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 5 Effect of ether extract content of 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	EE coefficient	EE SEM	EE × Species coefficient	EE × Species SEM	P-value
Item^a	Species	Intercept	Intercept SEM	Species coefficient	Species SEM	EE coefficient	EE SEM	EE × Species coefficient	EE × Species SEM	Intercept	Species	EE	EE × Species
Total gas 24 h, mmol/g DM		3.02	0.089	-	-	−0.038	0.005	-	-	<0.001	0.912	<0.001	0.266
CH₄ 24 h, µmol/g DM		743	26.700	-	-	−12.9	1.460	-	-	<0.001	0.597	<0.001	0.133
CH₄, mmol/mmol total gas	HI	0.253	0.0041	-	-	−0.002	0.0002	−0.0006	0.0002	<0.001	0.140	<0.001	0.017
CH₄, mmol/mmol total gas	TM	0.253	0.0041	-	-	−0.002	0.0002	0.0006	0.0002	<0.001	0.140	<0.001	0.017
pH final		6.95	0.02	-	-	-	-	-	-	<0.001	0.524	0.495	0.705
Total VFA, mmol/g DM		5.83	0.105	-	-	−0.063	0.006	-	-	<0.001	0.601	<0.001	0.116
Acetate, g/100g VFA	HI	62.3	0.300	1.66	0.016	−0.18	0.016	−0.045	0.016	<0.001	<0.001	<0.001	0.009
Acetate, g/100g VFA	TM	62.3	0.300	−1.66	0.016	−0.18	0.016	0.045	0.016	<0.001	<0.001	<0.001	0.009
Propionate, g/100g VFA		15.4	0.220	-	-	0.122	0.012	-	-	<0.001	0.983	<0.001	0.517
Butyrate, g/100g VFA	HI	7.58	0.200	-	-	0.088	0.011	0.055	0.011	<0.001	0.367	<0.001	<0.001
Butyrate, g/100g VFA	TM	7.58	0.200	-	-	0.088	0.011	−0.055	0.011	<0.001	0.367	<0.001	<0.001
Acetate:Propionate ratio		4.0	0.057	-	-	−0.033	0.003	-	-	<0.001	0.092	<0.001	0.492
IVOMD, g/100g	HI	45.9	0.966	2.41	0.966	−0.57	0.053	−0.209	0.053	<0.001	0.018	<0.001	<0.001
IVOMD, g/100g	TM	45.9	0.966	−2.41	0.966	−0.57	0.053	0.209	0.053	<0.001	0.018	<0.001	<0.001
NH₃-N, mmol/g DM	HI	3.94	0.072	−0.23	0.072	−0.036	0.004	-	-	<0.001	0.004	<0.001	0.962
NH₃-N, mmol/g DM	TM	3.94	0.072	0.23	0.072	−0.036	0.004	-	-	<0.001	0.004	<0.001	0.962
NH₃-N, g/100 g total N		49.7	1.310	-	-	-	-	-	-	0.001	0.132	0.456	0.190

HI Hermetia illucens, TM Tenebrio molitor, SEM Standard error of the mean, EE Ether extract expressed as g/100 g DM, 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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