Background:Methane production and fatty acids(FA)biohydrogenation in the rumen are two main constraints in ruminant production causing environmental burden and reducing food product quality.Rumen functions can be modu...Background:Methane production and fatty acids(FA)biohydrogenation in the rumen are two main constraints in ruminant production causing environmental burden and reducing food product quality.Rumen functions can be modulated by the biologically active compounds(BACs)of plant origins as shown in several studies e.g.reduction in methane emission,modulation of FA composition with positive impact on the ruminant products.Coleus amboinicus Lour.(CAL)contains high concentration of polyphenols that may potentially reduce methane production and modulate ruminal biohydrogenation of unsaturated FA.This study aimed to investigate the effect of BAC of Coleus amboinicus Lour.(CAL)fed to growing lambs on ruminal methane production,biohydrogenation of unsaturated FA and meat characteristics.In this study,the in vitro experiment aiming at determining the most effective CAL dose for in vivo experiments was followed by two in vivo experiments in rumen-cannulated rams and growing lambs.Experiment 1(RUSITEC)comprised of control and three experimental diets differing in CAL content(10%,15%,and 20%of the total diet).The two in vivo experiments were conducted on six growing,rumen-cannulated lambs(Exp.2)and 16 growing lambs(Exp.3).Animals were assigned into the control(CON)and experimental(20%of CAL)groups.Several parameters were examined in vitro(pH,ammonia and VFA concentrations,protozoa,methanogens and select bacteria populations)and in vivo(methane production,digestibility,ruminal microorganism populations,meat quality,fatty acids profiles in rumen fluid and meat,transcript expression of 5 genes in meat).Results:CAL lowered in vitro methane production by 51%.In the in vivo Exp.3,CAL decreased methane production by 20%compared with the CON group,which corresponded to reduction of total methanogen counts by up to 28%in all experiments,notably Methanobacteriales.In Exp.3,CAL increased or tended to increase populations of some rumen bacteria(Ruminococcus albus,Megasphaera elsdenii,Butyrivibrio proteoclasticus,and Butyrivibrio fibrisolvens).Dietary CAL suppressed the Holotricha population,but increased or tended to increase Entodiniomorpha population in vivo.An increase in the polyunsaturated fatty acid(PUFA)proportion in the rumen of lambs was noted in response to the CAL diet,which was mainly attributable to the increase in C18:3 cis-9 cis-12cis-15(LNA)proportion.CAL reduced the mRNA expression of four out of five genes investigated in meat(fatty acid synthase,stearoyl-CoA desaturase,lipoprotein lipase,and fatty acid desaturase 1).Conclusions:Summarizing,polyphenols of CAL origin(20%in diet)mitigated ruminal methane production by inhibiting the methanogen communities.CAL supplementation also improved ruminal environment by modulating ruminal bacteria involved in fermentation and biohydrogenation of FA.Besides,CAL elevated the LNA concentration,which improved meat quality through increased deposition of n-3 PUFA.Highlight·Coleus amboinicus Lour.(CAL)into sheep diet decreased CH4emission.·CAL did not reduce nutrient digestibility,but inhibited the methanogen community.·CAL increased ruminal propionate proportion and decreased acetate/propionate ratio.·CAL elevated n-3 fatty acid concentration in ruminal fluid and meat.·Supplementation of CAL improved some meat quality traits.展开更多
