Nitrogen, phosphorus, and potassium effects on seeded buffalograss establishment

Field studies were conducted in Kansas, Nebraska, and Oklahoma in 1996 to evaluate the influence of nitrogen (N), phosphorus (P), and potassium (K) applied alone or in combination on the establishment rate of buffalograss [Buchloe dactyloides (Nutt.) Engelm.] from seed. 'Cody' buffalograss burrs were planted at 98 kg·ha^-1. Nitrogen was applied at 0 or 49 kg·ha^-1 at planting and at 49 kg· ha^-1 weekly or every other week for 5 weeks after seeding (WAS). The total N amounts applied were 0, 49, 147, or 294 kg·ha^-1. Phosphorus and K were applied at rates of 0 or 49 kg·ha^-1 at planting only. Percent buffalograss coverage ratings were taken weekly for up to 11 WAS. Buffalograss coverage was enhanced by N rates up to 147 kg·ha^-1. Application of P improved buffalograss establishment at the Nebraska and Oklahoma sites but had no effect at the Kansas site. Potassium application had no influence on establishment at any site. Chemical names used: methyl 2-[[[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)-amino]carbonyl]amino] sulfonyl]benzoate (metsulfuron methyl);6-chloro-N,N′-diethyl-1,3,5-triazine-2,4-diamine (simazine).