ChileanJAR

The experiment was conclucted with grape vines of the variety Sultania, which were grown in pots with quartz sand during two periods under green-house condition, with varying concentrations of calcium and boron.
The different levels of calcium applied as Chloride and Sulphate, Were: 4-6-8-10-12 meq/lt.
Baron was applied to all plants during the first growth period at a concentration of 0.05 ppm and in the second, at a concentration of 0.001 ppm.
At the end of growth period, petioles samples were taken. Besides, during the se· cond period, blade samples were eolleeted to determine Ca, Mg and B.
At the end of the experiment the length of shoots and internodes, and the dry weight of roots and shoots were measured.
Main conclusion were:

- Increasing supplies of calcium in the nutritive solution increased the foliar caneen· tration of ealcium and deereased that of magnesium.
- Greater acumulation of ea1cium in the tissues was observed when this element was applied as Chloride, than when applied as Sulphate.
- Blades seemd to be a better indicators of calcium concentration in the plant than petioles.
- The foliar cancentration of boron showed a tendency to disminish as the levels of calcium Chloride in the solution were inereased.
- High levels of ealcium in the nutritive solution, in the form of ealcium Chloride (10 and 12 meq/lt), redueed the growth when eompared with moderate levels of caIcium (4-6-8 meq/lt), when the eoncentration of boron was low.