| Abstrakt: |
A field experiment was concluded in the 2022 spring season.in field of Al-Khader district, 30 km south of Al-Muthanna Governorate, to evaluate the impact of the productivity of sunflower to fractionation (30 kg Ha-1 ) of humic acids at three levels (one batch, two batches, three batches) and spraying with an extract Azolla at four concentrations (0, 20%, 40% and 60%), A randomized complete block design was used for the experiment with three replications and by split-plot method by placing humic acid fractionation levels in a main plots, spraying Azolla concentrations in the secondary plots. The study found that level of fragmentation was superior in two batches in 1000 seeds weight, the individual yield of the plant and the total seed yield with averages of (84.85 gm and 98.31 gm plant-1 and 5.24 tons ha1 ) for the traits in sequence, while the level of fragmentation was superior by three batches in the diameter of the disc and the number of seeds Filled with two averages of (22.75 cm and 961.25 seeds disc-1 ) for the two traits, respectively, spraying Azolla extract at a concentration of 40% was significantly better and generated the greatest mean of disc diameter, number of filled seeds, 1000 seeds weight, individual plant yield and total seed yield, which amounted to 22.60 cm and 1027.86 seed disc-1, 85.81 gm, 102.75 gm plant-1 and 5.47 tons ha-1 ) for the traits respectively. The interaction between the two research variables was significant because the two together (40% Azolla extract with splitting in three batches) achieved the highest two averages The weight of 1,000 seeds and the total number of seeds reached (1089.30 seeds disc1 and 90.27 g) for the two traits, respectively. [ABSTRACT FROM AUTHOR] |
