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

Table 3

Below-ground biomass (g m⁻³) of three bromegrass species after 60 days growth in an undefoliated control or following defoliation to 5 cm in field and 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	7980 a^†	18480 a	4560 a	14149 a	5650 a	10554 a
Smooth bromegrass	5610 b	16799 a	2740 b	10949 a	2870 c	8356 a
Hybrid bromegrass	6430 ab	17882 a	3660 ab	12280 a	4050 b	7840 a
𝑃	.03	.93	.01	.51	< .01	.52
SEM^‡	600	3748	720	2500	510	1589

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