ISHS Acta Horticulturae 537: III International Symposium on Irrigation of Horticultural Crops
THE RESPONSE OF ORCHARD CITRUS TREES ON DIFFERENT ROOTSTOCKS TO IRRIGATION WITH SALINE WATER, EVALUATED BY TRICKLE LINEAR GRADIENT |
| Authors: | Y. Levy, J. Lifshitz |
| Keywords: | Grapefruit (Citrus paradisi Macf.) chloride, sodium, nitrate, rootstock, experimental methodology, potassium nitrate. |
| Abstract:
A salinity field experiment was constructed, using the salinity trickle linear gradient (TLG) method in five linear increments of salinity, In 1998 the average of the Cl- gradient was from 234 to 636 mg.L1. Grapefruit (Citrus paradisi Macf.) trees, grafted on eight rootstocks, under two fertilization regimes, were evaluated in a complete factorial field experiment (80 combinations). Preliminary results changed the salinity tolerance ranking of the studied rootstocks, particularly sour orange (C. aurantium L.) and Volkameriana (C. volkameriana Chapot). Significant interactions were found among the effects of rootstock, salinity and nutrition. These include: effects on tree development, leaf and fruit mineral contents, and fruit quality. The results confirm, under orchard conditions, that altering the nutritional regimes can reduce the chloride uptake of susceptible rootstocks, such as Troyer citrange (C. sinensis x Poncirus trifoliata). | |
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