|TOMATO OXYGEN SUPPLEMENTATION SUMMARY|
|FGI (cm)z||SDW (g)||RDW (g)|
|13.3 (oxygenated)||45.6||39.7||11.4 ay|
|7.2 (control)||51.3||38.7||9.4 b|
zFGI: final growth indices (average of three tallest growth points + width1 + width2) ÷ 3.
yMeans (within a column) with the same letters are not significantly different according to
Tukey's least significant difference test, alpha = 0.05.
Kläring, H.-P. and M. Zude. 2009. Sensing of tomato plant response to hypoxia in the root environment. Scientia Hort.
Drew, M.C. and J.M. Lynch. 1980. Soil anaerobiosis, microorganisms, and root function. Ann. Rev. Phytopathol. 18:37-66.
Marfà, O., R. Cáceres, and S. Guri. 2005. Oxyfertigation: A new technique for soilless culture under Mediterranean
conditions. Proc. IS on Soilless Cult. And Hydroponics. Acta Hort. 697.
There were no differences in growth indices or shoot biomass of lavender irrigated with elevated dissolved oxygen compared to lavender irrigated with the control level (Table 1). However, root biomass was 21% greater for lavender irrigated with elevated dissolved oxygen compared to plants irrigated with the control level. These results are similar to Marfà et al. (2005) who reported an increase in fine roots (less than 2 mm) of peppers grown in Rockwool irrigated with 16 ppm dissolved oxygen compared to their control level of 6 ppm. Based on our results, elevating the dissolved oxygen level of irrigation water can improve root growth of container grown lavender.
We acknowledge Andrea Menendez, Marisol Benitez-Ramirez, and Phil Flanagan for technical assistance and Kim Holden's Nursery for supplying the water source.