Management of nutrient constraints in passionfruit (Passiflora edulis Sims.)
Passionfruit is commercially grown in tropical and subtropical climates of northeast and south India. The predominant soil types are Alfisols and Ultisols have varying proportions of nutrient constraints in form of N, P, Ca, Mg and Zn. Leaf analysis based fertilizer scheduling is considered the most appropriate method. The fourth axillary leaf from the growing tip of a fruit bearing shoots or alternatively leaves with an axillary flower bud are widely used for nutrient sampling. These leaves are used for diagnostics purposes to establish site specific nutritional problems. Various methods of mitigating nutrient constraints based on nutrient removal pattern, fertilizer and fertigation response studies are suggested in this paper.
Ndang, M., Pongener, K.A. and Alila, P. (2017). Management of nutrient constraints in passionfruit (Passiflora edulis Sims.). Acta Hortic. 1178, 25-30
nutrient diagnosis, leaf analysis, NPK recommendation