Yield performance of upland rice cultivars at different rates and times of nitrogen Application.

Nitrogen is the most important nutrient for rice (Oryza sativa L) yields. This study aimed to evaluate the response of upland rice cultivars to N rate and application times in a randomized block design, in subdivided plots with four replications. The studied factors were five rice cultivars (BRS MG Curinga, BRS Monarca, BRS Pepita, BRS Primavera, and BRS Sertaneja), three application times (100 % at planting, 50 % at planting - 50 % at tillering and 100 % at tillering) and four N rates (0, 50, 100, and 150 kg ha-1). All cultivars responded to increased rates and different times of N application, especially BRS Primavera and BRS Sertaneja, which were the most productive when 50 % N rates were applied at sowing and 50 % at tillering. The response of cultivar BRS Monarca to N fertilization was best when 100 % of the fertilizer was applied at tillering.

Bibliographic Details

Main Authors:	BARRETO, J. H. B., SOARES, I., PEREIRA, J. A., BEZERRA, A. M. E., DEUS, J. A. L. de
Other Authors:	JOSÉ HILDERNANDO BEZERRA BARRETO, UFC; ISMAIL SOARES, UFC; JOSE ALMEIDA PEREIRA, CPAMN; ANTONIO MARCOS ESMERALDO BEZERRA, UFC; JOSÉ ARIDIANO LIMA DE DEUS, UFC.
Format:	Artigo de periódico biblioteca
Language:	English eng
Published:	2012-05-28T11:11:11Z
Subjects:	Adubação nitrogenada, Componentes de produção., Oryza Sativa.,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/925505
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