This study was carried out during both 2018 and 2019 experimental seasons to cover the influence of the
two investigated factors i.e., rootstock grape type (Freedom and Richter) and some bio-stimulants compounds
(compost, Bacillus polymyxa, EM and Azotobacter chrococcum) and their possible combinations. The influence
was evaluated through the response of some vegetative growth and nutritional status of the treated "Crimson"
grape cultivar. The specific effect of rootstock type on vegetative growth, data revealed that, Freedom rootstock
was better than the other investigated rootstock (Richter) in this respect. Also, fertilizer with T4 and T5 g/transplant
were superiors in this respect whereas able to they were increase significantly vegetative growth as compared with
the other different investigated fertilization during both 2018 and 2019 seasons of study. Considering the
interaction effect of the two investigated factors i.e., rootstock type and different bio-stimulants (compost, Bacillus
polymyxa, EM and Azotobacter chrococcum) on vegetative growth of grape transplants, data show the highest
value of vegetative growth were obtained with the combination between Crimson grape transplants grafted on
Freedom rootstock and fertilized with T4, T5 and T7 g/transplants. The obtained results clearly show that, all
treatments increased nutritional status for both rootstocks (Freedom and Richter) of grapevine (Vitis vinifera L.)
in leaves as compared with control treatment.
|
