title: The yield and composition of switchgrass and coastal panic grass grown as a biofuel in southern England.
abstract: Switchgrass (Panicum virgatum L.) and coastal panic grass (Panicum amarum A.S. Hitchc. & Chase) are perennial grasses indigenous to North America. Switchgrass has been shown to have good potential as a biofuel crop in both the US and Canada. In the study reported here, seven varieties of switchgrass and one panic grass were evaluated for 5 years under the temperate maritime conditions in Southern England. Both species had 0 or 60 kg N ha(-1) applied annually in spring as treatment. Yield was measured after flowering and when stems were dead in the winter. Yield increased annually for 4-5 years except for the variety Dacotah, and in the fifth year dead stem yields ranged from 8.82 to 13.97 t dm ha(-1). There was no response to N except for one variety in one year. Mineral concentration in biomass was higher at flowering than at dead stem harvest and delaying harvesting further provided more time for P, K and Cl to be leached but yield also declined.
authors.affiliation: IACR, Rothamsted, Harpenden, Hertfordshire, UK. dudley.christian@bbsrc.ac.uk
authors.forename: D G
authors.initials: DG
authors.lastname: Christian
authors.forename: A B
authors.initials: AB
authors.lastname: Riche
authors.forename: N E
authors.initials: NE
authors.lastname: Yates
mesh_terms: D000383:Agriculture; D002713:Chlorine; D004736:Energy-Generating Resources; D004739:England; D010758:Phosphorus; D006109:Poaceae; D011188:Potassium; D012621:Seasons; D012987:Soil; D013696:Temperature; D013997:Time Factors; D014887:Weather
chemical_list: D012987:Soil; D010758:Phosphorus; D002713:Chlorine; D011188:Potassium