ANÁLISIS DEL POTENCIAL DE LA FERTIRRIGACIÓN CARBÓNICA EN CÍTRICOS

Abstract

[EN] This research work constitutes a first approximation to the study of the viability of carbonic fertirrigation in citrus fruits as a CO2 drain potential. To that effect, carbonic fertirrigation experiments were carried out with citrus fruits of the Nadarcott variety from the year 2010 to the year 2015. The study required the monitoring of parameters related to the leaf surface, the phenological state of the trees, the ground, the leaves and the fruits of the tested trees. The analysis of the results obtained showed there were no significant differences in the size and quality of the fruits irrigated with CO2. Differences were neither observed in the trees' vegetative development nor in the advance or delay of the blooming and formation of fruits. The analysis of the grounds revealed that the content in organic matter of the grounds irrigated with CO2 was higher than in the grounds used as reference in at least two tenths of a percentage. Similarly, it was noted that the content in iron in the leaves of the trees irrigated with CO2 was significantly higher than in the trees used as reference. The statistical analysis carried out confirmed these conclusions, noting a 24% increase over the average value in the case of the organic matter in the ground and of a 16% in the case of the iron content in the leaves. Both factors indicate that carbonic fertirrigation does have relevant agronomic repercussions, especially on the organic fraction of the ground and on the iron soluble fraction. Various authors confirm the mobilisation of the iron produced by the decrease in the pH of the irrigation water - this study confirms this fact and strengthens the usage of carbon dioxide as a potential substitute of strong acids normally used for this purpose. The increase in the content of the ground's organic matter is an especially interesting result, as it was not expected, even though some authors have related the decrease of soil respiration to different cultural practices that improve the ground's texture. The interaction between the CO2 of the irrigation water and the content in organic matter in the ground and, therefore, soil respiration must be studied in further detail in a future, with experiences specially aimed at valuing the repercussions of this practice on both parameters.; [ES] Este trabajo de investigacion constituye una primera aproximacion al estudio de viabilidad de la fertirrigacion carbonica en citricos como potencial sumidero de CO2. A tal efecto, se llevaron a cabos experimentos de fertirrigacion carbonica con citricos de la variedad Nadarcott desde el ano 2010 hasta el ano 2015. El estudio requirio la monitorizacion de parametros relacionados con la superficie foliar, los estados fenologicos de los arboles, el suelo, las hojas y los frutos de los arboles ensayados. El analisis de los resultados obtenidos mostro que no habia diferencias significativas en el tamano y calidad de los frutos regados con CO2. Tampoco se observaron diferencias en el desarrollo vegetativo de los arboles ni en el avance o retraso…