Effect of spraying with different concentrations of ascorbic acid on the traits of growth and yield of several genotypes of bread wheat (Triticum Aestivum l. )‎

Abstract EN

This study was conducted to evaluate genotypes of bread wheat Triticum aestivum L.

under the influence of spraying with ascorbic acid.

The field experiment was conducted during the winter season (2019-2020) at the Agricultural Research and Experiments Station of the College of Agriculture at the University of Kirkuk.

the experiment was conducted according to Randomized Completely Block.

Design (RCBD)with Split-Plot arrangement, The main plots included levels of foliar spraying on the plant with ascorbic acid, in three concentrations (0, 10 and 20) g.L-1 .

While (16) genotypes (Hidab, Site Mall, Sulaymaniyah 2, pour Italy, Milan, Sham 6, Adana 99, Jihan, Wafia, Oasis, IPA 99, Abu Ghraib 3, Rashid, Baghdad, Bohuth 22 and Al-Fayyad) were placed in the sub-plot.

Each sector contained (48) experiment units, on which the treatments were distributed to reconcile the studied factors randomly, and some indicators of growth and yield were studied, namely, plant height (cm), the total number of tillers (tillers .m-2 ), spike length (cm), number of grains / spike ,the 1000 weight grain (g) and number of spikes (m2), and grain yield.

(Kg.ha-1 ) and the evidence of harvest%, and the results of the study were summarized as follows: The mean of the squares for spraying with ascorbic acid and the cultivars showed significant differences at the probability level (1%) and for all the studied traits, and the spike length (cm) did not reach the level of significance.

The (rational) genotype excelled in the traits of plant height, the number of total tillers.m-2 , the length of the spike (cm), the weight of 1000 grains (g), the number of spikes (m 2 ) amounted to (95.60) cm2 and (490.66) beaches m -2 And (14.51) cm, (42.24) grains, and (383.78) m-2 , respectively, while the cultivar was excelled in the number of seeds/spike (52.34) grains, and the cultivar Sham 6 in the grain yield kg.ha -1 (5995.96) and the Al-Fayyad cultivar in the harvest index% (45.39)%.