Juan Pablo Gómez-Yarce, Edna Rocío Mompotes-Largo, Aníbal López-Castro, J. D. Hernández-Arredondo, Ó. Córdoba-Gaona
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引用次数: 3
摘要
在农林复合系统下种植可可,为可可作物的生理发育提供了有利的环境条件。研究了在农林业系统下,与可可(克隆CCN51)一起种植的遮荫树(西班牙榆树- Cordia alliodora (Ruiz & Pavon) Oken)对可可气体交换参数的影响,该参数与降低可可叶冠层上的光强有关。该实验是在位于安蒂奥基亚市圣罗克市的Investigación el Nus - Agrosavia中心开发的。实验设计采用随机完全区组设计,可可种植距离第一排西班牙榆树与可可种植园之间的距离(4 m, 7 m, 10 m, 13 m)。统计分析采用SAS®9.4统计环境的梯形方程,通过估计每个变量的曲线下面积(AUC)进行统计分析,并进行方差分析,以确定处理之间是否存在统计学差异。使用5%概率的Tukey检验来估计均值之间的统计差异。净光合速率(A)、气孔导度(gs)和蒸腾速率(E)在不同处理间存在显著差异,气体交换参数在距榆树13 m处最高,在距榆树4 m处最低。7 m和10 m植株的所有气体交换参数均为中间值。同样,海拔13 m的植物比海拔4 m的植物具有更高的辐射利用效率(RUE)。树栖成分改变了可可树分布的环境条件,对可可树的生理行为产生差异反应。
Gas exchange efficiency in Cocoa – Spanish elm agroforestry system in the northwest Antioquia, Colombia
The cultivation of cocoa (Theobroma cacao L.) under agroforestry systems, generates beneficial environmental conditions for cocoa crop physiology. An experiment was conducted to evaluate the effect of shade trees (Spanish elm trees - Cordia alliodora (Ruiz & Pavon) Oken) planted along with cocoa (clone CCN51) under an agroforestry system on cocoa’s gas exchange parameters regarding the reduction of the light intensity over the cocoa-leaf canopy. The experiment was developed in the Centro de Investigación el Nus - Agrosavia, located in the municipality of San Roque, Antioquia. The experimental design used was a randomized complete block design for the cocoa planting distances from the first row of Spanish elm trees interfacing with the cocoa plantation (4 m, 7 m, 10 m, 13 m). The statistical analysis was performed by estimating the area under the curve (AUC) of each variable, using the trapezoid equation of the statistical environment SAS® 9.4, an analysis of variances was performed to determine if there were statistical differences between treatments, and Tukey’s test at 5% probability was used to estimated statistical differences between means. There were significant differences in the treatments regarding the net photosynthetic rate (A), stomatal conductance (gs), and transpiration rate (E). The highest values of gas exchange parameters were found in the plants located 13 m from elm trees, while the lowest values were presented at 4 m. Plants at 7 m and 10 m always showed intermediate values for all gas exchange parameters. In the same sense, plants at 13 m had a higher radiation use efficiency (RUE) compared to plants at 4 m. The arboreal component modified the environmental conditions on cocoa trees regarding its distribution, generating a differential response to the physiological behavior of cocoa plants.
期刊介绍:
La Revista Facultad Nacional de Agronomía Medellín (RFNA), de la Universidad Nacional de Colombia, Sede Medellín, Facultad de Ciencias Agrarias, es una publicación científica editada desde el año 1939, en formato impreso y digital y de acceso abierto desde la web —sin costo para autores y lectores—. Está orientada a investigadores que crean conocimiento disciplinar y multidisciplinar que articula la ciencia y la tecnología para hacer más productivo el campo a nivel empresarial y de economía campesina. La Revista tiene como objetivo divulgar resultados de investigación mediante artículos originales, inéditos y arbitrados (peer review) de carácter científico que respondan a preguntas específicas y que proporcionen sustento y pruebas a una hipótesis, en aspectos relacionados con las Ciencias Agronómicas, Producción animal, Ciencias Forestales, Ingeniería Agrícola, de Alimentos y otras afines que contribuyan a la solución de los limitantes del agro a nivel nacional, regional e internacional. La Revista recibe y publica, sin ningún costo, artículos en idioma inglés de investigación, revisión, reseñas y cartas al editor. Desde el 2017 la periodicidad de publicación es cuatrimestral, se publican tres números al año con circulación nacional e internacional, en los siguientes períodos: Enero - Abril Mayo - Agosto Septiembre - Diciembre This journal does not charge APCs or submission charges.