The Scientific World Journal

Research Article

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

Table 8

Effect of ecotype and management (one-cut (low input and management) and two-cut (high input and management)) on yield of switchgrass at eight locations across upper southeast USA. Data are averaged across cultivars (Alamo + Kanlow = lowland; Cave-in-Rock + Shelter = upland) and 2 years.


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

		Yield (Mg/ha)
Lowland	One/50	15.1	11.0	10.8	20.9	11.2	21.4	18.5	18.1	15.9	2.7
	Two/100	15.7	12.8	13.5	16.0	15.5	20.8	17.2	14.3	15.7	2.3
	Mean	15.4	11.9	12.2	18.5	13.4	21.1	17.9	16.2	15.8	1.9
		NS⁵	NS	2.6	2.7	1.9	NS	NS	1.6	NS	—
Upland	One/50	10.6	7.5	8.3	12.8	11.0	13.5	12.7	14.7	11.4	1.9
	Two/100	12.2	12.4	13.5	15.8	15.4	18.2	16.1	15.3	14.9	2.0
	Mean	11.4	10.0	10.9	14.3	13.2	15.9	14.4	15.0	13.1	1.6
		1.6	1.2	1.7	1.3	1.3	2.3	1.7	NS	0.7	—

		1.0	NS	NS	1.7	NS	2.2	2.3	1.2	0.8	—

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