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Porträttbild på Edith Hammer. Foto.

Edith Hammer

Universitetslektor

Porträttbild på Edith Hammer. Foto.

Optimization of Biofertilizer Formulation for Phosphorus Solubilizing by Pseudomonas fluorescens Ur21 via Response Surface Methodology

Författare

  • Mohsen Barin
  • Farrokh Asadzadeh
  • Masoumeh Hosseini
  • Edith C. Hammer
  • Ramesh Raju Vetukuri
  • Roghayeh Vahedi

Summary, in English

This study aimed to analyze and quantify the effect of different ratios of vermicompost, phosphate rock, and sulfur on P solubilization and release by Pseudomonas fluorescens Ur21, and to identify optimal levels of those variables for an efficient biofertilizer. Twenty experiments were defined by surface response methodology based on a central composite design (CCD), and the effects of various quantities of vermicompost, phosphate rock, and sulfur (encoded by −1, 0, or +1) on P solubilization was explored. The results show that the CCD model had high efficiency for predicting P solubilization (R2 = 0.9035). The strongest effects of the included variables on the observed P solubilization were linear effects of sulfur and organic matter (vermicompost), a quadratic effect of phosphate rock, and an interactive effect of organic matter × phosphate rock. Statistical analysis of the coefficients in the CCD model revealed that vermicompost, vermicompost × phosphate rock, and phosphate rock × phosphate rock treatments increased P solubilization. The optimal predicted composition for maximal P solubilization by P. fluorescens Ur21 (at 1684.39 mg·kg−1, with more than 90% of the added phosphate dissolved) was 58.8% vermicompost, 35.3% phosphate rock, and 5.8% sulfur. ANOVA analysis confirmed the model’s accuracy and validity in terms of F value (10.41), p value (<0.001), and non-significant lack of fit.

Avdelning/ar

  • MEMEG
  • Mikrobiologisk ekologi

Publiceringsår

2022-04

Språk

Engelska

Publikation/Tidskrift/Serie

Processes

Volym

10

Issue

4

Dokumenttyp

Artikel i tidskrift

Förlag

MDPI AG

Ämne

  • Soil Science

Nyckelord

  • biofertilizer
  • central composite design
  • modeling
  • phosphate solubilizing bacteria

Aktiv

Published

Forskningsgrupp

  • Microbial Ecology

ISBN/ISSN/Övrigt

  • ISSN: 2227-9717