Vol. 11, Issue 3 (2022)

Author(s):
Leena Banjare, Dr. Rakesh Banwasi, GK Jataw and LK Shrivastav

Abstract:
A study was conducted during kharif 2020 to "Effect of seaweed extract on yield and nutrient uptake of rice in a Vertisol" "at the Indira Gandhi Krishi Vishwavidyalaya's Research cum instructional farm in Raipur (C.G.). Experiment included twelve treatments with a control (no fertilizer, no seaweed), two independent applications of 75% and 100% RDF (@120, 60, 40 N, P2O5, and K2O kg ha-1), and nine various combinations of soil application of seaweed extracts as seaweed granules @ 25 kg/ha, foliar spray of seaweed liquid @ 0.25%, with 75% and 100% RDF. In the experiment, seaweed extract products, such as seaweed liquid (Sagarika liquid) and seaweed granules (Sagarika granules) fortified with seaweed extract derived from red and brown algae, were used. The results showed that combining seaweed extracts with 75% RDF (soil application of seaweed granules @ 25 kg/ha, foliar spray of seaweed liquid @ 0.25%) increased grain yields by 4.6–12.1% over the 75% RDF alone application (52.58 q/ha). Application of seaweed extracts with 100% RDF increased the grain yields 1.84-7.59% in comparison with alone application of 100% RDF (58.46 q/ha). The application of 100% RDF + Seaweed granules @ 25 kg ha-1 at 21 DAT + Seaweed liquid @ 0.25% at 42 DAT resulted in the highest 7.59% increase in grain yield, followed by a 6.4% increase with soil application of seaweed granule (25 kg ha-1) at 21 DAT. Application of seaweed extracts (spray of liquid or soil application of granules) with 75% RDF significantly increased the growth and yield attributes and was recorded at par with 100% RDF, which shows the positive effect of seaweed extracts and a saving of 25% RDF through the application of seaweed extracts.