Obtenção de normas DRIS preliminares e faixas de suficiência para bananeira do subgrupo prata na região do

Le résumé fourni par la source

For the success of nutritional diagnosis, it is important that the nutritional evaluation of a plant be based on local data, with the Diagnosis and Recommendation Integrated System (DRIS) being used as an alternative. The objective of this study was to establish preliminary DRIS norms for banana crops in the region of the Lower Jaguaribe, in the state of Ceara (CE), using a database of the results of foliar analysis. A total of 487 DRIS norms were generated for the region of the Lower Jaguaribe from 171 results of foliar analysis relating to the irrigation districts of Jaguaribe-Apodi (DIJA) and Tabuleiro de Russas (DISTAR). Reference values were obtained from the dual relationship between nutrients, transformed by natural logarithm, and their mean values and standard deviations calculated. The frequency of results for a deficiency or excess of each nutrient was determined from the DRIS indices obtained. The specific DRIS norms for each site showed differences when compared to those generated from all the data. The diagnoses generated by the specific norms agreed by less than 60% in comparison to those obtained using reference norms from the literature. The DRIS norms obtained need to be validated using data from commercial production, as well as from fertilizer trials.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.