DRIS norms and limiting nutrients in banana cultivation in the South of Ecuador

Autor: Gilmara Pereira da Silva, Wuellins Durango, Diego Villaseñor, Renato de Mello Prado, Manuel Carrillo
Přispěvatelé: Universidade Estadual Paulista (Unesp), Technical University of Machala (UTMACH), Mato Grosso State University (UNEMAT), Pichilingue Tropical Experimental Station
Rok vydání: 2020
Předmět:
Zdroj: Scopus
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
ISSN: 1532-4087
0190-4167
Popis: Made available in DSpace on 2020-12-12T01:30:47Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-01-01 Foliar analysis is an effective method to diagnose the nutritional status of plants. However, the mineral concentration in foliar tissue has traditionally been evaluated by assessing the activity of each element, without considering the interactions between them. To address this, dual interactions were calculated using the Diagnosis and Recommendation Integrated System (DRIS) to identify which crop nutrients are most influential in nutrient imbalances and which are the most limiting nutrients for the nutritional status of banana crops in Ecuador. To achieve this, a regional survey of the nutritional status and its productivity levels was conducted for 188 different sites during the crop season in 2017–2018, involving banana cultivars ‘Vallery’ and ‘Williams’, from the Cavendish subgroup. The DRIS calculation method was combined with Beaufils and Jones functions. From the initial 188 foliar samples, 83 samples (representing 44% of the population) were considered to represent the high-yield reference population, with yields of 38–60 t ha−1. The DRIS method defined the mean nutritional balance index, which was not found to be statistically correlated (p > 0.05) with productivity, revealing that there was no significant association with the nutritional status of the plants. Specific DRIS norms were obtained and indicated that deficiencies in K, N, Ca, and Fe, and excesses in Mn, B, Cl, Zn, S, Cu, and Mg were the most limiting nutrients for banana cultivars in the south of Ecuador. School of Agricultural and Veterinary Sciences São Paulo State University (UNESP) School of Agricultural Sciences Technical University of Machala (UTMACH) Mato Grosso State University (UNEMAT) National Institute for Agricultural Research (INIAP) Pichilingue Tropical Experimental Station School of Agricultural and Veterinary Sciences São Paulo State University (UNESP)
Databáze: OpenAIRE
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