Resposta e eficiência agronômica em genótipos de milho à adubação nitrogenada no Sul do Pará

Santos, Weder Ferreira dos; Santos, Lázaro Antônio dos; Pelúzio, Joênes Mucci; Pereira, Jefferson da Silva; Reis, Igor Morais dos; Silva, Rafael Marcelino da

doi:10.12661/pap.2019.010

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“…Cancellier et al (2011), while evaluating the N use efficiency and the phenotypic correlation of 24 maize populations in the Southern region of the State of Tocantins, also observed higher yields in environments with high N dose; an environment with low N was 23% less productive. Santos et al (2017) and Santos et al (2018) also verified higher grain productivity in environments where the highest N dose was used. Similar results were also found by Soratto et al (2011), where grain productivity was influenced by N doses, and the application of increasing doses of N in covering provided a quadratic increase in the values of this variable, up to the estimated dose of 124 kg ha -1 , with an increase around 56.8%, in relation to the control treatment, without the application of N in covering.…”

Section: Resultsmentioning

confidence: 84%

Efficiency of nitrogen usage in maize cultivars for grain production

Sousa¹,

Grangeiro²,

Sousa³

et al. 2020

Científica

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Maize plays an important role in the economy and the social and cultural development of several regions in Brazil. However, its productivity is considered low, since the management of nitrogen fertilization and the selection of efficient cultivars in using nitrogen are the main factors responsible for the low productivity of this crop. This study had the purpose to evaluate the efficiency of nitrogen usage in maize cultivars for the production of grains. The experiment was conducted at the vegetable garden at Universidade Federal Rural do Semi-Árido, in the municipality of Mossoró -Rio Grande do Norte state, Brazil. Treatments consisted in the combination of two nitrogen doses (0 and 90 kg N ha -1 ) and three maize cultivars (Cruzeta, Truck and AG 1051). A randomized complete block experimental design was used, in a 2 x 3 factorial arrangement, with five replications. The most productive performance was observed when the evaluated cultivars were fertilized with nitrogen. Based on the values from nutritional indices, cultivar AG 1051 was more efficient in using nitrogen to produce grains.

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Section: Resultsmentioning

confidence: 84%