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

Table 4

Final tiller density (tillers m⁻²) of three bromegrass species after 60 days of growth in the field for undefoliated control or following defoliation to 5 cm at two stages of growth 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	2000 a^†	6500 a	2107 a	6067 a	1320 a	3833 a
Smooth bromegrass	1200 c	5367 a	1093 c	5500 a	520 c	3500 a
Hybrid bromegrass	1520 b	5800 a	1547 b	5533 a	840 b	3467 a
𝑃	< .01	.12	< .01	.40	< .01	.54
SEM^‡	222	312	74	287	57	950

^†Means within a column with the same letter (a-b) are not significantly different (𝑃>.05).
^‡Standard error of the mean.
^§Final tiller number in the greenhouse was adjusted by analysis of covariance.