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  • Author or Editor: Ioannis N. Therios x
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Nitrate Compensation Points of Several Plum Clones and Relationship to Nitrate Uptake Effectiveness 1

Abstract

The Nitrate Compensation Points (NCP) of 4 plum clones, Marianna 2624 (Prunus cerasifera Ehrh. × P. munsoniana Wight & Hedr.?), M-17 (P. cerasifera × P. munsoniana?), Myrobalan 3-J (P. cerasifera) and Myrobalan B. (P. cerasifera) were determined following NO 3 − depletion from aerated nutrient solutions. Differences among NCP's were statistically significant; however, since the NCP's were low (ca. 5 μm NO 3 − ) relative to the [ NO 3 − ] of typical agricultural soils, the relevance to NO 3 − uptake effectiveness under field conditions remains unresolved. Maximum NO 3 − influx took place above 20 μm NO 3 − , but 15 hour exposures to higher ambient [ NO 3 − ] resulted in higher NCP's. Both decreased influx and increased efflux of NO 3 − may have contributed to higher NCP.

Open Access
Type:
Journal Article
in Journal of the American Society for Horticultural Science
Published print:
01 Nov 1979
Volume/Issue:
Volume 104: Issue 6
Article Category:
Research Article