The Scientific World Journal

Research Article

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

Table 7

Effect of harvest date (first and second harvests) and cultivar on biomass yield of switchgrass grown at eight locations across upper southeast USA under two-cuts (high input and management). Data are averaged across 2 years (CIR: Cave-in-Rock).


Harvest	Cultivar	Location¹								Mean
Harvest	Cultivar	KY	NC	TN₁	TN₂	VA₁	VA₂	VA₃	WV	Mean

		(Mg/ha)
June (first)	Alamo	7.1	8.9	7.7	10.4	6.8	9.3	7.8	7.7	8.2	2.1
	Kanlow	8.3	8.7	9.0	9.8	8.5	10.3	9.1	9.4	9.1	2.0
	CIR	8.2	8.9	10.7	11.7	9.3	10.7	9.7	10.7	10.0	2.1
	Shelter	6.3	7.6	8.0	10.4	8.9	10.0	8.6	10.0	8.7	1.9
	Mean	7.5	8.5	8.8	10.6	8.3	10.1	8.8	9.4	9.0	1.7
		1.2	0.8	2.7	1.0	0.8	1.2	1.0	0.6	0.5	—
November (second)	Alamo	9.0	4.3	5.7	7.0	7.9	11.8	9.9	6.4	7.8	2.4
	Kanlow	6.9	3.7	4.6	4.7	7.8	10.3	7.7	5.2	6.4	2.4
	CIR	5.3	4.6	4.9	5.2	6.6	7.9	7.9	5.3	6.0	1.8
	Shelter	4.7	3.7	3.3	4.3	6.1	7.7	6.1	4.5	5.1	1.4
	Mean	6.5	4.1	4.6	5.3	7.1	9.4	7.9	5.4	6.3	1.8
		1.1	0.9	1.4	0.5	1.4	1.4	1.6	0.7	0.5	—

		0.4	1.4	1.2	1.0	NS⁵	NS	NS	1.3	0.4	—

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 harvest and location.
LSD for comparison of locations within a harvest and cultivar.
LSD for comparison of means within a location.
NS: not significant.