EFFECTS OF OMISSION NUTRIENTS IN COMPONENTS OF RICE PRODUCTIVITY IN NORTHEASTERN PARAENSE LATOSOLS

Abstract

The present study aims to evaluate the effect of the omission of macro and micronutrients in the growth of rice plants in sandy loam Oxisols and clayey. The experiment was conducted in a greenhouse at the Federal Rural University of Amazonia (UFRA) in the city of Belem-PA. The experimental design was a completely randomized design with 11 treatments and two substrates with different textures (clayey and silty) with three replications. The treatments were: T1) Control; T2) Complete (Liming + macronutrients + B, Zn, Cu, Si, Ni); T3) NPK + B, Zn, Cu, Mn + Si (without lime); T4) N omission; T5) P omission; T6) K omission; T7) Ca omission; T8) Mg omission; T9) Omission of B, Zn, Cu, Si, Ni; T10) Si omission; and T11) Ni omission. The variables evaluated were: leaf dry weight, dry weight of stem and panicle dry mass. The omission of K, P and N directly influenced the production of rice. The deficiency of nitrogen and potassium affect crop production, by restricting the initial growth of the plant.   KEYWORDS: growth, Oryza sativa, plant nutrition.