Mineral nutrition of vegetable crops: XIX. absorption of macro and micronutrientes by okra plants

Abstract

Plants of the varieties. - Campinas 1 and Green Velvet, were cultivated under nutrition solution conditions (SARRUGE, 1970). Periodically, every 10 days, from the 10th day up plants were harvested, divided into stalks, leaves, flowers, fruits and analysed for N, P, K, Ca, Mg, S, B, Cu, Fe, Mn, Zn and Mb. Conclusions: Okra plants of the variety Campinas 1 showed a higher dry matter production in confront with the variety Green Velvet at the final stage of growth; The extraction of nutrients by plants of both varieties was rather small until the age of 20 days; The extraction on K by the variety Green Velvet was superior in 100% when compared to the variety Campinas 1. The variety Green Velvet has a greater demand in macronutrients than the variety Campinas ¹; In contrast the variety Campinas 1 extracted superior quantities of the micronutrientes than the variety Green Velvet. On ha of okra plants (20,000) removed the following quantities in nutrients: