Effects of different carbohydrate sources on activity of rumen microbial enzymes and nitrogen retention in sheep fed diet containing recycled poultry bedding

Azizi-Shotorkhoft, A.; Sharifi, Afrooz; Azarfar, Arash; Kiani, Ali

doi:10.1080/09712119.2016.1258363

Cited by 9 publications

(10 citation statements)

References 30 publications

(32 reference statements)

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“…According to a study by Raghuvansi et al (2007) , the increase in the production of fibrolytic enzymes could be attributed to the higher numbers of fibrolytic bacteria. Our results indicated that group S1 showed higher enzymes activities (cellulase and xylanase), and a higher bacterial population followed by S3 ( Table 4 ); this finding could be attributed to the presence of rapidly degradable carbohydrates and degradable nitrogen in S1 groups that stimulated bacterial growth ( Raghuvansi et al, 2007 ; Azizi-Shotorkhoft et al, 2018 ). Moreover, higher cellulase production and bacterial population in S3 compared to S2 could be explained by the presence of molasses in the diet and higher content of ADF, which agrees with the results of Azizi-Shotorkhoft et al (2018) who indicated that the inclusion of molasses increased the cellulolytic activities.…”

Section: Discussionmentioning

confidence: 61%

“…Our results indicated that group S1 showed higher enzymes activities (cellulase and xylanase), and a higher bacterial population followed by S3 ( Table 4 ); this finding could be attributed to the presence of rapidly degradable carbohydrates and degradable nitrogen in S1 groups that stimulated bacterial growth ( Raghuvansi et al, 2007 ; Azizi-Shotorkhoft et al, 2018 ). Moreover, higher cellulase production and bacterial population in S3 compared to S2 could be explained by the presence of molasses in the diet and higher content of ADF, which agrees with the results of Azizi-Shotorkhoft et al (2018) who indicated that the inclusion of molasses increased the cellulolytic activities. On the other hand, Khattab & Tawab (2018) reported that the inclusion of palm fronds in the animal diet reduced microbial protein due to low protein content that depresses microbial growth.…”

Section: Discussionmentioning

confidence: 61%

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Rumen bacterial community profile and fermentation in Barki sheep fed olive cake and date palm byproducts

Rabee

Kewan

Sabra

et al. 2021

PeerJ

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Rumen bacteria make the greatest contribution to rumen fermentation that enables the host animal to utilize the ingested feeds. Agro-industrial byproducts (AIP) such as olive cake (OC) and date palm byproducts (discarded dates (DD), and date palm fronds (DPF)) represent a practical solution to the deficiency in common feed resources. In this study, thirty-six growing Barki lambs were divided into three groups to evaluate the effect of untraditional diets including the AIP on the growth performance. Subsequently, nine adult Barki rams were used to evaluate the effect of experimental diets on rumen fermentation and rumen bacteria. Three rations were used: common concentrate mixture (S1), common untraditional concentrate mixture including OC and DD (S2), and the same concentrate mixture in S2 supplemented with roughage as DPF enriched with 15% molasses (S3). The animals in S2 group showed higher dry matter intake (DMI) and lower relative growth rate (RGR) as compared to the animals in S1 group. However, the animals in S3 group were the lowest in DMI but achieved RGR by about 87.6% of that in the S1 group. Rumen pH, acetic and butyric acids were more prevalent in animals of S3 group and rumen ammonia (NH3-N), total volatile fatty acids (TVFA), propionic acid were higher in S1. Rumen enzymes activities were higher in S1 group followed by S3 and S2. The bacterial population was more prevalent in S1 and microbial diversity was higher in the S3 group. Principal coordinate analysis revealed clusters associated with diet type and the relative abundance of bacteria varied between sheep groups. The bacterial community was dominated by phylum Bacteroidetes and Firmicutes; whereas, Prevotella, Ruminococcus, and Butyrivibrio were the dominant genera. Results indicate that diet S3 supplemented by OC, DD, and DPF could replace the conventional feed mixture.

