تأثير الكثافة النباتية و معدلات التسميد الآزوتي في مكونات الإنتاج و الصفات الشكلية و النوعية للقمح القاسي (Triticum turgidum var. durum L.)‎ تحت ظروف محافظة الحسكة (سورية)‎

الملخص EN

The search work was conducted during the growing season 2015, in Taht AL-Shamasia village, (AL- Hassaka / Syria), to study the effect of three plant densities (80,100,120) plant thousand-h, and four nitrogen fertilization rats(0,80,100,120)kg N/h on yield components and morphological and quality traits for the variety Duma1 (Acsad 1105) bad .

The experiment was designed in a Randomized Complete Block Design (R.C.B.D.) with three replicates .

Nitrogen fertilizer was added by using Urea (46% N) at three splits (25% at seed-bed preparation, 50% at tilling Sage, 25% at anthers stage) , while all the amount of phosphate fertilizer was added just before soil preparation.

The results showed that increasing plant density increased the tilling and anthers causing a remarkable dine in the grain yield, and caused dates, significant increase in the plant's might, while increasing plant density did not affect an the spike's length, grain yield and vitreous % of grains.

Increasing the nitrogen fertilizer rates shortened the tilling and flowering stages and increased plant length, spike length, number of grains per spike and the grain vitreous, while grain yield was decreased at 120 kg N.ha-1.

It is recommended to row the variety Douma 1 at a plant density of 120 thousands plant/ha and 100 kg N nitrogen fertilizer rated of, to obtain the higheS grain yield and the beS quantity traits.