. 2021 Oct 9;7(4):1371–1387. doi: 10.1016/j.aninu.2021.10.003

Table 7.

In vitro studies of methane (CH₄) emissions from red seaweed or bromochloromethane (BCM) supplementation.

System	Basal diet	Treatment	CH₄ production	Reference¹
Ankom	Rhodes grass (Chloris gayana)	A. taxiformis, % DM	CH₄, mL/g OM	1
		Control (no seaweed)	22.2^a
		0.5	19.6^b
		1.0	3.4^c
		5.0	<0.05^c
		10.0	<0.05^c
	Rate of change, %		−99.8
	Rhodes grass	Oedogonium sp., % DM	CH₄, mL/g OM	2
		Control (no seaweed)	22.2^a
		10.0	20.9^a
		50.0	18.4^b
		100	6.1^c
	Rate of change, %		−72.5
Batch	Grass-hay	BCM, μmol/L	CH₄, mL/100 mL	2
		Control (no BCM)	15.8^a
		5.0	3.5^b
		10.0	1.1^b
	Rate of change, %		−93.0
Batch	Meadow hay/corn silage	Seaweeds, 25% DM	CH₄, mL/g DM	3
		Control (no seaweed)	1.75^a
		Ulva sp. (green)	1.30^b
		L. ochroleua (brown)	1.98^a
		S. latissima (brown)	1.81^a
		Gigartina sp. (red)	1.17^b
		G. vermiculopphylla (red)	1.07^b
	Rate of change, %		−38.9
CC	Dairy TMR	A. taxiformis, 5% OM	CH₄, mL/g OM	4
		Control (no seaweed)	12.08^a
		5.0	0.59^b
	Rate of change, %		−95.1

A. taxiformis = Asparagopsis taxiformis; DM = dry matter; OM = organic matter; L. ochroleua = Laminaria ochroleua, S. latissima = Saccharina latissimi;G. vermiculopphylla = Gracilaria vermiculopphylla; CC = continuous system; TMR = total mixed ration.

^{a, b, c} Values in a column with different superscript letters were significantly different (P < 0.05).

Sources:1 = Machado et al. (2015b), 2 = Goel et al. (2009), 3 = Maia et al. (2016), 4 = Roque et al. (2019b).