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Section: Discussionmentioning

confidence: 61%

Section: Discussionmentioning

confidence: 61%

Rumen bacterial community profile and fermentation in Barki sheep fed olive cake and date palm byproducts

Rabee

Kewan

Sabra

et al. 2021

PeerJ

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show abstract

“…The activities of xylanase and cellulase ( Table 1 ) varied slightly by the inclusion of OC, DD, and DPF in the sheep diet. Higher cellulase and xylanase production could be attributed to the abundance of cellulolytic and xylanolytic bacteria [38] , [39] . On the other hand, Kala et al [40] illustrated that cellulase and xylanase in the buffalo rumen were not affected by diet type.…”

Section: Discussionmentioning

confidence: 99%

Effect of olive and date palm by-products on rumen methanogenic community in Barki sheep

Rabee¹,

Kewan²,

Shaer³

et al. 2022

AIMSMICRO

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<abstract> <p>Rumen methanogens prevent the accumulation of fermentation gases in the rumen and generate methane that increases global warming and represents a loss in animals' gross energy. Non-traditional feed resources such as the by-products of date palm (<italic>Phoenix dactylifera</italic>) and olive (<italic>Olea europaea</italic>) trees have received attention to be used in animal feeding. This study evaluated the impact of non-traditional feed resources including olive cake (OC), discarded dates (DD), and date palm frond (DPF) in sheep diet on rumen fermentation, diversity and relative abundance of rumen methanogens. Nine adult rams were assigned to three equal groups and fed three diets: traditional concentrates mixture (S1); non-traditional concentrate mixture (S2) based on DD and OC; and (S3) composed of the same S2 concentrate supplemented with DPF as a roughage part. The results showed that rumen pH was higher with S3 diet than the other two diets. However, the S1 diet showed the highest values of total volatile fatty acids (TVFA) and rumen ammonia. In addition, the proportions of acetic and butyric acids were increased, whereas propionic acid declined in S2 and S3 compared to the S1 diet. Rumen methanogens were dominated by <italic>Methanobrevibacter</italic> that showed a numeric decline by including DD, OC, and DPF in the animal diets. Principal component analysis (PCA) based on rumen fermentation parameters and relative abundances of methanogens genera showed three distinct clusters. Also, positive and negative correlations were revealed between methanogens genera and rumen metabolites. This study expands the knowledge regarding the effect of agricultural byproducts on rumen fermentation and the methanogenic community.</p> </abstract>

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“…According to a study by Raghuvansi et al (2007), the increase in the production of fibrolytic enzymes could be attributed to the higher numbers of fibrolytic bacteria. Our results indicated that group S1 showed higher enzymes activities (cellulase and xylanase), and a higher bacterial population followed by S3 (Table 4); this finding could be attributed to the presence of rapidly degradable carbohydrates and degradable nitrogen in S1 groups that stimulated bacterial growth (Raghuvansi et al, 2007;Azizi-Shotorkhoft et al, 2018). Moreover, higher cellulase production and bacterial population in S3 compared to S2 could be explained by the presence of molasses in the diet and higher content of ADF, which agrees with the results of Azizi-Shotorkhoft et al ( 2018) who indicated that the inclusion of molasses increased the cellulolytic activities.…”

Section: Rumen Fermentation Activitymentioning

confidence: 66%

Peer Review #1 of "Rumen bacterial community profile and fermentation in Barki sheep fed olive cake and date palm byproducts (v0.1)"

García‐Contreras¹

2021

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Effects of different carbohydrate sources on activity of rumen microbial enzymes and nitrogen retention in sheep fed diet containing recycled poultry bedding

Abstract: View related articles View Crossmark data Citing articles: 1 View citing articles Effects of different carbohydrate sources on activity of rumen microbial enzymes and nitrogen retention in sheep fed diet containing recycled poultry bedding

Cited by 9 publications

References 30 publications

Rumen bacterial community profile and fermentation in Barki sheep fed olive cake and date palm byproducts

Rumen bacterial community profile and fermentation in Barki sheep fed olive cake and date palm byproducts

Effect of olive and date palm by-products on rumen methanogenic community in Barki sheep

Peer Review #1 of "Rumen bacterial community profile and fermentation in Barki sheep fed olive cake and date palm byproducts (v0.1)"

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