Ola Tawfeek Al-Halabi*(1) Bayan Mohammed Muzher(1) Samer Ghaleb Abou Hamdan(1) and Saoud Sarboukh(2)
(1). Pome and Grapevine Division, Agriculture Scientific Research Center in Sweida, General Commission for Scientific Agricultural Research GCSAR, Damascus, Syria.
(2). Hoot Research Station, Agriculture Scientific Research Center in Sweida, GCSAR, Damascus, Syria.
(*Corresponding author: Dr. Ola Tawfeek Al-Halabi. E-Mail: ola_halabi@msn.com).
Received: 12/01/2019 Accepted: 10/04/2019
Abstract
This investigation was achieved during 2013-2015 at Pome and Grapevine Division and Hoot Station in Al Swieda to study the response of apple rootstock Sukary Alswieda seedling produced by stoolbed to deficit irrigation by applying three levels of water: 100% (control), 75% and 50% of water requirement. Growth dynamic, aerial vegetative and root system characters, root deepness in soil and the wet and dry weight of plant parts were studied for this rootstock under studied water levels. The results showed that Sukary Alswieda rootstock had different growth behaviors depending on the level of water, in addition to shorten plant length at the levels of 50% and 75 % (95.5 cm and 118 cm respectively), on the other hand, the length and deepness of its root in comparison with the control treatment. The levels 50% and 75% distinguished with high number of fine roots (1mm diameter) which were 90 and 87 roots respectively, while it was 73 regarding the control. As well as, the accumulation of dry mater increased in roots at the levels 50% and 75%, and decreased in stem and leaves, these results indicated the response of the studied rootstock to the deficit irrigation conditions, and although of shorten plant length at 75% level, but the seedlings length was in the acceptable range for producing seedlings, consequently, the ability of applying deficit irrigation and benefiting from the efficient use of available irrigation water when producing the grafted seedlings from this rootstock, however, it had a good root system.
Key words: Apple rootstock, Stool bed, Deficit irrigation.