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Soil Phosphorus Dynamics and P Uptake by Medicinal Crops as Influenced by Locally Available Organic Amendments in Light-Textured Soil of Semi-arid Western India

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Abstract

Low phosphorus (P) use efficiency necessitates the high rate of P fertilizer application to achieve the desired crop yield. Locally available organic amendments may be alternative of costly inorganic P fertilizer, but their impact on soil P availability and plant uptake needs further study. Consecutive 2-year field investigation was conducted to examine whether organic amendments had a similar impact on soil P pools and the P uptake by medicinal crops to that of inorganic P fertilizer. The field experiment was conducted with treatments consisting of various organic amendments (farmyard manure, vermicompost, and castor cake) alone or in combination with jivamrut (biodynamic preparation) and recommended dose of inorganic fertilizer. The 2-year cumulative P uptake was significantly higher in the treatment receiving vermicompost (37.5–39.4 kg ha−1) and castor cake (35.2–36 kg ha−1) along with jivamrut as compared to inorganic P fertilizer (25.4–31.9 kg ha−1). The same organic treatments recorded high P recovery as well as negative P balance. There was no significant difference in water-soluble and Olsen P recorded in the treatments receiving inorganic P fertilizer as well as vermicompost + jivamrut and castor cake + jivamrut. However, significantly higher microbial biomass P (MBP) and alkaline phosphatase (ALP) activity was recorded in the treatment receiving organic amendments along with jivamrut. Positive correlation between P uptake, Olsen P, MBP, and ALP activity indicates that organic amendments contributed to plant P uptake by improving soil P availability. Hence, locally available organic amendments were more effective in improving soil P availability than inorganic P fertilizer.

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Acknowledgements

The author thankfully acknowledges the ICAR-Directorate of Medicinal and Aromatic Plants Research, Anand, India, for proving the facilities required to undertake this study.

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B. B. Basak was involved in the conceptualization, designing of the experiment, and writing the original draft and editing.

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Correspondence to B. B. Basak.

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Highlights

• Low use efficiency is a major concern of inorganic phosphatic (P) fertilizer.

• Locally available organic amendments were used as potential alternative.

• Organic amendments showed better plant uptake and recovery than inorganic P fertilizer.

• Integration of organic amendments with jivamrut was found more effective.

• Soil P status and phosphatase activity also improved under combine application of organic amendments and jivamrut.

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Basak, B.B. Soil Phosphorus Dynamics and P Uptake by Medicinal Crops as Influenced by Locally Available Organic Amendments in Light-Textured Soil of Semi-arid Western India. J Soil Sci Plant Nutr 23, 2190–2201 (2023). https://doi.org/10.1007/s42729-023-01172-z

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  • DOI: https://doi.org/10.1007/s42729-023-01172-z

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