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

Abstract

The objective of this work was to evaluate the productivity and extraction of macronutrients by Urochloa brizantha cv. BRS Paiaguás (Syn. Brachiaria brizantha cv. BRS Paiaguás) single and intercropped with pigeon pea (Cajanus cajan cv. BRS Mandarim), subjected to four doses of nitrogen applied in topdressing (0, 80, 160 and 240 kg ha-1). The experiment was carried out in São Luís de Montes Belos, GO, in soil classified as dystrophic red latosol, under Cerrado conditions. Plant height and dry mass of pigeon pea, plant height, number of tillers, dry mass, and macronutrient extraction by Paiaguás palisadegrass were evaluated. Higher mass production was observed in the pasture intercropped with the legume, requiring a lower amount of N. Based on the results exposed, the cultivation of Paiaguás palisadegrass reaches higher productivity when intercropped with a legume such as pigeon pea, in addition to providing greater efficiency in the use of nutrients such as N, P and K. Nitrogen fertilization has a negative influence on the production of dry mass and height of pigeon pea plants.

Sustainable Production of Maize with Grass and Pigeon Pea Intercropping

“…In the Brazilian cerrado (the same region as the present study), Rezende et al [39] observed that Paiaguás palisade grass, when intercropped with pigeon pea (as in the PPPG treatment), exhibited a higher concentration of minerals in its leaves compared to monoculture. Since legumes improve the chemical composition of soil by increasing its organic matter and nitrogen levels, they provide positive agronomic benefits for plants grown in intercropping systems with legumes [12][13][14].…”

Comportamiento agronómico del pasto insurgente bajo diferentes dosis de residuos sanguíneos líquidos y composición química del suelo

“…Las dosis crecientes de residuos líquidos (0 m³ ha -1 , 150 m³ ha -1 , 300 m³ ha -1 , 450 m³ ha -1 , 600 m³ ha -1 ) condujeron a un aumento significativo de las fracciones de N, P, Ca, Mg, S y Fe en las láminas foliares de pasto insurgente. De acuerdo con Tomazello et al (22) y Rezende et al (23) , el aporte adecuado de nutrientes mejora la acumulación de N, P, Ca, S y Mg en la parte aérea de las gramíneas tropicales manejadas en regiones de sabana. Además, mejora el valor nutricional del forraje producido.…”

Organic and mineral fertilization determining the agronomic performance of sunflower cultivars and soil chemical attributes

“…To achieve high yields, the application of 80 kg ha -1 P 2 O 5 and 60 kg ha -1 K 2 O as fertilizers is recommended (Sousa & Lobato, 2004). However, purchasing chemical fertilizers can increase production costs (Rezende et al, 2022;Leal et al, 2023).…”