Effect of nitrogen fertilization on yield and fruit oil content of avocado trees |
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| Authors: | ABAbou Aziz I Desouki MM El-Tanahy |
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| Institution: | National Research Centre, Dokki, Cairo Egypt |
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| Abstract: | This work was carried out to study the effect of two nitrogen levels, 250 and 500 g of actual nitrogen per avocado tree per year. The nitrogen sources were calcium nitrate (as soil application) and urea (as foliage application).Nitrogen fertilization gave a highly significant increase in tree yield (kg/tree) in most treatments. Moreover, urea sprays seemed to be more effective on the yield than calcium nitrate added to the soil at the same nitrogen level. The 500 g nitrogen level of both sources gave a higher yield increase than 250 g nitrogen. Nitrogen fertilization gave a slight increase in mean avocado fruit weight and size, while urea sprays seemed to be more effective in increasing the mean fruit weight and size. A slight decrease in flesh oil content occurred as a result of nitrogen fertilization. |
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