Understanding micronutrient uptake in guava cuttings guarantees efficient fertilization. This research was undertaken to measure micronutrient uptake in cuttings from two guava cultivars. The experimental design was arranged in split-plots with three replications. Plots were represented by herbaceous cuttings from the guava cultivars 'Paluma' and 'Século XXI', while split-plots were the seven sampling dates during a 120-day period in nutritive solution. Accumulation of micronutrients was determined in the different plant organs every two weeks. The guava cultivar 'Século XXI' has higher micronutrient requirements than 'Paluma'. The mean micronutrient accumulation followed the order: Fe>Mn>Zn>B>Cu. The accumulation of B, Cu, Mn and Zn was higher in leaves, while Fe was more accumulated in roots. Micronutrient accumulation in the cultivars 'Paluma' and 'Século XXI', in µg per plant, was (respectively): B: 632 and 783; Cu: 134 and 158; Fe: 8103 and 5534; Mn: 3052 and 3709; and Zn 760 and 997.
Psidium guajava; mineral nutrition; micronutrient accumulation; nutritional requirement; nutrient solution
