Vol. 71 No: 3

Title:
The Use of Slow-Release Fertilizers in Citrus

Authors:
MARIA D. RAIGON, E. PRIMO YUFERA, A. MAQUIEIRA and ROSA PUCHADES

pp: 349-360

Abstract:
In the last decades, an important change has taken place in agricultural practices to increase production and thus the economic yield of citrus. This increase has been supported mainly by new irrigable areas and the wider use of fertilizers, especially nitrogenous ones. The efficiency of nitrogenous fertilization is highly variable. A great part of the nitrogen applied to the soil is lost by leaching, causing problems in the environment due to water pollution by nitrates. Slow-release fertilizers can be alternatives to increase efficiency and can reduce the polluting action of the fertilizers, especially in intensive agricultural areas. In this work, all publications found up to date dealing with the utilization of slow-release fertilizers in citrus seedlings and in young and mature trees are reviewed. Attention is paid to the studied responses (growth of the tree, content of nutrients in leaves and soils and the production and quality of the crop), as a function of the type of fertilizer employed in each experiment.

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