Influencia de dos niveles de nutrición y dos niveles de sombra, sobre parámetros fisiológicos y de crecimiento en la etapa vegetativa de cacao (Theobroma cacao L.) clon EETP-801, en Zamora Chinchipe

The importance of cocoa crop has led to the development of research focused on its growth and productivity, however, aspects related to the influence that shade and fertilization exert on the physiological and growth parameters of the crop are still unknown. This disinformation it’s worse in new clones, as is the case of the estacion experimental Tropical Pichilingue 801 (EETP 801). The research aim was to evaluate shade and fertilization influence about physiological and growth parameters in vegetative stage of EETP 801 cocoa clon. The trial was developed in “El Padmi” experimental station, located in Zamora Chinchipe province, under a Completely Random Design with Two-Factor Arrangement. The effect of two shade level and two fertilization level was determined, in a total of four treatments with six repetitions. The variables plant height, trunk cross-sectional area, shoot length, length and metamers number, shoot leaf area, leaf area index, stomatal density and chlorophyll content were evaluated. In addition, the pH and soil electrical conductivity were measured. The results indicate that there is no interaction between the shade and fertilization factors. In variables plant height, soil electrical conductivity, shoot length, chlorophyll A content and stomatal density was observed significant differences between treatments. The fertilization treatment (T3), allows to obtain taller plants and a higher soil electrical conductivity. The shoot length was higher in shade treatment (T2). Respect to chlorophyll A content and stomatal density, the best results were obtained with the shade (T2) and shade – fertilization (T4) treatments. According to the results obtained, it is suggested to use shade intensities of 80 % for the EETP 801 cocoa crop without the addition of fertilizers, or directly make the crop without any shading intensity, but applying the fertilization required in this phase. Keywords: Theobroma cacao L., fertilizaction, incident solar radiation, early growth.

• Yazar: Godoy Betancourt, Paola Daniela (author)
• Materyal Türü: bachelorThesis
• Dil: spa
• Baskı/Yayın Bilgisi: 2021
• Konular: THEOBROMA CACAO; FERTILIZACIÓN; CRECIMIENTO
• Online Erişim: https://dspace.unl.edu.ec/jspui/handle/123456789/23992