The Scientific World Journal

Research Article

Switchgrass Cultivar/Ecotype Selection and Management for Biofuels in the Upper Southeast USA

Table 6

Effect of management (one-cut (low input and management) and two-cut (high input and management)) and cultivar on yield of switchgrass grown at eight locations in upper southeast USA. Data are averaged across 2 years (CIR: Cave-in-Rock).


Cuttings/N	Cultivar	Location¹								Mean
Cuttings/N	Cultivar	KY	NC	TN₁	TN₂	VA₁	VA₂	VA₃	WV	Mean

		Yield (Mg/ha)
One/50 kg	Alamo	14.5	11.0	9.7	22.8	10.1	22.2	18.7	16.9	15.7	4.1
	Kanlow	15.6	10.9	11.9	19.0	12.4	20.6	18.3	19.4	16.0	3.7
	CIR	11.7	8.3	8.3	14.1	11.9	15.1	13.8	14.7	12.2	2.9
	Shelter	9.5	6.6	8.3	11.5	10.0	11.8	11.7	14.7	10.5	2.3
	Mean	12.8	9.2	9.6	16.9	11.1	17.4	15.6	16.4	13.6	2.4
		2.1	3.7	2.1	3.3	2.8	5.3	3.8	2.5	1.6	—
Two/100 kg	Alamo	16.1	13.2	13.4	17.4	14.7	21.1	17.7	14.1	16.0	3.7
	CIR	13.5	13.4	15.6	16.8	15.9	18.6	17.5	16.0	15.9	2.8
	Kanlow	15.2	12.4	13.6	14.5	16.3	20.6	16.8	14.6	15.5	3.1
	Shelter	11.0	11.3	11.4	14.7	15.0	17.7	14.6	14.5	13.8	2.5
	Mean	14.0	12.6	13.5	15.9	15.5	19.5	16.7	14.8	15.3	0.9
		1.4	NS⁵	4.1	NS	2.6	NS	2.1	1.0	1.3	—

		0.5	1.3	NS	NS	3.5	NS	NS	1.5	1.3	—

Locations: KY (Princeton), NC (Raleigh), TN₁ (Jackson), TN₂ (Knoxville), VA_1,2(Blacksburg), VA₃ (Orange), and WV (Morgantown).
LSD for comparison of cultivars within a management and location.
LSD for comparison of means within location.
LSD for comparison of locations within each management and cultivar.
NS: not significant.