Omissão de nutrientes em plantas de pinhão-manso cultivadas em solução nutritiva

Abstract

Jatropha curcas L. belongs to the Euphorbiaceae family. It is an oleaginousplant and it has received much attention because of the production of biofuels. The objective of this study was to evaluate the nutritional status of Jatropha curcas under deficiency of macro and micronutrients in nutrient solution. The experimental design was completely randomized with thirteen treatments and three replications. The treatments consisted of a complete solution and individual omission of each of the following nutrients: N, P, K, Ca, Mg, S, B, Cu, Mn, Mo, Zn or Fe. The decreasing order of production restriction of dry matter was N>Mg>S>K>Ca=P>Zn>B=Fe. Omissions of N and P affected mots the contents of macronutrients in the shoots of physic nut and the deficiency symptoms observed were chlorosis, reduced growth and deformed leaves.