Effect of humic substances and nitrogen fertilization on yellow passion fruit cultivation in the Brazilian semiarid region

Abstract

Fruit production of yellow passion fruit (Passiflora edulis Sims. f. flavicarpa Deg.) is affected by several factors, such as climate, soil and agricultural practices, including fertilization and irrigation, which are essential for high crop yield. Thus, an experiment was carried on to evaluate the effect of humic substances and different nitrogen doses supplied through fertigation on fruit production of yellow passion fruit in Brazilian semiarid. The experiment was carried on from December 2012 to December 2013 on Curaçá irrigation area, Juazeiro County, Brazil. The experimental design was randomized complete block in a split plot arrangement, considering humic substances (absence and presence) as main plots and N doses (180, 200, 260, 330 and 350 kg ha-1 yr-1 of N) as subplots with five replications and six plants in each parcel. The interaction of nitrogen doses and humic substances affected foliar nitrogen concentrations, stem diameter, production per plant and yield. No isolated effect of humic substances on any variable studied was significant. The higher yellow passion fruit yields are recorded at 290 and 350 kg ha-1 N doses without and with humic substances, respectively.

Humic acids induce the expression of nitrate transporters in passion-fruit seedlings

“…As well as the significant improvement in the general nutritional state of passion fruit trees treated with biofertilizers (SILVA JÚNIOR et al, 2013). The maintenance of production levels of passion fruit with a smaller amount of N-urea in the presence of HS has also been observed (SILVA et al, 2016) without significant changes in the industrial quality of the fruit (SILVA et al, 2015). Therefore, the effect of HS on the activity of the H + -ATPases is compatible with the results of improvement in the nutritional state of passion fruit observed previously.…”

Efecto de la fertilización orgánica y densidad para la producción de granadilla Passiflora ligularis Juss eco tipo Colombiana en la Comunidad Campesina San Miguel de Tabaconas

“…F. Flavicarpa Deg.) se ve afectada por varios factores, como el clima, el suelo, las prácticas agrícolas, incluida la fertilización y el riego, que son esenciales para un alto rendimiento de los cultivos (Silva et al, 2016). Factor a tener en cuenta también lo investigado por Suárez et al, (2016) en sus resultados demostró que P. ligularis es una especie autofértil, pero el flujo génico y la productividad dependen de los agentes polinizadores.…”

“…ha -1 N sin y con sustancias húmicas, respectivamente. Silva et al, (2016). Igualmente, la aplicación de fertilizante de potasio en los tratamientos de riego deficitario aumentó el rendimiento respecto al control (Bahrani y Pourreza, 2016).…”