Efectos Del Enriquecimiento Con Selenio en Spad, Calidad De La Fruta Y Parámetros De Crecimiento De Plantas De Fresa en Un Sistema De Cultivo Sin Suelo

Abstract

EfEctos dEl EnriquEcimiEnto con sElEniorEsumEn -El selenio es un elemento traza esencial no solo para animales, plantas y microorganismos, sino también para la salud de las personas. Por ello, parece que aumentar las cantidades de selenio en plantas puede tener implicaciones positivas. El objetivo de este trabajo fue determinar en un sistema de cultivo sin suelo con fibra de coco el efecto del selenito (Se IV) y selenato (Se VI) en el peso, calidad de las frutas de fresa, así como en variables de crecimiento y contenido de clorofilas de las hojas jóvenes y adultas de la planta de fresa de la variedad 'Splendor'. Los tratamientos fueron: T1 Se(IV)F (foliar), T2 Se(IV)S (sustrato), T3 Se(VI)F, T4 Se(VI)S y T5 control (sin aporte de Se). Se aplicaron semanalmente las mismas concentraciones de Se(IV) y Se(VI). Los resultados del análisis mostraron que el efecto de los tratamientos sobre firmeza, sólidos solubles totales y acidez titratable en frutas fue significativo. Los valores más altos de firmeza y sólidos solubles fueron mostrados por el tratamiento T4. Los mayores valores para el pH se producen en los tratamientos con T2 y T4. Los resultados indican que el Se tiene un efecto positivo sobre los valores de SPAD en hoja vieja. Las plantas con tratamiento de selenio presentaron un mayor número de hojas en relación a las plantas control. términos para indexación: Fragaria x ananassa Duch. Sólidos solubles totales. Cultivo sin suelo. Ácido titratable. ºBrix. EffEcts of sE-EnricHmEnt on sPAd, fruit quAlity And GroWtH PArAmEtErs of strAWBErry PlAnts in soillEssGroWinG systEm ABstrAct -Selenium (Se) is an essential trace element for animals, plants, microorganisms and human health. Thus, it appears that increasing amounts of Se in plants could have positive implications. The aim of our study was to evaluate the influence of foliar and substrate application of selenite (Se IV) and selenate (Se VI) on weight, fruit quality, growth parameters and content of chlorophyll from old and new leaves of strawberry plants (Fragaria x ananassa Duch.) cv. 'Splendor' in a soilless growing system with coir fiber as substrate. The treatments were: T1 Se(IV)F (foliar), T2 Se(IV)S (substrate), T3 Se(VI)F, T4 Se(VI)S and T5 control (Without application of Se). The same concentrations of Se(IV) and Se(VI) were applied weekly.The results of analysis showed that the effect of treatments on firmness, total soluble solids and titratable acidity in fruit were significant. The highest values of firmness and total soluble solids were showed by treatment T4 Se(VI)S. T2 and T4 treatments showed the highest pH values. The results indicate that Se has a positive effect on SPAD values on old leaf. The strawberry plants with selenium tretaments has higher number of leaves than control plants. index terms: Fragaria x ananassa Duch. Total Soluble Solid. Soilless. Titratable acidity. ºBrix.

Humic substances and rhizobacteria enhance the yield, physiology and quality of strawberries

“…For the SPAD units, no significant differences were observed with the application of treatments to strawberry plants. These results coincide with Palencia et al (2016), in a study carried out to evaluate the quality in strawberry cultivation, when measured the plants, there were no significant differences in SPAD readings among their treatments. However, these results differ from what was found by Lovaisa et al (2015), using strawberry plants cultivar Fortuna, which were inoculated with Azospirillum brasilense, when evaluating the chlorophyll content in SPAD units, a positive effect was observed in leaves from inoculated plants; they reported a 32% increase compared to the non-inoculated control.…”

Water use efficiency in four irrigation regimes in bulb onion production in the Alto Chicamocha Irrigation District

“…The chlorophyll results agreed with those obtained by (Palencia et al, 2016), especially in the later weeks of the analysis, where the SPAD units measured in old leaves had similar values, in the range of 60 and 80 s. The significant increase in the later weeks was evidence of the fertilization response of bulb filling, which was carried out in week 9, with the physiological response detected in weeks 10 and 11 (Arjona et al, 2004;Medellín et al, 2011).…”

<b>Influence of sulfur on selenium absorption in strawberry

“…In the present study, we observed beneficial effects of Se fertilization on strawberry crops, which were reflected by the significant accumulation of Se in shoots and fruits, and increased fruit production (Figures 2 and 5). A positive response to Se application in strawberry was verified by Palencia et al (2016), who observed an increase in growth and fruit quality when selenite and selenate was applied in hydroponic cultivation.…”

“…In Brazil, strawberry production has increased in recent years, leading small farmers to grow a product of high added value. However, few studies aimed at investigating the nutritional benefits of Se in this culture have been conducted (Zhang, Zhang, & Rui, 2013;Palencia, Martinez, Burducea, Oliveira, & Giralde, 2016).…”