|Cooper, Willliam - Bill|
Submitted to: Crop Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 3/20/2005
Publication Date: 6/20/2005
Citation: Springer, T.L., Dewald, C.L., Sims, P.L., Gillen, R.L., Louthan, V.H., Cooper, W., Taliafero, C.M., Wynia, R.L., Houck, M.J., Esquivel, R.G., Stevens, J.A., Brakie, M.R. 2005. Registration of 'Chet' sand bluestem. Crop Science. 45:2125-2126. Interpretive Summary: Not required for Registration process.
Technical Abstract: 'Chet' is a medium stature sand bluestem (Andropogon hallii Hack.) recommended for pasture, hay, complementary rangeland-forage production systems, soil stabilization, or reclamation of marginal croplands in the central and southern Great Plains of the United States. Chet was released in Aug. 2004 and was cooperatively developed by the Agricultural Research Service (ARS), United States Department of Agriculture; the Oklahoma Agricultural Experiment Station; and the Natural Resources Conservation Service (NRCS), United States Department of Agriculture. 'Chet' was derived from a big and sand bluestem collection consisting of 158 accessions received as seed from the USDA-ARS North Central Regional Plant Introduction Station in 1985. Chet went through three polycross selection cycles. Small plot field evaluations of Chet were conducted in the central and southern Great Plains in 2001-2003. The forage dry matter yield of Chet (6,385 kg ha'1) was 8.8 percent greater than that of 'Woodward' sand bluestem (P < 0.03). The seasonal average crude protein (6.4 percent) and in vitro digestible dry matter (51 percent) was not significantly different from Woodward in this field trial (P > 0.05). Seed yields were evaluated in small plots at Woodward and Perkins Oklahoma in 2001-2002. The seed yield of Chet (59 kg ha'1 pure seed) was significantly different and was 59 percent greater than that of Woodward sand bluestem (P < 0.05). In replicated grazing trials during 2000-2003 at the USDA-ARS Southern Plains Experimental Range near Ft. Supply, OK, the average daily gain to stocker cattle (1.19 kg per day over a 62 day grazing period) was not significantly different (P > 0.05) from that of Woodward sand bluestem.