. 2022 Oct 21;13:969524. doi: 10.3389/fmicb.2022.969524

Table 2.

Gas fermentation parameters (A, C, AGPR) and IVDMF of in vitro fermentation using inoculum prepared by feces from pigs fed CD or AD diet.

Substrates	Inoculum	A (mL/g)	C (h)	AGPR (mL/g h⁻¹)	IVDMF, %
SCD	FAD	272.7^a	13.3^b	23.8^a	76.7^a
SCD	FCD	250.8^b	15.9^a	16.1^b	73.8^b
SAD	FAD	188.4^a	13.5^b	12.8^a	57.1^a
SAD	FCD	169.3^b	16.1^a	8.7^b	52.3^b
SAI	FAD	125.2	15.5^b	7.9^a	42.1^a
SAI	FCD	108.5	18.6^a	3.3^b	36.8^b
SEM		3.24	0.24	0.44	0.81
P-value
Inoculum		<0.01	<0.01	<0.01	<0.01
Substrate		<0.01	<0.01	<0.01	<0.01
I*S		0.73	0.53	<0.01	0.31

For each substrate, different superscripts (a, b) indicate a significant difference (p < 0.05). A, the maximum gas volume; C, the time to half asymptote; AGPR, the gas production rate when the gas production volume reaches 1/2 of the maximum gas production volume; IVDMF, in vitro dry matter fermentability. FCD, feces of CD group; FAD, feces of AD group; SCD, substrate of control diet; SAD, substrate of alfalfa diet; SAI, substrate of alfalfa ingredient.