The effects of feeding level and roughage/concentrate ratio on the measurement of protein degradability of two tropical forages in the rumen of goats, using the nylon bag technique

Zhao, Jing Yang; Shimojo, Masataka; Goto, Ichiro

doi:10.1016/0377-8401(93)90001-z

Cited by 17 publications

(18 citation statements)

References 11 publications

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“…This is shown by the low variation in situ OM and fibre degradation of some forage (Aitchison et al, 1986). Contrary, protein degradability seems to increase when intake decreases, as revealed by direct measurements of non-microbial protein duodenal flows in sheep (Merchen et al, 1986) or by in situ ruminal measurements in goats (Zhao et al, 1993). There is a clear negative relationship between levels of intake and ruminal retention time of particles in the rumen of sheep and cattle as well, whatever the percentage of concentrate is given in the ration (Grimaud et al, 1998;Doreau et al, 2003).…”

Section: Intake Of Nutrientsmentioning

confidence: 98%

Utilization of nutrients as influenced by different restriction levels of feed intake under sub-tropical conditions in crossbred calves

et al. 2008

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Section: Intake Of Nutrientsmentioning

confidence: 98%

Utilization of nutrients as influenced by different restriction levels of feed intake under sub-tropical conditions in crossbred calves

et al. 2008

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“…16 In a diet with high neural stem cell (NSC) and rumen degradable protein (RDP), VFA concentrations are high and ruminal pH is low. 17 Feed intake and salivary secretion affect pH in the rumen. 18 At a higher level of feed or dry matter (DM) intake, the pH of the rumen is lower.…”

Section: Factors Affecting Microbial Protein Synthesis In the Rumenmentioning

confidence: 99%

Factors Affecting Rumen Microbial Protein Synthesis: A Review

Harun¹

2019

Vet Med Open J

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There is a diversified microbial ecosystem in the rumen for efficient utilization of diet by providing essential nutrient to their host. But there are different factors affecting rumen microbial protein synthesis which are physical factors, chemical factors, dietary factors, biological factors and endogenous factors. Among the details of factors, dietary factors and ruminal pH are the dominant factors influencing rumen microbial protein production. The effects of some dietary factors, on the amount and efficiency of microbial protein synthesis, are discussed in this review. Specifically, these factors include forage quality diets, level of feed and types of feed. It seemed that diets containing a mixture of forages and concentrates increase the efficiency of microbial protein synthesis because of an improved rumen environment for the growth of more diverse bacterial species. This review describes physical and chemical factors which include: pH and buffer system, oxygen concentration, rumen outflow rate and synchronized release of nitrogen and energy from the diet, a nitrogen compound, energy spilling, vitamins and minerals and antimicrobials chemicals, respectively. Age, species, physiological status, sex, and stress are among endogenous factors that mostly affect microbial protein synthesis of a ruminant. Bacteriophages, protozoa predation and bacterial lysis are biological factors affecting the efficiency of microbial protein synthesis. All these factors have a direct effect on the synthesis of microbial protein in the rumen. Therefore, the cumulative effects of the above factors are resulted in the depopulation of rumen microflora and finally reduction of animal product. So, improvement in quantitative aspect of microbial protein synthesis solves many problems from simple to complex so that, the quantitative aspect of rumen microbial biomass are invaluable for health and productivity of ruminants than qualitative aspect hence, maintain health rumen ecosystem means having healthy ruminant.

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“…Total ruminal pH value before feeding for whey was observed to be lowest among treatment which could be attributed to the DM intake of the animal. At a higher level of DM intake, the pH of the rumen is lower (Robinson et al, 1986;Madsen and Hvelplund, 1988;Zhao et al, 1993). Hutjens (1997) noted that rumen pH can drop as more substrates, such as starch, are available for microbial use increasing acid production.…”

Section: Ruminal Phmentioning

confidence: 99%

Performance of Growing Lambs as Influenced by Liquid Acid Whey Supplementation

Poliquit

Sanchez

2013

ATR

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Twelve male growing lambs were used in a randomized complete block design to determine the effects of feeding liquid acid whey (LAW) on the performance of the animal, its dry matter intake, nutrient digestibility, weight gain and ruminal pH. Animals received a diet consisting of Napier grass (Pennisetum purpureum, Schumacher). Treatments were Napier grass plus concentrate, Napier grass plus LAW and Napier grass plus concentrate plus LAW. Individual dry matter intake (DMI), biweekly weight gain (WG) and ruminal pH were measured. Diet digestibility was determined using the total collection method. Results showed that LAW increased (p<0.05) WG and diet digestibility (dry matter, organic matter and crude protein). Liquid acid whey had an average digestibility of 54.41% for dry matter, 83.94% for organic matter and 87.56% for crude protein. Ruminal pH two hours after feeding was stable for animals with LAW alone. However, DMI was similar (p>0.05) among treatments. It can be concluded that including LAW in the diet significantly improved WG, diet digestibility and ruminal pH without affecting DMI.

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The effects of feeding level and roughage/concentrate ratio on the measurement of protein degradability of two tropical forages in the rumen of goats, using the nylon bag technique

Cited by 17 publications

References 11 publications

Utilization of nutrients as influenced by different restriction levels of feed intake under sub-tropical conditions in crossbred calves

Utilization of nutrients as influenced by different restriction levels of feed intake under sub-tropical conditions in crossbred calves

Factors Affecting Rumen Microbial Protein Synthesis: A Review

Performance of Growing Lambs as Influenced by Liquid Acid Whey Supplementation

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