Agronomic performance of interspecific Paspalum hybrids under nitrogen fertilization or mixed with legumes. Issue 1 (9th January 2021)

• Record Type: Journal Article
• Authors: da Motta, Eder A. Minski; DallAgnol, Miguel; Rios, Esteban F.; de Souza, Cleber H. Lopes; Weiler, Roberto L.; Brunes, André Pich; Simioni, Carine; Rockenbach de Ávila, Mariana; Neto, Douglas; Felix, Leonardo Duarte; Nunes dos Santos, Tamyris
• Is Part Of: Agrosystems, geosciences & environment. Volume 3:Issue 1(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-01-09
• Subjects: Agriculture -- Periodicals; Agriculture -- Environmental aspects -- Periodicals; Soil science -- Periodicals; Food science -- Periodicals; Food science; Agriculture; Agriculture -- Environmental aspects; Electronic journals; Periodicals; 630
• DOI: 10.1002/agg2.20127
• Languages: English
• ISSNs: 2639-6696

Abstract

Abstract: Nitrogen supply and mixtures with legumes affect agronomic performance of pastures, and both practices can guide breeding decisions in Paspalum hybrids. The goals of this study were: (a) quantify herbage accumulation (HA), leaf accumulation (LA), cold tolerance, and N use efficiency (NUE) in P . plicatulum × P . guenoarum hybrids subjected to N fertilization or grown in a mixture with legumes; (b) compare the grass–legume system to a grass–N fertilizer system; and (c) select the best hybrid for future cultivar releases. A randomized complete block design with three replications and a split‐plot treatment arrangement was used for 2 yr, with five N rates (0, 60, 120, 240, and 480 kg N ha −1 ) and a grass–legume mixture [grass + white clover ( Trifolium repens L.) + birdsfoot trefoil ( Lotus corniculatus L.)] as whole plots, and six genotypes as subplots (hybrids: 1020133, 102069, 103084, 103061; and controls: P . guenoarum 'Azulão' and Megathyrsus maximus 'Aruana'). Higher N rates increased HA, LA, and cold tolerance. Higher NUE was obtained between 60 and 120 kg N ha −1 . In the grass–legume mixture HA was similar to the rates of 60 and 120 kg N ha −1 . Hybrid 1020133 had HA similar to the controls, LA greater than Aruana, and greater cold tolerance and NUE at 60 kg N ha −1 than Azulão and Aruana. Hybrid 1020133 should be selected for further animal performance studies. The agronomic performance of perennial pastures can be improved through N management, and NUE should be a selection criterion in forage breeding.