Background:The use of industrial by-products rich in bioactive compounds as animal feeds can reduce greenhouse gas production.Paulownia leaves silage(PLS)was supplemented to dairy cows'diet and evaluated in vitro(...Background:The use of industrial by-products rich in bioactive compounds as animal feeds can reduce greenhouse gas production.Paulownia leaves silage(PLS)was supplemented to dairy cows'diet and evaluated in vitro(Exp.1;Rusitec)and in vivo(Exp.2,cannulated lactating dairy cows and Exp.3,non-cannulated lactating dairy cows).The study investigated the PLS effect on ruminal fermentation,microbial populations,methane production and concentration,dry matter intake(DMI),and fatty acid(FA)proportions in ruminal fluid and milk.Results:Several variables of the ruminal fluid were changed in response to the inclusion of PLS.In Exp.1,the p H increased linearly and quadratically,whereas ammonia and total volatile fatty acid(VFA)concentrations increased linearly and cubically.A linear,quadratic,and cubical decrease in methane concentration was observed with increasing dose of the PLS.Exp.2 revealed an increase in ruminal p H and ammonia concentrations,but no changes in total VFA concentration.Inclusion of PLS increased ruminal propionate(at 3 h and 6 h after feeding),isovalerate,and valerate concentrations.Addition of PLS also affected several populations of the analyzed microorganisms.The abundances of protozoa and bacteria were increased,whereas the abundance of archaea were decreased by PLS.Methane production decreased by 11%and 14%in PLS-fed cows compared to the control in Exp.2 and 3,respectively.Exp.3 revealed a reduction in the milk protein and lactose yield in the PLS-fed cows,but no effect on DMI and energy corrected milk yield.Also,the PLS diet affected the ruminal biohydrogenation process with an increased proportions of C18:3 cis-9 cis-12 cis-15,conjugated linoleic acid,C18:1 trans-11 FA,polyunsaturated fatty acids(PUFA),and reduced n6/n3 ratio and saturated fatty acids(SFA)proportion in milk.The relative transcript abundances of the 5 of 6 analyzed genes regulating FA metabolism increased.Conclusions:The dietary PLS replacing the alfalfa silage at 60 g/kg diet can reduce the methane emission and improve milk quality with greater proportions of PUFA,including conjugated linoleic acid,and C18:1 trans-11 along with reduction of SFA.展开更多
Background:The present study aimed at investigating the influence of 90%menthol-containing plant bioactive lipid compounds(PBLC,essential oils)on growth performance,blood haematological and biochemical profile,and nut...Background:The present study aimed at investigating the influence of 90%menthol-containing plant bioactive lipid compounds(PBLC,essential oils)on growth performance,blood haematological and biochemical profile,and nutrient absorption in sheep.Twenty-four growing Suffolk sheep were allotted into three dietary treatments:Control(without PBLC),lower dose of PBLC(PBLC-L;80 mg/d)and higher dose of PBLC(PBLC-H;160 mg/d).Sheep in all groups were fed meadow hay ad libitum plus 600 g/d of concentrate pellets for 28 d.Results:Average daily gain was not affected by treatment.Feeding of PBLC increased hay and total feed intake per kg body weight(P<0.05).Counts of total leucocytes,lymphocytes and monocytes were not different among treatments.However,neutrophil count decreased(P<0.05)in PBLC-H with a similar trend in PBLC-L(P<0.10).Concentrations of glucose,bilirubin,triglycerides,cholesterol,urea and magnesium in serum were not different among sheep fed different doses of PBLC.However,serum calcium concentration tended to increase in PBLC-H(P<0.10)and serum concentrations of aspartate&asparagine(P<0.01)and glutamate&glutamine(P<0.05)increased linearly with increasing PBLC dose.In ruminal epithelia isolated from the rumen after killing,baseline conductance(Gt;P<0.05)and short-circuit current(Isc;P<0.01)increased in both PBLC groups.Ruminal uptakes of glucose and methionine in the presence of Na+were not affected by the dietary PBLC supplementation.In the absence of Na+,however,glucose and methionine uptakes increased(P<0.05)in PBLC-H.In the jejunum,Isc tended to increase in PBLC-H(P<0.10),but baseline Gtwas not affected.Intestinal uptakes of glucose and methionine were not influenced by PBLC in the presence or absence of Na+.Conclusion:The results suggest that menthol-rich PBLC increase feed intake,and passive ion and nutrient transport,the latter specifically in the rumen.They also increased serum concentrations of urea precursor amino acids and tended to increase serum calcium concentrations.Future studies will have to show whether some of these findings might be commonly linked to a stimulation of transient receptor potential(TRP)channels in the gastrointestinal tract.展开更多
