Scientific Publications

Effects of a commercial calcium protein hydrolysate on the salt tolerance of Diospyros kaki L. cv. “Rojo Brillante” grafton Diospyros lotus L.

February 2015
Scientific articles | StresSal®
F. Visconti, J.M. de Paz, L. Bonet, M. Jordà, A. Quiñones, D.S. Intrigliolo
Instituto Valenciano de Investigaciones Agrarias (IVIA), Centro de Edafología y Biología Aplicada del Segura (CEBAS-CSIC)
Scientia Horticulturae 185 (2015)
Inglés

Diospyros lotus L. is advantageous used as rootstock for Diospyros kaki L. cv. “Rojo Brillante” in most plantations of Eastern Spain. However, one of the few drawbacks of D. lotus L. as rootstock, is the high sensitivity to soil salinity, and specifically chloride. Several complex mixtures of organic polymers such as calcium protein hydrolysates (CPH) have been recommended to counteract salt stress on plants. The effects on soil and plant of the addition of a commercial CPH in the irrigation water of a D.kaki L. cv. “Rojo Brillante” plantation grafted on D. lotus L. were studied during two successive seasons. Soil salinity and chloride contents, significantly, but slightly, increased in CPH treated subplots, while at the same time leaf chloride contents decreased. These effects suggest a lower chloride plant uptake in CPH treated subplots. The lower chloride uptake in CPH treated trees was accompanied by less leaf necrosis, and also lower leaf water potential.

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