Crop response of greenhouse soil-grown cucumber to total available N in a Nitrate Vulnerable Zone
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URI: http://hdl.handle.net/10835/14654
DOI: https://doi.org/10.1016/j.eja.2019.125993
DOI: https://doi.org/10.1016/j.eja.2019.125993
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Gallardo Pino, Luisa; Padilla Ruiz, Francisco Manuel; Peña-Fleitas, María Teresa; De Souza Ibarra, Stefani Romina; Rodríguez, Alejandra; [et al.]Date
2020-03Abstract
Intensive vegetable production in soil is commonly associated with low N use efficiency (NUE) and consequently appreciable N losses that have negative environmental impacts. Improved N management practices for intensive vegetable crops require detailed knowledge of crop response to N supply. This study evaluated the effects of increasing total available N (TAN, i.e. the sum of soil mineral N at planting, N mineralized from organic matter, and mineral fertilizer N applied by fertigation) on cucumber grown in soil in a greenhouse. Parameters assessed were: yield, dry matter production (DMP), crop N uptake, nitrogen use efficiency (NUE) and potential NO3− leaching loss. The study was conducted in three growing seasons, in autumn, spring and late spring. Three commercial cultivars were examined, in the Late Spring crop, to assess possible cultivar differences. Five N treatments were applied, in the Autumn and Spring crops, as different N concentrations in nutrient solution that were applie...