LOCALIZED FERTIGATION WITH STRESSING SOLUTIONS AND GROWTH-QUALITY RESPONSES IN POTTED GREENHOUSE ROSES

The production of cut roses is a highly intensive cropping system that relies on very high water and nutrient applications that are forcing the industry to look into the capture and re-utilization of drainage and the use of alternative, poor-quality irrigation waters.
This preliminary study evaluates the effects of water-quality related stresses (salinity, high pH, high boron, high urea) applied to partial (localized) sections of the root system in roses.
Results to date indicate that greenhouse rose plants, particularly those grafted on ‘Natal Briar’, remain fairly sensitive to rootzone salinity and high pH conditions even when afflicting only a partial section of the root system.
Further information is needed on rose plant performance on other rootstocks, the identification of maximum tolerance thresholds for rootzone chemical-physical stresses, and the most adequate management practices needed to deal with them in commercial production conditions.

II International Symposium on Soilless Culture and Hydroponics

R.I. Cabrera

high pH, boron, urea, salinity, partial stress

https://doi.org/10.17660/ActaHortic.2012.947.5