Abstract
The response of potato plants to banding and broadcasting of N was evaluated under sprinkler irrigation utilizing well water containing 20 to 24 ppm NO3-N. A potato crop was grown for three consecutive years on a Wasco sandy loam soil at rates of 67, 134, 202, and 269 kg N/ha, as (NH4)2SO4. At each rate of N, 58 kg P/ha as superphosphate, and 112 kg K/ha as K2SO4, were included.
Differences in PO4-P or K concentrations in petiole tissue were minimal with no consistant differences in NO3-N concentration whether N was banded or broadcast. With each increment of N the NO3-N concentration increased. Total or U.S. No. 1 yields of potatoes were not consistently different whether N was banded or broadcast. Total yields increased when N was increased from 67 to 202 kg/ha. Neither yield of U.S. No. 1 grade or dry matter content of potatoes was improved when N was increased above 134 kg/ha.
Resumen
La respuesta de plantas de papa al nitrógeno aplicado en bandas o al voleo fue evaluada en condiciones de riego por aspersión con agua de pozo que contenía 20 a 24 ppm NO3-N. Se cultivó papa durante tres años consecutivos en suelo Wasco franco arenoso con dosis de 67, 134, 202 y 269 kg/ha de N como (NH4)2SO4. A cada dosis de N, se agregaron 58 kg/ha de P como superfosfato y 112 kg/ha de K como K2SO4.
Las diferencias en las concentraciones de PO4-P o K en el tejido peciolar fueron minimas sin diferencias consistentes en las concentración de NO3-N con N aplicado en bandas o al voleo. Con cada incremento de N, aumentó la concentración de NO3-N. Los rendimientos totales o de papa de primera no variaron en forma regular dependiendo de si el N fuera aplicado en banda o al voleo. Los rendimientos totales aumentaron cuando se incrementó el N de 67 a 202 kg/ha. Al aumentar el N a más de 134 kg/ha no mejoró el rendimiento de papa de primera clase de los EE.UU., ni el contenido de materia seca de la papa.
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Contribution of the Department of Vegetable Crops and Cooperative Extension Service, University of California, Davis, California, 95616.
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Timm, H., Bishop, J.C., Tyler, K.B. et al. Plant nutrient uptake and potato yield response to banded and broadcast nitrogen. American Potato Journal 60, 577–585 (1983). https://doi.org/10.1007/BF02854107
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DOI: https://doi.org/10.1007/BF02854107