Nitrogen Fertilization of Paiaguás Grass: Production and Nutrition

Abstract

Nitrogen (N) is a nutrient associated with the development of plant shoots, which makes it a vitally important element for the maintenance and sustainability of pasture. The goal of this study was to evaluate the effects of nitrogen fertilization on the productive and nutritional traits of Urochloa brizantha Paiaguás, as well as the efficiency of digital imaging and the use of a chlorophyll meter in obtaining green color indices. The experiment was conducted in the field on the Escola farm at the State University of Goiás, located in São Luís de Montes Belos, GO. A randomized-block design with five treatments and four replicates was adopted. Treatments consisted of four N rates (0, 75, 150, 300, and 600 kg ha -1 ) in the form of ammonium sulfate. The grass res ponded up to the N rate of 374 kg ha -1 for production-related traits, such as plant height, number of tillers, and shoot dry matter. Maximum dry matter yields were 21,225 and 13,710 kg ha -1 year -1 for the first and second cycles, respectively. Both the chlorophyll meter and digital imaging were efficient in indicating plant N nutritional status. Paiaguás grass responds to N similarly to other Urochloa brizantha cultivars.

Productivity and nutrient extraction by Paiaguás palisadegrass, single and intercropping with pigeon pea, submitted to doses of nitrogen

“…Corroborating the results, Domingues et al (2021) presented the exclusive Paiaguás grass fertilized with five doses of N 0, 75, 150, 300 and 600kg ha -1 adjustment to a quadratic regression model to produce dry mass. With maximum productivity in the first cycle for the 1 st , 2 nd , 3 rd , and 4 th period of 5449, 6334, 5652 and 3832kg DM ha -1 for doses of 123, 216, 299 and 321kg of N ha -1 , respectively.…”

“…Nutrient replacement via fertilization is the conventionally established technique for supplying nutrients, making up one of the main forms of availability of these elements. Moreover, nitrogen fertilization, especially of grasses, is considered essential, as nitrogen (N) is directly related to the productive capacity and nutritional characteristics of the pasture (Domingues et al, 2021).…”