Examination of the nutrient uptake by the rice plant (Oryza sativa L.) under calcareous soils

Abstract

The present work deals with the studies on the rice plant growth in the calcareous soils and survey of nutrients uptake by rice plant in these soils. The experiments were carried out in split- split plot design in randomized complete block with 3 blocks including 20 treatments. The experimental soil pH is 7.62 that can be categorized as calcareous soil indicating a sufficient amount of lime (CaCO₃) present in the soil (16.7%). Ca⁺² and Mg²⁺ availability are excessive in this condition. Ca and Mg content in the grain were more than average range in the untreated plot (0.61 and 0.47%, respectively).  It was found that using S powder and sulfate fertilizers decreased Ca and Mg uptake by the grain. The minimum Ca (0.33%) and Mg (0.14%) content were attained at treatment no. 17 (NPK + S powder + Zn sulfate). N, P, K and Na uptake increased marginally by the rice grain when NPK, S and Zn, Cu and Mn-fertilizers (treatment no. 20) applied which is in the similar ranges compared to no.17. Thus treatment no.17 is the best treatment for this proposes.