissions

Ruiz¹,

Leonardo²

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The effect of pistachio by‐product extracts treatment in protecting soybean meal and canola meal protein from rumen microbial degradation

2020

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BACKGROUND: The industrial de-hulling of fresh pistachio generates a large quantity of pistachio by-products (PBP). The present study aimed to investigate the effects of treating soybean meal (SBM) and canola meal (CM) with tannin extracts derived from PBP on the protein fractions according to the Cornell Net Carbohydrates and Protein System (CNCPS), rumen degradability, and ruminal and post-ruminal crude protein (CP) disappearance in an in situ trials using three fistulated steers. The extracts of PBP were obtained via different solvents and then added to SBM and CM, so that the final concentrations of added tannins were 0, 5 and 10 g kg −1 dry matter. RESULTS: The CNCPS soluble proteins (fractions A + B 1) of CP and B 1 fraction of CP were lower (P < 0.01) in SBM and CM treated with PBP extracts than untreated meals. Treating SBM with different PBP extracts (except 5 g kg −1 tannin water extract) and CM with 5 g kg −1 tannin water extract and 10 g kg −1 tannin ethanol extract decreased (P < 0.01) ruminal disappearance of CP. From the in situ results, the rapidly degradable fraction (a) of CP decreased (P < 0.01) by treating SBM with different PBP extracts and CM with 5 and 10 g kg −1 tannin water extracts, whereas the slowly degradable fraction (b) of CP remained unchanged in SBM. Treatment of SBM and CM with PBP extracts decreased (P < 0.01) the effective degradability of crude protein estimated with different outflow rates. CONCLUSION: Some of the tannin extracts derived from PBP by water, ethanol and methanol could be effective with respect to protein protection of SBM and CM from degradation in the rumen; however, the use of tannin from water extracts can be more economical and practical.

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Laboratory procedure to determine protein digestibility of heat-treated feedstuffs for dairy cattle

Cited by 16 publications

References 20 publications

Nutritive evaluation of legume seeds for ruminant feeding

Nutritive evaluation of legume seeds for ruminant feeding

Ruminal degradation of protein : implications for polluting emissions

The effect of pistachio by‐product extracts treatment in protecting soybean meal and canola meal protein from rumen microbial degradation

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