Nitrogen Concentration of Grasses in Relation to Temperature

Abstract

Six cool-season grasses and two warm-season grasses were grown in controlled environment chambers under cool- or warm-temperature regimes, fertilized with increasing rates of N, and analysed for total N and nitrate content. The effect of warm or cool temperatures on percent N was different for warm- and cool-season grasses and varied among individual species. Only two species accumulated nitrate in the cool-temperature regime. Nitrate accumulation under the warm-temperature regime occurred for most of the species, but only after an application of 100 lb N/acre.