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<p>We established soil quality index (SQI) using different methods and screened the most sensitive soil quality indicators in diversified rice-based cropping systems under different nutrient management practices.&#xa0;To identify the most sensitive soil quality indicator using different indexing approaches viz. simple additive (linear; LA and non-linear; NLA) and weighted additive (linear; LW and non-linear; NLW) in diversified rice-based cropping systems, a field experiment was initiated with rice-mustard-jute, rice-wheat-maize + mung bean and rice-lentil-sesame systems and four nutrient management practices (100% recommended doses of fertilizers (RDF), 75% RDF + 25% N through biogas slurry (BGS), 50% RDF + 50% N through BGS and 100% N through BGS) for seven consecutive years and the SQI was estimated through principal component analysis among 25 soil attributes.&#xa0;Rice-wheat-maize + mung bean exhibited higher productivity, sustainability and soil fertility. SQI obtained through additive method outperformed weightage-based method (3.07 to 3.72 for SQI<sub>LA</sub>, 1.70 to 2.17 for SQI<sub>NLA</sub>, 0.78 to 0.94 for SQI<sub>LW</sub>, and 0.43 to 0.55 for SQI<sub>NLW</sub>). Four soil parameters (available N, hot CaCl<sub>2</sub> extractable B, available S, dehydrogenase activity) were screened as key indicators influencing crop productivity and sustainability. Linear regression between SQI and sustainable yield index indicate superiority of the weightage-based method. Sole chemical fertilizers reduced the SQI (8–14%), while 25% BGS supplementation and legumes inclusion improved soil quality (12.2, 16.1, 12.3 and 15.2% and 6.1, 9.0, 4.8 and 10.6% for SQI<sub>LA</sub>, SQI<sub>NLA</sub>, SQI<sub>LW</sub> and SQI<sub>NLW</sub>, respectively).&#xa0;Legume inclusion with 25% N substitution through BGS are necessary for maintaining crop productivity, sustainability and soil quality in rice-based cropping systems.</p>

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Comparative Assessment of Different Soil Quality Indexing Methods in Diversified Rice-based Cropping Systems Under Inorganic-organic Fertilization in the Indo-Gangetic Plains of West Bengal, India

  • 期刊论文

  • 发表日期：

    2026年3月12日

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  • Samanyita Mohanty,
  • Sushanta Saha,
  • Bholanath Saha,
  • Manabendra Ray,
  • Shubhadip Dasgupta,
  • Soumitra Chatterjee,
  • S.K. Mukhopadhyay,
  • Ratneswar Poddar

摘要

We established soil quality index (SQI) using different methods and screened the most sensitive soil quality indicators in diversified rice-based cropping systems under different nutrient management practices. To identify the most sensitive soil quality indicator using different indexing approaches viz. simple additive (linear; LA and non-linear; NLA) and weighted additive (linear; LW and non-linear; NLW) in diversified rice-based cropping systems, a field experiment was initiated with rice-mustard-jute, rice-wheat-maize + mung bean and rice-lentil-sesame systems and four nutrient management practices (100% recommended doses of fertilizers (RDF), 75% RDF + 25% N through biogas slurry (BGS), 50% RDF + 50% N through BGS and 100% N through BGS) for seven consecutive years and the SQI was estimated through principal component analysis among 25 soil attributes. Rice-wheat-maize + mung bean exhibited higher productivity, sustainability and soil fertility. SQI obtained through additive method outperformed weightage-based method (3.07 to 3.72 for SQILA, 1.70 to 2.17 for SQINLA, 0.78 to 0.94 for SQILW, and 0.43 to 0.55 for SQINLW). Four soil parameters (available N, hot CaCl2 extractable B, available S, dehydrogenase activity) were screened as key indicators influencing crop productivity and sustainability. Linear regression between SQI and sustainable yield index indicate superiority of the weightage-based method. Sole chemical fertilizers reduced the SQI (8–14%), while 25% BGS supplementation and legumes inclusion improved soil quality (12.2, 16.1, 12.3 and 15.2% and 6.1, 9.0, 4.8 and 10.6% for SQILA, SQINLA, SQILW and SQINLW, respectively). Legume inclusion with 25% N substitution through BGS are necessary for maintaining crop productivity, sustainability and soil quality in rice-based cropping systems.