اعلانات هامة

The experiment was carried out in the General Commission for Scientific Agricultural Research (GCSAR) at Der Ez Zour Agricultural Research Center, during 2008/2009- 2009/2010 seasons, at summer time, to evaluate the growth response of 10 sugar beet genotypes irrigated with saline water, the electrical conductivity (ECw) of the water ranged from 8.6-10 dS.m-1 in the first year to 8.4-10.4 dS.m-1 in the second year. Randomized completely block design (RCBD) with three replicates was used.

The results revealed significant variation in the response of the genotypes when irrigated with saline water. So, i.e.,  Kawemira, Monte baldo, Waed, Brigitta, and Dita exhibited  lower reduction tested indices, compared Tigris and Rifle genotypes exhibited the highest reduction.

Some indices as, Leaf area (LA), Leaf number (LN), crop growth rate (CGR), relative growth rate (RGR), net assimilation rate (NAR) and leaf area ratio (LAR) decreased, but specific leaf weight (SLW) increased under saline conditions compared to control. Depending on this the results confirm the importance of using some tested indices (LA, CGR, RGR, NAR) as screening criteria for sugar beet genotypes under saline stress conditions.

This study concluded the possibility of growing Kawemira, Waed, Montebaldo, Brigitta successfully if saline water is the major source of irrigation, as in the eastern area of Syria, in summer time (if this planting date going to be recommended in the future).

Key words: Salinity stress, Growth analysis, Sugar beet.

نفذت هذا البحث في أراضي مركز بحوث دير الزور التابع للهيئة العامة للبحوث العلمية الزراعية، خلال العروة الصيفية في الموسمين 2009/2008 و 2010/2009، بهدف تقييم استجابة النمو لعشرة طرز وراثية من الشوندر السكري، رويت بمياه مالحة، ذات ناقلية كهربائية (ECw) تراوحت بين (8.6-10 dSm-1) في الموسم الأول و(8.4-10.4 dSm-1) في الموسم الثاني. نفذت التجربة وفق تصميم القطاعات الكاملة العشوائية (RCBD) وبثلاثة مكررات.