IMPROVEMENT OF GROWTH AND QUALITY OF TIFWAY SOD BY ACTOSOL AND BIOFERTILIZERS

A field experiment was carried out at the golf greens of the 6
October City, Giza, Egypt during 2006 and 2007 seasons to examine
the effect of dressing with actosol (a humic acid NPK liquid fertilizer)
at 20 ml/L. as a foliar spray, nitrobien or biogien (biofertilizers
containing Azotobacter chroococcum and Azospirillum sp..,
respectively) at 50 g/m2 for each as a soil drench, and the combined
treatments between 20ml/L actosol and 50 g/m2 of either nitrobien or
biogien on growth, density, chemical composition and quality of
Cynodon dactylon (L.) Pers × C. transvaalensis Burtt-Davy hybrid
Tifway cultivated in beds (100×100× 30 cm) filled with a mixture of
sand and loam (1:1, v/v).
Experimental results indicated that all fertilization treatments
significantly increased plant height (cm), density (%), number of
plants/m2, as well as herb fresh and dry weights (g) in both seasons
with the superiority of the combination between actosol (20 ml/L.)
and biogien (50 g/m2) followed by the other combination of 20 ml/L
actosol + 50g/m2 nitrobien. A similar trend was also gained
concerning the content of chlorophyll a, b and carotenoids (mg/g
F.W.) in the leaves, as well as the percentages of total carbohydrates
and potassium in the herb. However, the highest percent of nitrogen in
the two seasons was recorded by plants fertilized with nitrobien alone
at the rate of 50 g/m2 , but for phosphorus, this was found due to the
two combined treatments and also to spraying with actosol alone at
the level of 20 ml/L.
IMPROVEMENT OF GROWTH AND QUALITY92
From the previously stated results, it could be concluded that
spraying Tifway bermudagrass turf with actosol at 20 ml/L level after
each cut plus inoculation with either biogien or nitrobien at the rate of
50g/m2 is the best way for obtaining good growth and high quality.