Bibliographic citations
Tejada, J., (2016). Control de malezas e interacción con dosis de nitrógeno en el cultivo de maíz amarillo duro (Zea mays L.) [Tesis, Universidad Nacional Agraria La Molina]. https://hdl.handle.net/20.500.12996/2845
Tejada, J., Control de malezas e interacción con dosis de nitrógeno en el cultivo de maíz amarillo duro (Zea mays L.) [Tesis]. : Universidad Nacional Agraria La Molina; 2016. https://hdl.handle.net/20.500.12996/2845
@mastersthesis{renati/1116273,
title = "Control de malezas e interacción con dosis de nitrógeno en el cultivo de maíz amarillo duro (Zea mays L.)",
author = "Tejada Soraluz, Jorge Luis",
publisher = "Universidad Nacional Agraria La Molina",
year = "2016"
}
Two field experiments were conducted to determine the interaction between weed control and nitrogen rates (experiment 1) and to establish the best weed control (experiment 2) in Pioneer 30F3, a yellow corn hybrid. This investigation was conducted in a field of the Universidad Nacional Agraria La Molina. Seeds were planted in September 30 th, 2014 and the crop was harvested in March 28 th, 2015. Agronomic management was the same as in the commercial field of yellow corn, except nitrogen rates in experiment 1 and weed control in both trials. In experiment 1, four weed controls were considered (no control, one hand weeding, atrazine 750 g/ha + hand weeding and atrazine 750 g/ha + nicosulfuron 30 g/ha), with four nitrogen levels (0, 160, 200 and 240 kg/ha). In experiment 2, 11 weed control treatments (no control, hand weeding, pendimethalin 800, 1000, 1200 g/ha, atrazine 500, 750, 1000 g/ha and metribuzin 144, 192, 240 g/ha) were considered. Fresh weight, dry weight and weed cover as well as corn height, number of cobs per plant, corn plants/m2 and corn yield were evaluated. Furthermore economic analysis was conducted for each treatment. In trial 1, no interaction was found between weed control and nitrogen rates for any of the characteristics. Atrazine 750 g/ha + hand weeding with four nitrogen levels, resulted in the lowest weed cover (2.159 %), the highest grain yield (13.403 t/ha) and the best income (S/. 5328.913). In experiment 2, the lowest covers were obtained with metribuzin 240 g/ha (5.063 %), pendimethalin 1200 g/ha (3.938 %) and atrazine 750 g/ha (16.625 %). The best yields were obtained with one hand weeding (14.218 t/ha), pendimethalin 1000 g/ha (13.871 t/ha) and atrazine 750 g/ha (14.119 t/ha). The highest income (S/. 5233.350) was obtained with atrazine 750 g/ha.
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