Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 11/25/1999
Publication Date: N/A
Citation: Muir, J.P., Ocumpaugh, W.R., Jones, R.M., Sanderson, M.A., Reed, R.L. 1999. Effect of row spacing, nitrogen, and phosphorus on 'Alamo' switchgrass[abstract]. Agronomy Abstracts. p. 105. Interpretive Summary:
Technical Abstract: Single harvest herbage, P, and N yields were measured on 'Alamo' switchgrass at Stephenville (5 yr), and Beeville (4 yr), Texas. Nitrogen (0, 56, 112, 168, and 224 kg N/ha) and P (0, 22, 45, 67, and 90 kg P/ha) were applied on three row spacings: 178, 356, and 534 mm. Narrower row spacing increased yield only during the establishment year at Beeville. Fertilizer P had no effect at either location during any year. Nitrogen increased yield every year at both locations. Nitrogen increased herbage N concentrations at Beeville in yr 4 and every year at Stephenville; herbage N yield increased with N fertilization at both locations. Nitrogen levels increased herbage P concentrations most at Stephenville in yr 3. Fertilizer N also increased herbage P yield at both locations.