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Purpose <p>Soil salinity, a major concern in many regions globally, including Pakistan, increasingly threatens agricultural productivity. A promising solution is the application of biochar, a material with high carbon content produced through the pyrolysis of organic residues, such as agricultural and forest waste.</p> Methods <p>Four types of biochar, including rice straw biochar (RSB), modified rice straw biochar (MRSB), wheat straw biochar (WSB), and modified wheat straw biochar (MWSB), at the rate of 0%, 1%, 1.5%, and 2%, were applied according to a randomized complete block design. The rice crop, variety Super Basmati 2019 (salt-tolerant variety), was grown to study growth parameters, including maximum plant height, number of tillers, total biomass, straw and paddy yield, and 1000 grain weigh. The different chemical properties of soil, including pH, electrical conductivity (EC), sodium adsorption ratio (SAR), organic matter, phosphorus (P) and potassium (K) were assessed.</p> Results <p>The statistical analysis showed that biochar application significantly improved soil chemical properties by reducing soil pH, electrical conductivity, and sodium adsorption ratio, while increasing organic matter, available phosphorus, and potassium contents. Among all the studied biochar types, modified rice straw biochar (MRSB) demonstrated superior performance at all applied levels. MRSB-treated soil resulted in the highest improvements in plant height, number of tillers, total biomass, 1000-grain weight, paddy yield, and chlorophyll content compared to other biochar types. The enhanced nutrient retention and improved soil structure under MRSB application established its higher reclamation potential for saline-sodic soils.</p> Conclusions <p>These findings offer valuable insights into the potential use of biochar as a sustainable soil amendment to rehabilitate salt-affected soils and improve agricultural productivity.</p>

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Evaluating Soil Reclamation and Growth Enhancing Potential of Various Types of Biochar with Respect To Rice Crop Cultivated in Saline Sodic Soil

  • 期刊论文

  • 发表日期：

    2025年9月24日

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  • Imran Shehzad,
  • Ghulam Sarwar,
  • Abid Mahmood,
  • Kashf Mehmood,
  • Zuhair Hasnain,
  • Muhammad Zeeshan Manzoor,
  • Danish Ibrar,
  • Saqib Bashir,
  • Manzer H. Siddiqui,
  • Saud Alamri,
  • Shahbaz Khan

摘要

Purpose

Soil salinity, a major concern in many regions globally, including Pakistan, increasingly threatens agricultural productivity. A promising solution is the application of biochar, a material with high carbon content produced through the pyrolysis of organic residues, such as agricultural and forest waste.

Methods

Four types of biochar, including rice straw biochar (RSB), modified rice straw biochar (MRSB), wheat straw biochar (WSB), and modified wheat straw biochar (MWSB), at the rate of 0%, 1%, 1.5%, and 2%, were applied according to a randomized complete block design. The rice crop, variety Super Basmati 2019 (salt-tolerant variety), was grown to study growth parameters, including maximum plant height, number of tillers, total biomass, straw and paddy yield, and 1000 grain weigh. The different chemical properties of soil, including pH, electrical conductivity (EC), sodium adsorption ratio (SAR), organic matter, phosphorus (P) and potassium (K) were assessed.

Results

The statistical analysis showed that biochar application significantly improved soil chemical properties by reducing soil pH, electrical conductivity, and sodium adsorption ratio, while increasing organic matter, available phosphorus, and potassium contents. Among all the studied biochar types, modified rice straw biochar (MRSB) demonstrated superior performance at all applied levels. MRSB-treated soil resulted in the highest improvements in plant height, number of tillers, total biomass, 1000-grain weight, paddy yield, and chlorophyll content compared to other biochar types. The enhanced nutrient retention and improved soil structure under MRSB application established its higher reclamation potential for saline-sodic soils.

Conclusions

These findings offer valuable insights into the potential use of biochar as a sustainable soil amendment to rehabilitate salt-affected soils and improve agricultural productivity.