Effect of nitrogen and phosphorus fertilization sources on the potato crop yield (Solanum tuberosum L.)

Abstract

Potato (Solanum tuberosum L.) is a demanding crop regarding fertilization practices, and its productivity also depends on the variety used, environmental conditions, soil fertility, and crop management. The aim of this study was to investigate the effect of the interaction of nitrogen and phosphorus fertilization sources on potato crop yield. A randomized block design with a 3×3 factorial arrangement, nine treatments, and four repetitions was established. INIA-303 Canchan was the variety evaluated using three nitrogen fertilization sources: ammonium nitrate (AN), ammonium sulfate (AS), and urea. Also, three phosphorus sources were used: monoammonium phosphate (MAP), diammonium phosphate (DAP), and triple superphosphate (TSP). Total yield, commercial yield, tuber number per plant, and tuber weight per plant were studied. INIA-303 Canchan variety showed positive responses to the combinations of nitrogen and phosphorus fertilization according to the soil and climate conditions where the research was carried out. AN+DAP was the combination with the highest total yield, commercial yield, number, and weight of tubers per plant (P<0.01).The fertilization mixtures of AN+DAP, AS+MAP, and AN+MAP, applied on the INIA-303 Canchan potato variety, can be recommended to achieve yields between 32.45 t ha-1 and 33.98 t ha-1

EFECTOS DE LAS FUENTES NITROGENADAS EN LA MORFOFISIOLOGÍA, PRODUCCIÓN Y CALIDAD DE CACAO (Theobroma cacao L.) CCN-51 EN EL SUR DE LA AMAZONIA ECUATORIANA

“…A pesar de la creciente evidencia sobre el aumento de la eficiencia del uso del nitrógeno, a través del manejo del cultivo, como el momento y cantidad correcta de aplicación del fertilizante (Olson and Swallow, 1984, Wuest and Cassman, 1992, Morais, 1998, Romero-Lozada et al, 2016, Rosas-Patiño et al, 2017, pocas investigaciones se han realizado para examinar si la fuente nitrogenada mineral puede mejorar el rendimiento y calidad de los cultivos, así como mejorar los ingresos de los productores y mitigar la contaminación ambiental, especialmente en ecosistemas amazónicos. Algunos trabajos indican que existe influencia significativa en el crecimiento y producción de acuerdo a la fuente nitrogenada aplicada a los cultivos de maíz, papa, arroz, trigo, verdolaga entre otros (DeAndrade, et al, 2009, Kaymak, 2013, Pineda-Taco et al, 2020, Yan et al, 2020, Alsam et al, 2021. Granja and Covarrubias (2018), reportan disminuciones de pH a nivel del suelo e incremento de clorofila en aguacate cultivado en suelos calcáreos al aplicar sulfato de amonio en comparación con urea y nitrato de calcio.…”