Critical nitrogen and potassium levels and sufficiency ranges for banana cultivation in Ecuador

Villaseñor-Ortiz, Diego; Prado, Renato de Mello; Luna-Romero, E.; Jaramillo-Aguilar, E.; Agurto-Rodriguez, L.

doi:10.17660/th2022/002

Cited by 2 publications

(1 citation statement)

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“…In these circumstances, the assessment of the nutritional status for bananas, shows states of su ciency, de ciency, or toxicity of nutrients that directly interfere with fruit productivity 3 . For this, the use of diagnostic methods that compare the results of leaf levels of nutrients in a sample with the appropriate nutritional standards obtained in crops with a high productivity is essential 4 , and may help in designing e cient nutrient management practices for improved crop yield 5 . This procedure for interpreting leaf nutritional values for bananas has traditionally been based on the standards critical level (CL) and/or su ciency range (SR) 6 , where, according with these authors, each nutrient is considered alone (univariate relationship) and not considering possible interactions between them 7 .…”

Section: Introductionmentioning

confidence: 99%

New Approach to the Applicability of DRIS in Bananas Based on the Accuracy of Nutritional Diagnoses for Nitrogen and Potassium

Villaseñor-Ortiz

Prado

Silva

et al. 2022

Preprint

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DRIS (Diagnosis Recommendation Integrated System) is a tool used in the interpretation of leaf analyses that values the balance of nutrients, an important fact for a better assessment of the nutritional status of banana plants. Its usefulness depends on the ability to identify the nutrients that limit productivity in order to correct possible nutritional imbalances, but there is a lack of research in all crops, including bananas, to assess the accuracy of these diagnoses, which have a worrying global implication. To this end, this study evaluates DRIS norms for banana cultivation in Ecuador and the use of accuracy measurements for nutritional diagnosis, verifying the capacity of DRIS to detect true nutritional status based on plant response. The database created here contains 233 results referring to productivity and leaf contents of N, P, K, Ca, Mg, S, Cl, Fe, Mn, Cu, B, and Zn for banana trees in 2018, 2019, and 2020. Then, a field experiment evaluated doses of nitrogen and potassium and the accuracy of DRIS norms for N and K. The results show that the DRIS of banana produced in Ecuador depends on the nutrient being variable according to the crop nutritional status. The DRIS norms for diagnosis of N and K result in an acceptable accuracy to identify only deficiencies and toxicities, respectively, indicating the need for adjustments in these standards for later use in the field. Thus, there is a need for more research aiming to adopt calibrated DRIS diagnostic norms to assess the nutritional status of bananas in Ecuador.

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Section: Introductionmentioning

confidence: 99%