基金funded by the National Science Centre funding program Grant 2018/31/N/NZ9/01589。
文摘Background:Methane production and fatty acids(FA)biohydrogenation in the rumen are two main constraints in ruminant production causing environmental burden and reducing food product quality.Rumen functions can be modulated by the biologically active compounds(BACs)of plant origins as shown in several studies e.g.reduction in methane emission,modulation of FA composition with positive impact on the ruminant products.Coleus amboinicus Lour.(CAL)contains high concentration of polyphenols that may potentially reduce methane production and modulate ruminal biohydrogenation of unsaturated FA.This study aimed to investigate the effect of BAC of Coleus amboinicus Lour.(CAL)fed to growing lambs on ruminal methane production,biohydrogenation of unsaturated FA and meat characteristics.In this study,the in vitro experiment aiming at determining the most effective CAL dose for in vivo experiments was followed by two in vivo experiments in rumen-cannulated rams and growing lambs.Experiment 1(RUSITEC)comprised of control and three experimental diets differing in CAL content(10%,15%,and 20%of the total diet).The two in vivo experiments were conducted on six growing,rumen-cannulated lambs(Exp.2)and 16 growing lambs(Exp.3).Animals were assigned into the control(CON)and experimental(20%of CAL)groups.Several parameters were examined in vitro(pH,ammonia and VFA concentrations,protozoa,methanogens and select bacteria populations)and in vivo(methane production,digestibility,ruminal microorganism populations,meat quality,fatty acids profiles in rumen fluid and meat,transcript expression of 5 genes in meat).Results:CAL lowered in vitro methane production by 51%.In the in vivo Exp.3,CAL decreased methane production by 20%compared with the CON group,which corresponded to reduction of total methanogen counts by up to 28%in all experiments,notably Methanobacteriales.In Exp.3,CAL increased or tended to increase populations of some rumen bacteria(Ruminococcus albus,Megasphaera elsdenii,Butyrivibrio proteoclasticus,and Butyrivibrio fibrisolvens).Dietary CAL suppressed the Holotricha population,but increased or tended to increase Entodiniomorpha population in vivo.An increase in the polyunsaturated fatty acid(PUFA)proportion in the rumen of lambs was noted in response to the CAL diet,which was mainly attributable to the increase in C18:3 cis-9 cis-12cis-15(LNA)proportion.CAL reduced the mRNA expression of four out of five genes investigated in meat(fatty acid synthase,stearoyl-CoA desaturase,lipoprotein lipase,and fatty acid desaturase 1).Conclusions:Summarizing,polyphenols of CAL origin(20%in diet)mitigated ruminal methane production by inhibiting the methanogen communities.CAL supplementation also improved ruminal environment by modulating ruminal bacteria involved in fermentation and biohydrogenation of FA.Besides,CAL elevated the LNA concentration,which improved meat quality through increased deposition of n-3 PUFA.Highlight·Coleus amboinicus Lour.(CAL)into sheep diet decreased CH4emission.·CAL did not reduce nutrient digestibility,but inhibited the methanogen community.·CAL increased ruminal propionate proportion and decreased acetate/propionate ratio.·CAL elevated n-3 fatty acid concentration in ruminal fluid and meat.·Supplementation of CAL improved some meat quality traits.
