Crecimiento y desarrollo del fruto de lulo (Solanum quitoense Lam.) en el municipio de San Antonio del Tequendama (Colombia)

Abstract

<p>En el municipio de San Antonio del Tequendama (Cundinamarca, Colombia) se esta incentivando la siembra del cultivo de lulo, pero se desconocen muchos aspectos relacionados con la fisiologia y el manejo de la especie en estas condiciones agroecologicas. El objetivo fue realizar el estudio del crecimiento y desarrollo del fruto de lulo cultivar var. Septentrionale. Para lo cual se marcaron flores en antesis y se hicieron nueve muestreos de frutos del tercio medio de las plantas cada 20 dias. En cada muestreo se determinaron las siguientes variables: masa fresca y seca de los frutos, firmeza, solidos solubles totales, acidez total titulable e intensidad respiratoria. A los 180 dias, despues de la antesis (DDA), los frutos alcanzaron la madurez de cosecha con una coloracion naranja intensa y una masa promedio de 209 g. El comportamiento de la masa fresca y la masa seca del fruto fue sigmoideo simple lo cual se ajusta a un modelo no lineal de tipo logistico. La acidez total titulable y los solidos solubles totales se incrementaron con el desarrollo del fruto, mientras que la intensidad respiratoria disminuyo y la firmeza aumento hasta los 80 DDA para luego disminuir hasta la cosecha. La tasa absoluta de crecimiento (TAC) se incremento rapidamente y alcanzo su maximo valor</p>

Analysis of growth and physicochemical changes in apple cv. Anna in a high-altitude tropical climate

“…The fresh weight was determined with a precision balance with an approximation of 0.01 g. Dry weight was determined by leaving the fruits in a muffle furnace at 75º C until a constant weight was obtained. The absolute growth rate (AGR) and relative growth rate (RGR) of dry weight were calculated following the methodology of Ochoa-Vargas et al (2016). The polar diameter and equatorial diameter were determined with a 0.01 mm digital caliper.…”

Key Agronomic Fertilization Practices That Influence Yield of Naranjilla (Solanum quitoense Lam.) in the Ecuadorian Amazon

“…The diameter was recorded with a digital caliper (Mitutoyo, model IP-67) five centimeters above the graft attachment point [11]. In addition, the days elapsed from sowing to 50% flowering (days to flowering), fruit setting (days to fruiting) and fruits with different maturity degrees ( Figure 1) [12,13]. The yield was also evaluated by weighing all the fruits (g plant −1 ), the number of fruits per plant and per category were counted (1st category = fruits > 60 mm, 2nd category = 55 to 60 mm, 3rd category = 46 to 54 mm, 4th category ≤ 45 mm) [11,12].…”

“…The practices identified were: A full treatment with all macronutrients (N, P, K, Ca, Mg, and S), a full treatment without nitrogen (−N), a full treatment without phosphorus (−P), a full treatment without potassium (−K), a full treatment without calcium (−Ca), a full treatment without magnesium (−Mg), a full treatment without sulfur (−S), no nutrients applied plus lime (C +lime) and no nutrients applied without lime (C -lime). Naranjilla maturity degrees according to [13]. Note change of color, fruits are harvested at category number 4 for commercial purposes.…”

Phenology and growth of lulo (Solanum quitoense Lam) plants grafted onto Solanum hirtum Vahl.

“…The balance between the energetic demand of plant organs and the photosynthetic contribution of plants must be considered. The efficiency of this partition will affect the composition of the total biomass and, particularly, the distribution of photosynthates to commercially-important organs (Ochoa-Vargas et al, 2016). Crop production seeks to enhance conditions for longer periods of high productivity, with efficient partitioning, achieved with an adequate source-sink relationship (Barrientos et al, 2015).…”