ASSESSMENT OF SOIL QUALITY PARAMETERS AS INFLUENCED BY CONTINUOUS ADOPTION OF NUTRIENT MANAGEMENT IN AN ALFISOIL

K. MITHILADEVI¹, M. MALARKODI²*, D. SELVI³, D. BALACHANDAR⁴, B. GOKILA^5
1Department of Soil Science and Agricultural Chemistry, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
²Department of Soil Science and Agricultural Chemistry, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
³Department of Soil Science and Agricultural Chemistry, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
⁴Department of Soil Science and Agricultural Chemistry, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
⁵Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
* Corresponding Author : charmsmalar@gmail.com

Received : 01-09-2020     Accepted : 15-09-2020     Published : 30-09-2020
Volume : 12     Issue : 9       Pages : 1902 - 1905
Int J Microbiol Res 12.9 (2020):1902-1905

Keywords : Permanent Manurial Experiment, Inorganic fertilizers, FYM, Enzymes, SOC
Academic Editor : Rajpal Diwakar
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to the Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
Author Contribution : All authors equally contributed

The present investigation was carried out to evaluate the effect of continuous application of fertilizers and manures on soil quality parameters in the ongoing century-old Permanent Manurial Experiment of Tamil Nadu Agricultural University, Coimbatore during 2019. The post-harvest soil after harvest of 168th crop of sunflower was analyzed for physicochemical properties, chemical properties and enzyme activities. Results revealed that the application of inorganic fertilizers alone registered pH > 8.0 whereas the application of fertilizers and manures and application of manures alone registered pH < 8.0 in soil. Among the treatments, continuous application of NPK+FYM @ 12.5 t ha-1 improved the cation exchange capacity, organic carbon content and available nutrient status in the soil whereas unbalanced fertilization and unfertilized control decreased the most, resulted in degraded soil fertility. The enzyme activities were higher with NPK+FYM. The results indicated that the combined application of inorganic and organic fertilizers maintained higher soil quality.

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