The subsoil normally used for guava cuttings production presents low concentration of Zn. Considering the inexistence of information on the subject, it was studied to evaluate the effect of zinc application in the substratum of production of the guava cuttings and, to follow the effect in the development, the production of dry matter and the nutrition status of plants. The experimental design used was randomized blocks with 5 treatments and 5 replications. The doses of zinc were: 0; 2; 4; 6 and 8 mg dm-3 of Zn. All plants received constant doses of N, P, K and B of 300; 100; 150 and 0.5 mg dm-3 of Zn respectively. The experiment was lead in vases with 2.8 dm³ of substratum of a Yellow Red Argissolo (Ultisol). After 135 days of planting, it was evaluated: height, foliar area, dry matter, nutritional status of plants and soil nutrients. The guava had answered positively to zinc application. The biggest development of the plants was associated with 2 mg dm-3 of Zn dose. The equal or upper doses 4 mg dm-3 of Zn had presented significant reduction in the growth and the accumulation of macronutrients in the guava cuttings.
Zn; guava; Psidium guajava
