Document Type : Research Paper
1 Crop Science Department, College of Agriculture, Al-Muthanna University, Iraq.
2 Crop Science Department, College of Agriculture, Al-Muthanna University, Al-Muthanna, Iraq.
The experiment was carried out in the Abu Al-Fadl Forest Nursery, the Plant Production Department, Al-Diwaniyah Agriculture Directorate (3 km north-east of Al-Diwaniyah city) during the winter season 2021-2022, to determine the effect of four levels of phosphate fertilizer (0, 30, 60 and 90 kg P ha-1) and two concentrations of kalotamik acid spray (0 and 200 mg kalotamik L-1), on the growth and yield of oats Avena sativa L. Shifa cultivar. The experiment was applied according to a Randomized Complete Block Design (RCBD) by a split plot, with three replicates. The levels of phosphate fertilizer were distributed in the main plots, while the concentrations of amino acids occupied the sub-plots. The results showed the following: the superiority of plants fertilized at the fertilizer level of 90 kg P ha-1 significantly on the number of tillers, the number of dahlias, the weight of a thousand grains g, the biological yield and grain yield, were given 532 tillers m-2, 468.58 dalia m-2, 46.76 g, 56.39 mcg ha-1, and 8.92 mcg ha-1, respectively, the results also showed that the plants treated with kalotamik acid (concentration 200 mg L-1) were significantly superior to the number of tillers and the number of dahlias, it gave 493.42 tillers m-2 and 414.67 Dalia m-2. The interaction between the two experimental factors (fertilization at a level of 90 kg P ha-1 and spraying with kalotamik acid at a concentration of 200 mg L-1) had a significant effect on the biological yield and grain yield.