The aim of this research is to evaluate the effect of foliar application of salicylic acid (SA) on the yield and phytochemical content in hydroponically grown cucumber (Cucumis sativus L.). (1) Background: The importance of Mexico’s cucumber production is based on its cultivation in recent decades as one of the major winter crops; in addition, the production of vegetables under hydroponic systems has increased significantly during the last few years, with cucumber being one of the vegetables with a high economic potential. (2) Methods: A completely randomized experimental design with 15 repetitions was used. SA at five doses (0.075, 0.1, 0.15, 0.25, and 0.5 mM) and one control (distilled water) was sprinkled weekly on cucumber plants. The evaluated variables were yield (total fruit weight per plant), fruit parameters (length, size and firmness), and nutraceutical quality of cucumber. (3) Results: Low concentrations of SA improve the yield and high concentrations decrease it, but the nutraceutical quality of fruits is improved, as compared to the control treatment. (4) Conclusions: In order to obtain a higher content of bioactive compounds without affecting the yield and commercial quality of cucumber fruits, it is advisable to use the average concentration (0.15 mM) of SA.
Introducción: Los estudios bibliométricos aplicados a las revistas científicas constituyen instrumentos que permiten evaluar el desempe˜no e impacto de estas. Objetivo: Analizar los artículos publicados en la revista Investigación en Educación Médica en el período 2012-2016. Método: Se realizó un estudio bibliométrico descriptivo-retrospectivo de los documentos publicados en el período 2012-2016. Las variables estudiadas fueron: total de números, total de artículos, citas, promedio de citas por a˜no, promedio de citas por artículos, promedio de citas por autores, promedio de citas por autores por a˜no, promedio de artículos por autor, promedio de autores por artículo, índice h, índice g, índice h contemporáneo (hc), índice hI, índice hI normalizado, índice AWCR, índice AW, índice AWCRpA, índice e, índice hm, índice hI anual, cobertura H, cobertura G, tipología documental, afiliación de los autores, índice de colaboración, referencias bibliográficas, grado de actualidad de las referencias bibliográficas según el índice de Price e idiomas de las referencias bibliográficas. Se calcularon los indicadores cienciométricos mediante el software Harzing’s Publish or Perish 5, tomando como base de datos el Google Académico. Resultados: La revista ha recibido 330 citas y posee un índice h igual a 7. Se publicaron 280 artículos (100 originales), con una media de 56.0±33.05 por a˜no. El artículo más citado obtuvo 37 citas (12.33 citas por a˜no) y estuvo relacionado con la técnica de grupos focales. Los países con mayor cantidad de artículos fueron: México con 156, Espa˜na con 6, así como Estados Unidos y Chile con 5. Se contabilizaron 550 autores firmantes y el índice de colaboración fue de 2.86. Se revisaron 3,465 referencias bibliográficas (68.57% en inglés); el promedio de referencias por artículo fue de 18.05±13.49. El índice de Price osciló entre 0.24 y 0.67, con un promedio de 0.31. Conclusiones: Las secciones «Artículos Originales» y «Resúmenes» sobresalen como las tipologías documentales más utilizadas. El artículo más citado estuvo relacionado con la técnica de grupos focales. Existió predominio de autoría mexicana, así como de artículos realizados por un solo autor y referencias en idioma inglés. El índice de Price mostró un valor comparable con el de otras revistas de alto impacto.
The productivity of pastures and forage is increasingly limited due to climate variability and prolonged drought periods. For that reason, it is necessary to cultivate plants that are tolerant and productive under conditions of seasonal drought. The objective of this work was to characterize the agronomic and productive performance of new drought tolerantCenchrus purpureus cultivars. Three cultivars (CT-601, CT-603, and CT-605) were used at different regrowth ages (60, 80, 100, and 120 days) in two climatic periods: rainfall and low rainfall from 2013 to 2014 in a representative ecosystem of Cauto Valley, Cuba. The cultivars were grown on Vertisol and were fertilized with organic fertilizer at a rate of 25 t/ha. Some agronomic variables and dry matter (DM) yield (t/ha) were evaluated under rainfed conditions. A randomized block design with factorial arrangement and its interaction (3x4x2) was used. DM yield was affected by the second order interaction, during the period of rainfall, CT-605 at the age of 120 days reached the best average (p≤0.001) and during the period of low rainfall, CT-603 and CT-605 were highlighted (p≤0.001). Weather-season interaction on cultivars had a significantly positive impact (p≤0.001) on the length of leaves of CT-601 in the period of rainfall. CT-605 increased (p≤0.001) the percentage of leaves and green stems in the period of rainfall, superscripts were equalized in the dry season. Cultivars showed an acceptable DM yield during the low rainfall period, morphological changes neither affected the development nor the productivity.
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