Response of barley to nano-feeding with seaweed extract and bio-fertilizer

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During the 2020–2021 growing season, a field experiment was carried out in a farmer's fields in Al-Khader District (30 km south of Al-Muthanna Governorate). To know effect of nano-feeding by seaweed extract with three concentrations (0, 0.5, 1 ml l-1) and bio-fertilizer in three concentrations (0, 2.5, 5 g l-1) in the yield and its components of barley crop. The experiment was applied according to (R.C.B.D) a randomized complete block design with three replications. As the seaweed extract concentrations were placed in main plots and bio-fertilizer was placed in the sub-plots, the following was discovered: The results showed the superiority of spraying with a concentration of 1 ml l-1 of seaweed extract, it gave the highest averages for spikes number of m2, grains number per spike, and total grain yield amounted to 412.60 spikes m2, 45.36 grains spike-1, and 4253 kg ha-1, compared to the no-spray treatment, and no differences were shown. Significance between spraying and non-spraying in 1000 grains weight. Significantly superior was spraying of bio-fertilizer at a concentration of 5 g l-1 in spikes number of m2, grains number per spike, and grain yield; it increased by an increased rate of (14.45%, 22.63% and 20.00%) over the control treatment for traits in succession, while the non-spraying treatment was significantly superior on the rest of treatments in description of weight 1000 grains, it gave the highest mean of 34.62 g. As for the interaction, the results showed a significant difference in characteristics; grains number per spike, 1000 grains weight, and total grain yield. The combination (1 ml l-1 of seaweed extract x 5 g l-1 of bio-fertilizer) gave a highest grain yield at 4589 kg ha-1 compared compared to the remaining combinations.