The effect of ensiled paulownia leaves in a high-forage diet on ruminal fermentation, methane production, fatty acid composition, and milk ... View Full Text


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Article Info

DATE

2022-08-12

AUTHORS

Haihao Huang, Dorota Lechniak, Malgorzata Szumacher-Strabel, Amlan Kumar Patra, Martyna Kozłowska, Pawel Kolodziejski, Min Gao, Sylwester Ślusarczyk, Daniel Petrič, Adam Cieslak

ABSTRACT

BackgroundThe 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.ResultsSeveral variables of the ruminal fluid were changed in response to the inclusion of PLS. In Exp. 1, the pH 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 pH 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.ConclusionsThe 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.Graphical AbstractGraphical abstract of the experimental roadmap More... »

PAGES

104

Identifiers

URI

http://scigraph.springernature.com/pub.10.1186/s40104-022-00745-9

DOI

http://dx.doi.org/10.1186/s40104-022-00745-9

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1150166399

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/35953848


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23 FA
24 FA metabolism
25 Graphical AbstractGraphical
26 PL
27 PLS
28 PUFA
29 Paulownia
30 SFA
31 VFA concentration
32 abundance
33 abundance of archaea
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35 acid
36 acid composition
37 acid concentration
38 acid proportions
39 addition
40 alfalfa silage
41 ammonia
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43 animal feed
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45 bacteria
46 bioactive compounds
47 biohydrogenation process
48 changes
49 cis-15
50 composition
51 compounds
52 concentration
53 conjugated linoleic acid
54 control
55 cow diets
56 cows
57 dairy cows
58 decrease
59 diet
60 dietary PL
61 dose
62 dry matter intake
63 effect
64 emission
65 energy
66 experimental roadmap
67 fatty acid composition
68 fatty acid concentrations
69 fatty acid proportions
70 fatty acids
71 feed
72 fermentation
73 fluid
74 gas production
75 genes
76 greater proportion
77 greenhouse gas production
78 high-forage diets
79 inclusion
80 increase
81 intake
82 lactose yield
83 linoleic acid
84 matter intake
85 metabolism
86 methane concentration
87 methane emissions
88 methane production
89 microbial populations
90 microorganisms
91 milk
92 milk production performance
93 milk proteins
94 milk quality
95 milk yield
96 n3 ratio
97 n6/n3 ratio
98 pH
99 performance
100 population
101 process
102 production
103 production performance
104 products
105 propionate
106 proportion
107 protein
108 protozoa
109 quality
110 ratio
111 reduction
112 reduction of SFA
113 relative transcript abundance
114 response
115 roadmap
116 ruminal biohydrogenation processes
117 ruminal fermentation
118 ruminal fluid
119 ruminal pH
120 ruminal propionate
121 silage
122 study
123 total VFA concentration
124 total volatile fatty acid concentration
125 trans-11
126 transcript abundance
127 use
128 valerate concentrations
129 variables
130 vivo
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132 yield
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