Vol. 10, Issue 10 (2021)

Author(s):
S Valarmathi, T Thilagavathi, S Paul Sebastian, J Ejilane and D Janaki

Abstract:
A pot experiment was conducted in Regional Laboratory at Anbil Dharmalingam Agricultural College and Research Institute, Tiruchirapalli to study the effect of organic manures and pyroligneous acid on soil enzymes activity under okra cultivation in sodic soil. The result of the study was the improvement in soil enzymes in all plots over the initial value up to 60 DAS which declined thereafter. On 60 DAS, highest urease (11.63 μg NH₄⁺ released g^-1 hr^-1), dehydrogenase (40.03 μg of TPF g^-1) and alkaline phosphatase (42.00 μg of PNPP g^-1) activity was found in the treatment T₁₀ (STCR + PA @ 1:300 dilution + 2% vermicompost). Increase in the soil enzyme activity is a good indicator of soil condition for crop growth. The Study revealed that use of organic manures along with PA increased soil enzymes viz., urease, dehydrogenase and alkaline phosphatase activity when compare to sole application PA (T₂), FYM (T₅) and vermicompost (T₇).