Differences in growth-economics of fast vs. slow growing grass species in response to temperature and nitrogen limitation individually, and in combination

Table 2 Physiological response

Parameter	N-treatment	Temp (°C)	Bromus erectus	Bromus hordeaceus	Test statistics
Parameter	N-treatment	Temp (°C)	Bromus erectus	Bromus hordeaceus	t	df	p
Net photosynthesis (nmol/g s)	FA	7	19.49 ± 2.7	38.90 ± 5.3	5.6	3	0.01
		20	268.13 ± 13.1	518.51 ± 42.8	9.6	2	0.01
		30	183.35 ± 71.5	404.52 ± 45.73	8.2	2	0.01
	LA	7	11.12 ± 4.0	17.26 ± 7.8	1.2	3	0.31
		20	186.39 ± 71.5	296.11 ± 19.84	2.5	2	0.12
		30	54.93 ± 11.1	25.54 ± 1.4	4.5	2	0.02
Respiration in the dark (nmol/g s)	FA	7	6.42 ± 1.2	16.68 ± 6.5	2.7	2	0.11
		20	99.66 ± 18.4	183.74 ± 53.3	2.5	2	0.12
		30	102.43 ± 3.3	221.69 ± 14.35	4.5	2	0.04
	LA	7	6.12 ± 1.2	6.81 ± 1.24	0.6	4	0.53
	LA	20	66.03 ± 16.4	90.40 ± 25.4	1.3	3	0.25

Rates of net photosynthesis and leaf respiration in the dark under their respective growth conditions (ex: plants that where grown at 20 °C were measured at 20 °C, plant that were grown at 30 °C were measured at 30 °C)
Values are means of n = 3 samples and shown with standard deviation. Test statistics show results from T-test between the species

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