Valorization of phosphate sludge and its bacterial biomass as a potential bioformulation for improving tomato growth

Ait-Ouakrim, El Houcine; Ziane, Salma Oulad; Chakhchar, Abdelghani; Ettaki, Ismail; El Modafar, Cherkaoui; Douira, Allal; Amir, Soumia; Ibnsouda-Koraichi, Saad; Belkadi, Bouchra; Filali-Maltouf, Abdelkarim

doi:10.1007/s11356-023-31103-5

Cited by 2 publications

(3 citation statements)

References 28 publications

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“…Phosphate sludge is a byproduct of phosphate extraction and rock phosphate treatment. Considering its high residual phosphate complex content, it could be an important source of PSB biomass and Phosphorus in soils lacking in P, which is crucial for plant growth [26,27,39]. This study aimed to assess the inoculation effect of BSPs isolated from phosphate sludge and AMF in substrates based on sludge, with an increasing rate of sludge up to 60% mixed with peat; with increasing phosphate solid sludge rates, all of the parameters tested, including morphological traits, biomass, Chlorophyll a and b, and nutrient contents (N, P, K, and calcium), declined.…”

Section: Discussionmentioning

confidence: 99%

“…Morocco, as the world's leading exporter and the third-largest producer of natural phosphates, commands an impressive share exceeding 70% of the global phosphate deposits. The annual extraction of over 23 million tons of minerals leads to a substantial generation of phosphate sludge, constituting 90% of the treatment plant's discharges [25,26]. The volume of this waste becomes increasingly significant with rising phosphate production, resulting in P loss during treatment.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the disposal of substantial amounts of phosphate sludge into the environment carries severe environmental consequences. Recent efforts have focused on recovering the lost P fraction from phosphate sludge through various approaches, such as thermo-chemical, thermo-reductive, composting, by introducing it as a source of phosphorus in phosphorous-poor soils, and wet chemical leaching [26][27][28][29]. Despite their efficacy, these methods entail considerable energy consumption, posing significant environmental challenges.…”

Section: Introductionmentioning

confidence: 99%

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Elevating Sorghum Prosperity: Unveiling Growth Trends through Phosphate-Solubilizing Bacteria and Arbuscular Mycorrhizal Fungi Inoculation in Phosphate-Enriched Substrates

Aliyat,

El Guilli,

Nassiri

et al. 2024

Agronomy

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This study aimed to elucidate the impact of phosphate-solubilizing bacteria (PSB) and arbuscular mycorrhizal fungi (AMF) inoculation on sorghum growth within substrates derived from phosphate solid sludge, with the overarching objective of repurposing phosphate sludge to be a viable agricultural substrate. Four PSB strains (Serratia rubidaea, Enterobacter bugandensis, Pantoea agglomerans, Pseudomonas sp) were meticulously selected from phosphate solid sludge, along with two AMF strains (Rhizophagus intraradices and Funneliformis mosseae), constituting the experimental inocula. Phosphate solid sludge was judiciously blended with peat at varying volumetric proportions (0%, 10%, 20%, 40%, and 60%), providing the matrix for sorghum cultivation, and concomitantly subjected to inoculation with PSB and AMF. Following a meticulously monitored two-month duration, a comprehensive evaluation of diverse morphological parameters, biomass accrual, nitrogen content, total phosphorus concentration, potassium levels, calcium content, and root colonization in sorghum plants was conducted. The empirical findings underscored a discernible decline in the assessed parameters with escalating concentrations of phosphate solid sludge. Particularly noteworthy was the pronounced amelioration observed in plants inoculated with AMF in comparison to both the control and PSB-inoculated counterparts. In conclusion, the application of raw phosphate solid sludge as an agricultural substrate is deemed unsuitable, prompting the imperative need for further in-depth investigations to ascertain the nuanced intricacies underlying these outcomes.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Elevating Sorghum Prosperity: Unveiling Growth Trends through Phosphate-Solubilizing Bacteria and Arbuscular Mycorrhizal Fungi Inoculation in Phosphate-Enriched Substrates

Aliyat,

El Guilli,

Nassiri

et al. 2024

Agronomy

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Ecological and sustainable implications of phosphorous-solubilizing microorganisms in soil

Iftikhar,

Farooq,

Akhtar

et al. 2024

Discov Appl Sci

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Phosphorus (P) is a macronutrient that plants need to grow. However, most of the soil’s phosphorus is still insoluble, making it difficult for plants to absorb. This creates a barrier to ecologically responsible farming methods and calls for innovative approaches to phosphorus solubilization. Solublizing microorganisms improve the availability of phosphorous in soil. The term “phosphorus-solubilizing microorganisms” (PSMs) describes various fungi or bacteria that divide the phosphorus into more soluble forms. It shows how PSMs interact with plants and their processes to solubilize phosphorus. Soil pH, temperature, and nutrient availability are only a few parameters affecting its activity. PSMs are investigated for their potential to increase plant phosphorus absorption and use, thereby boosting agricultural yield and nutrient usage efficiency. The use of PSMs and their effects on the environment are also evaluated. By using PSMs, farmers may use less chemical phosphorus fertilizers that contribute to runoff and eutrophication in waterways. Furthermore, PSMs may improve soil structure, decrease nutrient losses, and increase nutrient cycling, all of which contribute to soil health and the long-term viability of agricultural systems. Phosphorus-solubilizing microorganisms have enormous promise in environmentally responsible farming and land management. Better phosphorus availability, greater agricultural output, less pollution, and better soil health are all possible outcomes of using PSMs. However, further study is required to determine the best application strategies, formulations, and choices of PSMs for various soil and plant systems. Incorporating PSMs into agricultural operations can potentially improve environmental sustainability and resilience. This article will explore the potential of PSMs in addressing critical environmental challenges, including soil erosion, nutrient runoff, sustainable farming practices, and resource conservation. Graphical Abstract

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Valorization of phosphate sludge and its bacterial biomass as a potential bioformulation for improving tomato growth

Cited by 2 publications

References 28 publications

Elevating Sorghum Prosperity: Unveiling Growth Trends through Phosphate-Solubilizing Bacteria and Arbuscular Mycorrhizal Fungi Inoculation in Phosphate-Enriched Substrates

Elevating Sorghum Prosperity: Unveiling Growth Trends through Phosphate-Solubilizing Bacteria and Arbuscular Mycorrhizal Fungi Inoculation in Phosphate-Enriched Substrates

Ecological and sustainable implications of phosphorous-solubilizing microorganisms in soil

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