Resumen

FLORES-LOPEZ, Román et al. Evaluation of hydroponic nutrient solutions on potato genotypes in a greenhouse. Rev. Mex. Cienc. Agríc [online]. 2025, vol.16, n.3, e3296.  Epub 12-Ago-2025. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v16i3.3296.

High densities of potato crops in a greenhouse, genotype, and environmental conditions affect its productivity, and a factor that positively influences is nutritional contribution. The objective of this research was to determine the optimal nutrient solution for the production of minitubers in 12 potato genotypes, 11 generated by INIFAP and the Fianna Dutch variety. The following nutritional solutions N-P-K-Ca (mg L-1) was formulated: a) 200-80-300-100, b) 200-80-350-100, c) 200-80-450-100 and 160-60-250-150 as a control, added with micronutrients, in autumn-winter 2015 and spring-summer 2016. Perlite as a substrate and random complete blocks. The autumn-winter cycle was more productive than the spring-summer cycle. The tallest plants were Granate, Milagros and Modesta. All genotypes exceeded the leaf area index from six to 80 days of cultivation and the SPAD index was different among them. Citlali, Granate and Nau, showed a higher harvest index, 0.79, 0.78 and 0.77, respectively. In contrast, in the rest of the varieties, it was less than 0.7. The varieties with the highest number of tubers per plant were Real 14 and 99-39 with 29.3. For their part, the genotypes with the highest fresh tuber weight per plant were 99-39, Nau, Bajío and Fianna, with 379.3, 349.7, 349.3, and 333.7 g, respectively. The production of minitubers >15 mm was higher in autumn-winter and the 200-80-450-100 solution produced more tubers per plant. Treatments with 350 and 450 mg L-1 potassium promoted a greater number of tubers in 10 of the 12 genotypes evaluated.

Palabras llave : Solanum tuberosum; greenhouse; hydroponics; minitubers.

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