IRON DEFICIENCY IN KIWI AND ITS CORRECTION BY DIFFERENT METHODS

Several foliar and soil treatments with Fe or Mn were applied in two experimental kiwi orchards with impaired vegetative growth and tree vigor.
Reduced size, chlorosis with marginal burns were the main symptoms in the leaves.
Small, chlorotic fruits bearing large necrotic spots at their distal end were also observed in these orchards.

In the first experiment seven different treatments, including the non treated controls were applied in three replications while in the second one eight treatments were allocated in four complete blocks.
The treatments comprised soil and foliar application of chelates of each of the two elements alone or in combination as well as soil application of FeSO₄ at 100, 200 and 300g per tree and sprays with nitrogen fertiliser enriched with Fe.

As it was found correction of the symptoms was possible with the application of 100g of chelated Fe, alone, by soil.
The effects of his treatment lasted for two years while Mn treatments raised leaf Mn but did not remove symptoms.
Soil application of iron sulphate was not effective.

III International Symposium on Kiwifruit

M.H. Loupassaki, S.M. Lionakis, I.I. Androulakis

Actinidia chinensis, leaf chlorosis, fruits, Greece

https://doi.org/10.17660/ActaHortic.1997.444.41