NDLI: Phosphorus Fertilizer Rate for Fresh Market Potato Cultivars Grown in Tropical Soil with Low Phosphorus Availability

Content Provider	Springer Nature Link
Author	Fernandes, Adalton M. Soratto, Rogério P.
Copyright Year	2016
Abstract	Knowledge on phosphorus (P) response of main potato cultivars is essential to rational fertilization management and maximize yield, mainly in tropical soils that usually have low P availability. An experiment was conducted to evaluate the effect of P fertilization rates (0, 125, 250, 500, and 1000 kg P$_{2}$O$_{5}$ ha$^{−1}$) on leaf nutrient concentrations, tuber yield and size distribution, as well as applied P-use efficiency (APUE) in the potato cultivars Agata and Mondial. The results indicated that it is not necessary to evaluate the P-nutritional status and adjust P recommendations on a cultivar basis because P fertilization resulted in similar increases in the leaf P concentration of both cultivars, and the cultivars responded to the same P rate (500 kg P$_{2}$O$_{5}$ ha$^{−1}$). However, Mondial had a higher APUE and was more responsive than Agata to the same P rate. A leaf P concentration of 2.9 g kg$^{−1}$ was superior to 2.5 g kg$^{−1}$ as the lower limit of the P sufficiency range for Agata and Mondial.El conocimiento de la respuesta al fósforo (P) de las principales variedades de papa, es esencial para un manejo racional de la fertilización y maximizar el rendimiento, principalmente en suelos tropicales que usualmente tienen baja disponibilidad del P. Se condujo un experimento para evaluar el efecto de los niveles de fertilización con P (0, 125, 250, 500, y 1000 kg P$_{2}$O$_{5}$ ha$^{−1}$) en concentraciones del nutriente en la hoja, rendimiento de tubérculo y distribución de tamaños, así como la eficiencia del uso del P aplicado (APUE) en las variedades de papa Agata y Mondial. Los resultados indicaron que no es necesario evaluar el estatus del P nutricional ni ajustar las recomendaciones de P con base a la variedad, porque la fertilización con P dio como resultado incrementos similares en la concentración de P en la hoja de ambas variedades, y éstas respondieron a la misma concentración del P (500 kg P$_{2}$O$_{5}$ ha$^{−1}$). No obstante, Mondial tuvo una APUE más alta y respondió más que Agata a un mismo nivel de P. Una concentración foliar de P de 2.9 g kg$^{−1}$ fue superior a 2.5 g kg$^{−1}$ como el límite más bajo del rango de suficiencia de P para Agata y Mondial.
Starting Page	404
Ending Page	414
Page Count	11
File Format	PDF
ISSN	1099209X
Journal	American Potato Journal
Volume Number	93
Issue Number	4
e-ISSN	18749380
Language	English
Publisher	Springer US
Publisher Date	2016-03-16
Publisher Institution	Potato Association of America
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Solanum tuberosum Applied P-use efficiency Foliar diagnosis Tuber number Tuber size Tuber yield Plant Sciences Agriculture Plant Genetics & Genomics Plant Breeding/Biotechnology Plant Pathology
Content Type	Text
Resource Type	Article
Subject	Plant Science Agronomy and Crop Science

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