اعلانات هامة

The research was conducted aiming to study the effect of plant distribution of four plant densities of five varieties of sunflower. The plants treatments were S1, S2, S3 and S4 which represent plant densities of 60, 75, 100 and 150 thousand plants/ ha. Five varieties were used of sunflower are Syrian local (V1), Gallia (V2), Recordo-SM (V3), Sikia – S1 (V4) and Romson – TN (V5). The experiment was a factorial design experiment with3 replicates. To aim definition optimal product and optimal density in the production of the highest values of quantitative and qualitative yield of sunflower

The research was conducted in two stages; first in a field experiment in north – west of Aleppo and the second in the laboratory of Faculty of Agriculture, University of Kafer Al-Shikeh, Egypt.

Results showed the following: Plant densities treatments showed high significant differences in: days to flowering, days to maturity, plant height, leaf area, leaf areas index, diameter of the fruit, 1000 seed weight, total dry matter production, and seed yield. Also, was significant difference at 0.05 in the oil concentration, oil yield and the % of saturated and unsaturated fat acid.

High significant differences at 0.01 for the plant traits; plant height, 1000 seed weight, total dry matter production, seed yield, % of oil content, 0.05 significant differences in days to maturity, leaf area, leaf area index, diameter of the fruit , and the % of saturated fat acid.

The interaction between plant densities and varieties was significant in all the plant traits measured except; diameter of the fruit, total dry matter production and & of oil content in the seed.

Keywords: sunflower, plant densities, varieties.

نفذ البحث بهدف دراسة تأثير أسلوب توزيع النباتات من خلال تطبيق أربعة كثافات نباتية في زراعة خمسة أصناف من محصول عباد الشمس.