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Limiting Chemical Fertilization in Drought Stressed Potatoes (Solanum tuberosum L.) by Using Compost: Influence in Tuber Quality and Storability

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Journal of Soil Science and Plant Nutrition Aims and scope Submit manuscript

Abstract

Potato yield and tuber quality are constrained by water and nutrient deficiencies and often influenced by cold storage. This is commonly resolved with excess usage of chemical fertilizers, which deteriorates soil quality. Profitably interventions to manage water and fertilizers rate are imperative. We aim to investigate the effect of compost combined to decline in NPK fertilizer on potatoes and their pliability to drought stress and cold storage. The two years field experiment (2020–2021; 2021–2022) was conducted in the central of Tunisia with the potato variety Spunta. Treatments included 100% crop reference evapotranspiration (ETc), 75% ETc and 50% ETc, two NPK rates (100% and ½ NPK) and soil compost (0 t and 40 t ha−1). Measures included tubers yield, nitrogen (N), phosphorous (P) and potassium (K) contents, antioxidants and antioxidant capacity. Physico-chemical aspects and tuber composition were evaluated at 0 and 60 days of storage at 4 ºC. Data revealed that 75% ETc (entire/½ NPK) + compost treatment enhanced Ferric Reducing/Antioxidant Power (FRAP) and maintained tuber yield and size, dry matter (DM), starch, membrane stability index (MSI), skin thickness (ST), soluble solids content (SSC) and firmness. Principal component analysis (PCA) showed that i) cold storage decrease the antioxidant capacity, N and K concentrations, ii) cold stored tubers from compost were less influenced by changes in DM, starch and titratable acidity (TA).The 75% ETc + 100% NPK + compost and 75% ETc + 50% NPK + compost treatments combinations may be recommended for potato production and sustainable agriculture under drought stress.

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The data that support the findings of this study are available from the corresponding author upon reasonable request.

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Acknowledgements

This study was supported by the Regional Centre of Agricultural Research of Sidi Bouzid, Tunisia (CRRA-Sidi Bouzid) and the Center of Biotechnology of Borj Cédria. The valuable help and assistance provided by all staff of these organisms, is gratefully acknowledged.

Funding

This work was done in the framework of the project PRF2019-D1P4 entitled “Economie en eau et en intrants chimiques en culture de pomme de terre et son impact sur la production et le développement des maladies” financed by the Tunisian Ministry of Higher Education and Scientific Research.

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Conceptualization: ND, HH and RA. Methodology: HH and RA. Formal analysis: RA. Investigation: HH, RA, GA and ND. Data curation: HH and RA. Writing-original draft preparation: RA. Writing review and editing: RA and HH. Supervision: HH. Project administration: ND and HH. All the authors have read and agreed to the published version of the manuscript.

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Correspondence to Rawaa Akrimi.

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Hajlaoui, H., Akrimi, R., Guesmi, A. et al. Limiting Chemical Fertilization in Drought Stressed Potatoes (Solanum tuberosum L.) by Using Compost: Influence in Tuber Quality and Storability. J Soil Sci Plant Nutr (2024). https://doi.org/10.1007/s42729-024-01728-7

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  • DOI: https://doi.org/10.1007/s42729-024-01728-7

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