Home > International Symposium on Growing Media 2007 > IMPACT OF SOLUTION-NH4 CONCENTRATIONS ON SOILLESS-GROWN PLANTS: BENEFITS AND CONSTRAINTS

Articles

IMPACT OF SOLUTION-NH₄ CONCENTRATIONS ON SOILLESS-GROWN PLANTS: BENEFITS AND CONSTRAINTS

Article number

819_45

Pages

373 – 380

Language

English

Abstract

NH₄ concentrations in soil-solutions are commonly low even under irrigation with a high NH₄-N concentration as a result of rapid adsorption on the surface sites of the solid phases and nitrification reactions that diminish the NH₄ content.
In contrast, the NH₄ concentrations in soilless media that have low buffering capacity and are subjected to frequent fertigation events may be high.
Consequently, in soilless culture the impact of varying irrigation NH4 concentration on rhizosphere pH and on plant physiological processes may become crucial and therefore, controlling the irrigation NH₄ concentration is of considerable importance.
The objective of the present study was to study the effect of nitrogen source on two important factors associated with NH₄ nutrition of soilless-grown plants: (i) pH modification and improvement of nutrient availability; and (ii) Interaction between NH₄ concentrations and irrigation frequency.

Publication

International Symposium on Growing Media 2007

Authors

A. Silber

Keywords

fertigation, irrigation frequency, Capsicum annuum, Ozothamnus diosmifolius

Full text

https://doi.org/10.17660/ActaHortic.2009.819.45

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