TY - JOUR ID - TI - EFFECT OFF SEEDING RATE ON GROWTH AND YIELDS AND ITS COMPONENTS FOR SOME CULTIVARS OF BREAD WHEAT (Triticum aestivum L.) تأثير معدلات البذار في صفات النمو و الحاصل و مكوناته لبعض اصناف حنطة الخبز ( Triticum aestivum L ) AU - Wajeeha A. Hassan Nazar Shahath Khalaf وجيهه عبد حسن نزار شحاذ خلف PY - 2017 VL - 9 IS - 1 SP - 211 EP - 125 JO - Euphrates Journal of Agricultural Science مجلة الفرات للعلوم الزراعية SN - 20723857 AB - The experiment was conducted in an agricultural field in Diyala-Muqdadiya during the planting season 2015-2016 in order to study the effect of seeding rates and the cultivars and the interaction between them for the bread wheat crop in some field traits and the yield and its component under the environmental conditions of Diyala, It had been used the Randomized Complete Block Design (R.C.B.D) according to the order of the factorial experiment with three replicates and the experiment included four cultivars (Adina-99, IPA-99, Sham-9 and Abu-Ghraib-3) and four seeding rates (80,120,160,200) kg.h-1. The following traits were studied:- the plant height (cm), the leaf number, the flag leaf area (cm2), the tillers number. m-2, the spike number. m-2, the spike length (cm), the grain number.spike-1, 1000 grain weight (g), the biological yield (ton.h-1) and the grain yield (ton.h-1). The data showed the superiority of Adina-99 by giving higher grain yield reached (9.92 ton.h-1). This is due to its superiority in the tillers number (749.54 tiller.m-2), the spike number (680.3 spike.m-2), 1000 grain weight (35.45 g) and the biological yield (28.28 ton. h-1). The best seeding rate was (160 kg.h-1), where the plants of this rate outweighed by giving the highest grain yield (9.19 ton. h-1) and the highest 1000 grain weight (32.50 g) and this didn’t significantly different from the seeding rate (120 kg.h-1) which gave the highest plant height (84.92 cm), the highest tillers number (720 tiller. m-2), the highest spike number (658.9 spike. m-2), the highest spike length (11.45 cm) and the highest biological yield (27.71 ton. h-1). It suggested that using Adina-99 cultivar with the seeding rate (120 kg. h-1) for planting in the middle region of Iraq.

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