Acumulação de micronutrientes em plantas de pinhão-manso (Jatropha curcas L.) nutridas com composto orgânico Accumulation of micronutrients in pinhão-manso plants (Jatropha curcas L.) nourished with organic compound

This study aimed to evaluate the concentration of micronutrients in jatropha, fertilized with organic manures originating made by mixing seed cake and fruit shell of jatropha in different proportions and dosages. Studied the effects of two types organic manures: manure-1 (20% cake and 80% shell of Jatropha curcas L.), manure-2 (60% cake and 40% shell of Jatropha curcas L.) and six doses of each manure (0, 10, 20, 30 , 40, 50 % v/v) mixed to the original substrate. The results showed that increasing the concentration of the manure-1 in the substrate increased the concentration of micronutrients in the plants of jatropha, while the corresponding increase in the concentration of the manure-2 in the substrate affected negatively the accumulation of micronutrients in the plants, and the decreasing order of preferential accumulation of micronutrients found in this study with plants of jatropha was: Fe>Mn>B>Zn>Cu.