Responses of Three Bromegrass (Bromus) Species to Defoliation under Different Growth Conditions

Table 2

Above-ground biomass (g m⁻²) of three bromegrass species after 60 days of growth in undefoliated control or following defoliation to 5 cm in field or greenhouse studies conducted in 2006 and 2007 at Saskatoon, Canada.

Species	Undefoliated control		Defoliated at vegetative stage		Defoliated at stem elongation stage
	Field	Greenhouse	Field	Greenhouse	Field	Greenhouse
Meadow bromegrass	1039 b^†	1239 a	557 a	937 a	324 a	663 a
Smooth bromegrass	1072 b	1127 ab	493 a	775 b	217 b	561 b
Hybrid bromegrass	1224 a	954 b	512 a	822 ab	295 a	551 b
𝑃	.03	.05	.48	.04	.01	.04
SEM^‡	203	79	85	85	74	86

^†Means within a column with the same letter (a-b) are not significantly different (𝑃>.05).
^‡Standard error of the mean.