Low drying temperature has negligible impact but defatting increases in vitro rumen digestibility of insect meals, with minor changes on fatty acid biohydrogenation

Renna, Manuela; Coppa, Mauro; Lussiana, Carola; Le Morvan, Aline; Gasco, Laura; Rastello, Lara; Claeys, Jonas; Maxin, Gaëlle

doi:10.1186/s40104-025-01199-5

Journal of Animal Science and Biotechnology

Table 3 Effect of drying temperature of full-fat insect meals on in vitro rumen fermentation parameters

From: Low drying temperature has negligible impact but defatting increases in vitro rumen digestibility of insect meals, with minor changes on fatty acid biohydrogenation

Item^a	Species	Intercept	Intercept SEM	Species coefficient	Species SEM	Temp coefficient	Temp SEM	Temp × Species coefficient	Temp × Species SEM	P-value
Item^a	Species	Intercept	Intercept SEM	Species coefficient	Species SEM	Temp coefficient	Temp SEM	Temp × Species coefficient	Temp × Species SEM	Intercept	Species	Temp	Temp × Species
Total gas 24 h, mmol/g DM		1.72	0.153	-	-	-	-	-	-	<0.001	0.377	0.205	0.065
CH₄ 24 h, µmol/g DM		315	47.5	-	-	-	-	-	-	<0.001	0.643	0.149	0.584
CH₄, mmol/mmol total gas		0.182	0.010	-	-	-	-	-	-	<0.001	0.670	0.123	0.614
pH final		6.97	0.04	-	-	-	-	-	-	<0.001	0.484	0.583	0.669
Total VFA, mmol/g DM		4.77	0.126	-	-	−0.009	0.002	-	-	<0.001	0.855	0.001	0.079
Acetate, g/100g VFA	HI	55.1	0.784	2.86	0.784	0.051	0.014	-	-	<0.001	0.001	0.001	0.075
Acetate, g/100g VFA	TM	55.1	0.784	−2.86	0.784	0.051	0.014	-	-	<0.001	0.001	0.001	0.075
Propionate, g/100g VFA	HI	16.8	0.459	−3.30	0.459	-	-	0.052	0.008	<0.001	<0.001	0.602	<0.001
Propionate, g/100g VFA	TM	16.8	0.459	3.30	0.459	-	-	−0.052	0.008	<0.001	<0.001	0.602	<0.001
Butyrate, g/100g VFA	HI	12.0	0.382	2.67	0.382	−0.028	0.069	-	-	<0.001	<0.001	<0.001	0.280
Butyrate, g/100g VFA	TM	12.0	0.382	−2.67	0.382	−0.028	0.069	-	-	<0.001	<0.001	<0.001	0.280
Acetate:Propionate ratio	HI	3.37	0.118	0.79	0.118	-	-	−0.112	0.002	<0.001	<0.001	0.721	<0.001
Acetate:Propionate ratio	TM	3.37	0.118	−0.79	0.118	-	-	0.112	0.002	<0.001	<0.001	0.721	<0.001
IVOMD, g/100g	HI	32.9	1.381	−7.44	1.381	-	-	0.054	0.025	<0.001	<0.001	0.895	0.042
IVOMD, g/100g	TM	32.9	1.381	7.44	1.381	-	-	−0.054	0.025	<0.001	<0.001	0.895	0.042
NH₃-N, mmol/g DM	HI	3.57	0.104	−0.50	0.104	−0.009	0.002	-	-	<0.001	<0.001	<0.001	0.904
NH₃-N, mmol/g DM	TM	3.57	0.104	0.50	0.104	−0.009	0.002	-	-	<0.001	<0.001	<0.001	0.904
NH₃-N, g/100 g total N		57.7	1.660	-	-	−0.126	0.030	-	-	<0.001	0.214	<0.001	0.914

HI Hermetia illucens, TM Tenebrio molitor, SEM Standard error of the mean, Temp Drying temperature expressed as °C, DM Dry matter, VFA Volatile fatty acids, IVOMD In vitro organic matter disappearance
^aThe missing coefficients in the table (-) correspond to non significant effects, and thus are considered equal to zero

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ISSN: 2049-1891

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