Exploring the Sodicity Reclamation Efficiency of Coalchar
Exploring the sodicity reclamation efficiency of Coalchar
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Authors
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A Kanagavalli
Anbil Dharmalingam Agricultural College and Research Institute, Tamil Nadu Agricultural University, Tiruchirappalli, Tamil Nadu, India
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T Sherene Jenita Rajammal
Anbil Dharmalingam Agricultural College and Research Institute, Tamil Nadu Agricultural University, Tiruchirappalli, Tamil Nadu, India
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M Baskar
Anbil Dharmalingam Agricultural College and Research Institute, Tamil Nadu Agricultural University, Tiruchirappalli, Tamil Nadu, India
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C Vanniarajan
Anbil Dharmalingam Agricultural College and Research Institute, Tamil Nadu Agricultural University, Tiruchirappalli, Tamil Nadu, India
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R Parthasarathi
Anbil Dharmalingam Agricultural College and Research Institute, Tamil Nadu Agricultural University, Tiruchirappalli, Tamil Nadu, India
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M Selvamurugan
Horticultural College and Research Institute (Women), Tamil Nadu Agricultural University, Tiruchirappalli, Tamil Nadu, India
Keywords:
Coalchar, Gypsum, Sodic soil, Sodicity reclamation, Exchangeable sodium percentAbstract
This study aimed to assess the impact of Coalchar application alone and in combination with gypsum, organic amendments like vermicompost (VC) and pressmud compost (PMC) on soil chemical properties, particularly pH, electrical conductivity (EC) and exchangeable sodium percentage (ESP) reduction in sodic soil. Here various treatments including: T1- absolute control (no amendment), T2-VC alone @ 2t ha-1, T3- PMC alone @ 3t ha-1, T4-gypsum alone @ 50% gypsum requirement (GR), T5- Coalchar alone @ 3t ha-1, T6- Coalchar +VC (1:1) @ 3t ha-1, T7- Coalchar + PMC (1:1 mixture) @ 3t ha-1, T8- Coalchar + gypsum (1:1mixture) @ 3 t ha-1 amendments were experimented in incubation study. Reclamation efficiency was evaluated based on the reduction in soil exchangeable sodium percent (ESP). Among the different treatments, the Coalchar + Gypsum (1:1) (based on Ca equivalence) combination showed the most significant reduction in ESP from 31.8 to 16.5% and soil pH from 8.92 to 7.92 over 30 days of incubation, and it was on par with the application of coalchar alone @ 3 t ha-1. Coalchar + Gypsum (1:1) treatment differed significantly from other treatments in reclamation parameters, with a reclamation efficiency of 50% ESP reduction over the absolute control (p< 0.05). The results demonstrate that coalchar alone or in combination with gypsum (1:1), can effectively reclaim sodic soils. These results provide that the field scale study be initiative for sodicity reclamation and in the legitimacy to the use of coalchar in sodic soil management as a partially viable and sustainable alternative to gypsum.
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References
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