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Background and aims <p>Understanding the response of soil phosphorus (P) under long-term precision nutrient management in varying tillage-residue systems will provide insight into sustainable P management in a conservation agriculture (CA) system.</p> Methods <p>A study was carried out under long-term (10&#xa0;years) tillage-residue and precise nutrient management system in a split-plot design with four tillage-residue regimes as main-plots [i) conventional tillage (CT), ii) conventional tillage with mungbean residue retention (CT + MB), iii) permanent bed (PB) and iv) permanent bed with mungbean residue retention (PB + MB)] and three nutrient management options [farmer’s fertilizer practice (FFP), recommended dose of fertilizer (RDF) and ‘Nutrient Expert’-based site-specific nutrient management (SSNM)] as sub-plots replicated thrice.</p> Results <p>Data showed that PB + MB boosted crop yield and P uptake, improved labile P and moderately labile P over CT and CT + MB. This can also be corroborated by higher Olsen P and microbial properties (microbial biomass P and phosphatase enzyme activities). Although the tillage-residue had no evident effect on the stable fractions, the total P was significantly enhanced. Among the nutrient management, SSNM significantly improves the labile P and NaOH–Po. Excess P application beyond crop requirements (RDF and FFP) led to HCl–P, residual–P and total P accumulation. Pearson’s correlation showed that crop yields were closely associated with the Olsen P and labile fractions.</p> Conclusion <p>Interaction effect indicated that implementing precise nutrients through SSNM in a CA system (PB + MB) could be the way forward in improving P availability in the CA system.</p>

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Soil phosphorus response to long-term tillage, crop residue and precision nutrient management under maize-wheat cropping system in a Typic Haplustept

  • 期刊论文

  • 发表日期：

    2025年7月3日

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  • Immanuel Chongboi Haokip,
  • Brahma S. Dwivedi,
  • Mahesh C. Meena,
  • Siba P. Datta,
  • Abir Dey,
  • K. K. Bandopadhyay,
  • H. S. Jat,
  • Priti Tigga,
  • Sunil BH

摘要

Background and aims

Understanding the response of soil phosphorus (P) under long-term precision nutrient management in varying tillage-residue systems will provide insight into sustainable P management in a conservation agriculture (CA) system.

Methods

A study was carried out under long-term (10 years) tillage-residue and precise nutrient management system in a split-plot design with four tillage-residue regimes as main-plots [i) conventional tillage (CT), ii) conventional tillage with mungbean residue retention (CT + MB), iii) permanent bed (PB) and iv) permanent bed with mungbean residue retention (PB + MB)] and three nutrient management options [farmer’s fertilizer practice (FFP), recommended dose of fertilizer (RDF) and ‘Nutrient Expert’-based site-specific nutrient management (SSNM)] as sub-plots replicated thrice.

Results

Data showed that PB + MB boosted crop yield and P uptake, improved labile P and moderately labile P over CT and CT + MB. This can also be corroborated by higher Olsen P and microbial properties (microbial biomass P and phosphatase enzyme activities). Although the tillage-residue had no evident effect on the stable fractions, the total P was significantly enhanced. Among the nutrient management, SSNM significantly improves the labile P and NaOH–Po. Excess P application beyond crop requirements (RDF and FFP) led to HCl–P, residual–P and total P accumulation. Pearson’s correlation showed that crop yields were closely associated with the Olsen P and labile fractions.

Conclusion

Interaction effect indicated that implementing precise nutrients through SSNM in a CA system (PB + MB) could be the way forward in improving P availability in the CA system.