Journal of Environmental Biology

Long term impact of manuring, fertilization and liming on soil resilience, enzyme activities and productivity under maize-wheat system in an acidic Alfisol

K. Patil¹, S. Biswas¹*, P. Mahapatra², T.J. Purakayastha¹, D. Das¹, R. Raj¹, P.P. Maity¹, P. Singh¹ and R. Rahaman¹

¹ICAR-Indian Agricultural Research Institute, New Delhi-110 012, India

²Birsa Agricultural University, Ranchi-834 006, India

Received: 10 May 2024                   Revised: 26 June 2024                   Accepted: 29 August 2024

*Corresponding Author Email : sunandabiswas13@gmail.com                    *ORCiD: https://orcid.org/0000-0002-4816-7577

Abstract

Aim: This study was carried out to evaluate the long-term impact of manuring, fertilization and liming on soil resilience, enzyme activities and system productivity under changing climate scenarios.

Methodology: The soil samples were collected from 67 year old long-term experiment going on, at Birsa Agricultural University, Jharkhand during 2022-23 under maize-wheat cropping system from seven treatments, viz. T₁: control, T₂: 100 % N, T₃: 100 % FYM, T₄: ½ (N+FYM) + P_X/2 + K_Y/2, T₅: 100 % NPK, T₆: Lime + NPK, T₇: Lime + FYM +P_(A-X) + K_(B-Y). To assess soil resistance and resilience, surface samples were subjected to with and without heat stress (48±2°C for 80 hrs) and substrate addition (0.02 g glucose g^-1 soil).

Results: Application of FYM/lime with NPK significantly improved bulk density, pH, SOC and system productivity. The highest enzyme activities and cumulative respiration were observed in lime + FYM + P_(A-X) + K_(B-Y) treatment. It exhibited the highest resistance index (0.92) and resilience index (0.34).

Interpretation: The integrated use of inorganic, organic along with liming proved to be a useful management strategy for maintaining soil quality, resistance and resilience, and crop productivity in acid soil of Jharkhand.

Key words: Enzyme, Heat stress, Maize-wheat system, Soil acidification, Substrate induced respiration, Wheat-maize

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