Use of the Integrated Diagnosis and Recommendation System and Sufficiency Band for Nutritional Status of Conilon Coffee

Abstract

Knowing the nutritional conditions of the crop is an important factor to understand its development, indicating the leaf nutrient contents and making possible correlations with the productivity in order to equate the presented variations. The objective of this paper was to diagnose the most limiting nutritional factors to obtaining high yields by Diagnosis And Recommendation Integrated System (DRIS) method and sufficiency ranges for conilon coffee culture. In the coffee crop of the variety Robusta Tropical - Emcaper 8151, located in the county of Cachoeiro de Itapemirim - ES, an irregular mesh was built, with 140 georeferenced points. To obtain the data of the leaf analysis at each point, two pairs of leaves of the lateral branches were collected at the average height of each plant at the 4 cardinal points. In the interpretation of the foliar analysis results by the DRIS method, indexes were calculated for each nutrient of each sample and for the evaluation by the sufficiency range, tabulated values ​​were used. The Diagnosis by DRIS and the Range of sufficiency determined P, Fe, Zn and S as the most limiting nutrients by deficiency. The DRIS method showed greater sensitivity when assessing nutrient deficiencies. Showing lower N limitation and showing difference between Fe and K deficiencies.