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,José Hildernando Bezerra, Soares,Ismail, Pereira,José Almeida, Bezerra,Antonio Marcos Esmeraldo, Deus,José Aridiano Lima de
Format:	Digital revista
Language:	English
Published:	Sociedade Brasileira de Ciência do Solo 2012
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000200017
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