Acúmulo de nutrientes em copo-de-leite em fase inicial de cultivo

Abstract

Calla lily cropping presents an important role in floriculture, but the knowledge of nutrient absorption and accumulation in the different plant developmental stages or the nutrient requirement are enough. This information allowed an adequate fertilizer application, according each physiological stage, resulting in a more cost-effective crop production. The objective of the present work was to determine the physiological behavior of calla lily (Zantedeschia aethiopica) growth and flowering evaluating the nutrient requirement and establishing the macro and micronutrient accumulation curves. Micropropagated and acclimatized calla lily seedlings were cultivated in pots containing coconut fiber substrate with a modified fertilization (Malavolta, 1985). Evaluations performed at 30-day intervals for 7 months, that consisted in the treatments. The experimental design was a randomized block design, with three replicates, in a total of 28 plots. Plants were evaluated observing growth and development features of shoots, rhizome, roots as well as yield and flower numbers, nutrient content and accumulation in all plant parts. The plant developed increasing throughout the experimental period. The maximum nutrient accumulation occurred at the end of the experimental period, coinciding with the maximum total dried mass content. The macronutrient extraction occurred in the sequence K>N>Ca>P=S>Mg, and micronutrient, Zn>Mn>Fe>B>Cu. The mineral composition of all plant parts were influenced by the time, as well as the growth.