Vol. 10, Issue 11 (2021)

Author(s):
K Sai Manjeera, P Venkata Subbaiah, PRK Prasad and M Sree Rekha

Abstract:
A field experiment was carried out to study the influence of different levels of humic acid (10, 20, 30 kg ha^-1) and inorganic N fertilizer viz., 100% of recommended dose and 75% of recommended dose on nutrient content and uptake of direct sown rice at Agricultural college farm, Bapatla during 2019. The experiment was laid out in RBD with ten treatments replicated thrice with BPT-5204 variety of rice as test crop. Plant samples collected at tillering, panicle initiation and harvest stages of crop were analyzed for contents of micro-nutrients (Fe, Mn, Zn, Cu) and their uptakes were calculated using drymatter production at different stages. Results indicated that plant contents of micro-nutrients (Fe, Mn, Zn, Cu) were not significantly influenced by the imposed treatments whereas, significantly highest uptake of micro-nutrients (Fe, Mn, Zn, Cu) at tillering, panicle initiation and harvest (straw and grain) stages were observed with the treatment T₆ that received 100% RDN and HA @ 30 kg ha^-1.