Abstract
To evaluate the influence of irrigation and fertilization on the productivity ofE. globulus a field experiment was started in 1986 in Central Portugal. The nutrients accumulated in the biomass and their allocation to the various biomass components as well as the changes in soil chemical characteristics were also followed. Irrigation and fertilization resulted in a significant increase of biomass production during the first 2 yr. A similar trend occurred with the net primary production and leaf Litterfall. The differences between treatments in the amounts of accumulated nutrients in the aboveground biomass were similar to those of biomass accumulation. However, there was a small but consistent effect related to the average concentration of nutrients in the plant tissues. This effect occurred essentially in the leaves and branches. The concentration of N and P in the leaf Litterfall was higher in the fertilized treatments than in the others. Fertilization alone induced a slight increase in the soil pH values, C content, exchangeable Ca and available P levels. Such increase was more pronounced in the fertilized with dripping irrigation treatment. This was due to the accumulation of nutrients in the wetted soil volume.
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Madeira, M., Pereira, J.S. Productivity, nutrient immobilization and soil chemical properties in anEucalyptus globulus plantation under different irrigation and fertilization regimes. Water Air Soil Pollut 54, 621–634 (1990). https://doi.org/10.1007/BF02385159
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DOI: https://doi.org/10.1007/BF02385159