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Efficiency and response to nitrogen application of common bean genotypes grown in lowland tropical rainforest in the state of Tocantins

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Author(s): Sérgio Alves de Sousa | Joedna Silva | Danilo Pereira Ramos | Taynar Coelho de Oliveira | Luiz Antonio de Menezes Gonzaga | Rodrigo Ribeiro Fidelis

Journal: Journal of Biotechnology and Biodiversity
ISSN 2179-4804

Volume: 3;
Issue: 3;
Start page: 31;
Date: 2012;
Original page

Keywords: Phaseolus vulgaris | nutritional stress | genotypes evaluation

ABSTRACT
The common bean is a crop with big socioeconomic interest in many countries, being a crop with high nutrientdemand, mainly nitrogen which is uptaken in big amounts. Thus, it is necessary the adoption of cultivars which areefficient and responsive to nitrogen use. So, this study was carried out in order to evaluate the nitrogen useefficiency and response of common bean genotypes grown in irrigated lowland soil at State of Tocantins. The studywas carried out in two trials (high and low nitrogen level) in a completely randomized blocks design, beingevaluated 25 genotypes in three replications. To simulate environments with low and high N level, doses of 0 and120 kg ha-1 of N were utilized respectively. The genotypes were sorted about nitrogen use efficiency though theirgrain yield. There is difference about nitrogen use efficiency and response to nitrogen application among theevaluated genotypes.
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