Mona M. Aly, Lobna M. Abdel-Galeil and Elham M. Aref( 2017). Leverage of biofertilizers on the plantlets of date palm (Phoenix dactylifera) cv
Malacabe in the acclimatization stage
Middle East J. Agric. Res., 6(4): 1510-1518, 2017 ISSN: 2077-4605
Abstract: The acclimatization stage of the palm trees is considered the most important period in the plant life. In this work, some microorganisms had pivotal role in boosting the performance of biological functions of plant. A mixture of bacteria and cyanobacteria with 50 and 75 % of recommended dose of nitrogen improved the morphological properties of plant and enhanced the excretion of biochemical compounds. The mixture of bacteria and cyanobacteria was the best treatment followed by the mixture of bacteria over control in all tested parameters at 75 % of N for 16months for all the tested parameters. Morphological parameters such as plant height significantly increased by 43 % in case of mixture of bacteria and cyanobacteria at 75 % N after 16 months over
control while for leaf width, the increase reached to the double compared to control. Indole content increased by 93 % over control. Chlorophyll (a) and carotenoid contents increased by 1.8 and 1.6 time over control due to the mixture of bacteria and cyanobacteria at 75 % N after 16 months, respectively. The activity of dehydrogenase enhanced and increased 5.7 time compared to control. Unlikely, nitogenase activity recorded the highest rate at 50 % N after 16 months due to the mixture of both
bacteria and cyanobacteria. All biological treatments exerted no significant difference between 50% and 75 % N either after 8 or 16 months for the most morphological and physiological parameters except cyanobacterial treatment.
Keywords: (acclimatization, bacteria, cyanobacteria, biofertilizers, inole acetic acid, chlorophyll, carotenoids, nitrogenase activity, dehydrogenase activity. )
