ISHS Acta Horticulturae 449: II International Symposium on Irrigation of Horticultural Crops
WATER REQUIREMENTS AND NITROGEN FERTILIZATION IN JERUSALEM ARTICHOKE (HELIANTHUS TUBEROSUS L.) GROWN UNDER MEDITERRANEAN CONDITIONS |
| Authors: | N. Losavio, N. Lamascese, A.V. Vonella |
| Keywords: | Clones, tuber production, water use, nitrogen levels, sugar yield |
| DOI: | 10.17660/ActaHortic.1997.449.28 |
| Abstract:
The Jerusalem artichoke is a herbaceous plant with the below-ground part (tubers) can be utilized in human and/or animal foodstuffs. Field studies were conducted under typical mediterranean climate in Southern Italy (Metaponto - Matera) during 1992 and 1993. A split-split-plot experiment was used to observe the effects of irrigation (re-establishment of 50 and 100% ETc), nitrogen fertilization (50 and 100 kg N ha) and clones ("Violette de Rennes", "C 146" and "D 19"). Tubers were harvested when the plants had reached the end of growth cycle: fresh and dry matter production per surface unit were determined. The highest tuber dry matter yield was 10.7 t ha-1 (achieved by "VR") applying 256 mm of irrigation water. Tuber yield was not affected significantly by nitrogen fertilization. The medium irrigation and the low nitrogen fertilization rates were superior in terms of sugar yield from tubers. | |
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