基金a grant from the National Science Center,Poland(Grant No.2016/23/B/NZ9/03427)co-financed within the framework of the Polish Ministry of Science and Higher Education’s program:“Regional Initiative Excellence”in the years 2019–2022(No.005/RID/2018/19)“financing amount 12000000,00 PLN”。
文摘Background:The use of industrial by-products rich in bioactive compounds as animal feeds can reduce greenhouse gas production.Paulownia leaves silage(PLS)was supplemented to dairy cows'diet and evaluated in vitro(Exp.1;Rusitec)and in vivo(Exp.2,cannulated lactating dairy cows and Exp.3,non-cannulated lactating dairy cows).The study investigated the PLS effect on ruminal fermentation,microbial populations,methane production and concentration,dry matter intake(DMI),and fatty acid(FA)proportions in ruminal fluid and milk.Results:Several variables of the ruminal fluid were changed in response to the inclusion of PLS.In Exp.1,the p H increased linearly and quadratically,whereas ammonia and total volatile fatty acid(VFA)concentrations increased linearly and cubically.A linear,quadratic,and cubical decrease in methane concentration was observed with increasing dose of the PLS.Exp.2 revealed an increase in ruminal p H and ammonia concentrations,but no changes in total VFA concentration.Inclusion of PLS increased ruminal propionate(at 3 h and 6 h after feeding),isovalerate,and valerate concentrations.Addition of PLS also affected several populations of the analyzed microorganisms.The abundances of protozoa and bacteria were increased,whereas the abundance of archaea were decreased by PLS.Methane production decreased by 11%and 14%in PLS-fed cows compared to the control in Exp.2 and 3,respectively.Exp.3 revealed a reduction in the milk protein and lactose yield in the PLS-fed cows,but no effect on DMI and energy corrected milk yield.Also,the PLS diet affected the ruminal biohydrogenation process with an increased proportions of C18:3 cis-9 cis-12 cis-15,conjugated linoleic acid,C18:1 trans-11 FA,polyunsaturated fatty acids(PUFA),and reduced n6/n3 ratio and saturated fatty acids(SFA)proportion in milk.The relative transcript abundances of the 5 of 6 analyzed genes regulating FA metabolism increased.Conclusions:The dietary PLS replacing the alfalfa silage at 60 g/kg diet can reduce the methane emission and improve milk quality with greater proportions of PUFA,including conjugated linoleic acid,and C18:1 trans-11 along with reduction of SFA.
基金supported by a fellowship from the Alexander von Humboldt Foundation to AKP and accessory bench feesfinancial support from Performa Nat Gmb H.Amino acid analysis was supported by the framework of the Ministry of Science and Higher Education programme as“Regional Initiative Excellence”in years 2019–2022,Project No.005/RID/2018/19(by AC and MSS).
文摘Background:The present study aimed at investigating the influence of 90%menthol-containing plant bioactive lipid compounds(PBLC,essential oils)on growth performance,blood haematological and biochemical profile,and nutrient absorption in sheep.Twenty-four growing Suffolk sheep were allotted into three dietary treatments:Control(without PBLC),lower dose of PBLC(PBLC-L;80 mg/d)and higher dose of PBLC(PBLC-H;160 mg/d).Sheep in all groups were fed meadow hay ad libitum plus 600 g/d of concentrate pellets for 28 d.Results:Average daily gain was not affected by treatment.Feeding of PBLC increased hay and total feed intake per kg body weight(P<0.05).Counts of total leucocytes,lymphocytes and monocytes were not different among treatments.However,neutrophil count decreased(P<0.05)in PBLC-H with a similar trend in PBLC-L(P<0.10).Concentrations of glucose,bilirubin,triglycerides,cholesterol,urea and magnesium in serum were not different among sheep fed different doses of PBLC.However,serum calcium concentration tended to increase in PBLC-H(P<0.10)and serum concentrations of aspartate&asparagine(P<0.01)and glutamate&glutamine(P<0.05)increased linearly with increasing PBLC dose.In ruminal epithelia isolated from the rumen after killing,baseline conductance(Gt;P<0.05)and short-circuit current(Isc;P<0.01)increased in both PBLC groups.Ruminal uptakes of glucose and methionine in the presence of Na+were not affected by the dietary PBLC supplementation.In the absence of Na+,however,glucose and methionine uptakes increased(P<0.05)in PBLC-H.In the jejunum,Isc tended to increase in PBLC-H(P<0.10),but baseline Gtwas not affected.Intestinal uptakes of glucose and methionine were not influenced by PBLC in the presence or absence of Na+.Conclusion:The results suggest that menthol-rich PBLC increase feed intake,and passive ion and nutrient transport,the latter specifically in the rumen.They also increased serum concentrations of urea precursor amino acids and tended to increase serum calcium concentrations.Future studies will have to show whether some of these findings might be commonly linked to a stimulation of transient receptor potential(TRP)channels in the gastrointestinal tract.
