Effect of Seaweed Extract under Different Doses of NPK on Productivity of Irrigated Wheat

Abstract

newline A field experiment was conducted during Rabi seasons of 2020-21 and 2021-22 atResearch Farm, SKUAST-J Chatha,The soil of experimental site was sandy loam in texture with slightly alkaline in reaction (pH 7.47), low in organic carbon (4.8 g/kg) and available nitrogen (212.30 kg/ha) but medium in available phosphorus (13.82kg/ha) and potassium (141.16 kg/ha). The experiment was conducted in split-split plot design with three replications. The treatments consisted of three seed treatment with seaweed extractviz.,seed treatment at 3ml/kg seed, seed priming at 3ml/kg seed, and without seed treatment (control) in main plot, sevenfoliar application of seaweed extract, viz., F1:foliar application of seaweed extract at 2ml/L water at tillering stage, F2: foliar application of seaweed extract at 4ml/L water at tillering stage, F3: foliar application of seaweed extract at 2ml/L water at heading stage, F4: foliar application of seaweed extract at 4ml/L water at heading stage, F5: foliar application of seaweed extract at 2ml/L water at tillering stage and heading stage, F6: foliar application of seaweed extract at 4ml/L water at tillering stage and heading stage, F7: control in sub plot, and two level of NPK, viz., 75% NPK and 100% NPK in sub-sub plot. The recommended dose of fertilizer was 100 kg N + 50 kg P + 40 kg K/ ha.Accordingly, half of the total dose of recommended nitrogen, full dose phosphorus and potash were applied at the time of sowing and the remaining half dose of nitrogen was applied at CRIboot stage of crop in two split. The wheat verity HD-3086 was sown with Kera method at 20 cm row spacing using seed rate of 100 kg/ha in the 3rd week of Novemberduring both years. newlineThe result revealed that seed priming and treatment with seaweed extract did not show any significant influence on growth parameters, yield attributes, yield and uptake of NPK than without seed treatment (control) of wheat.However, foliar application of seaweed extract at4ml/L water at tillering and heading stage was resulted in significantly high