Effects of<scp>long‐term</scp>sewage sludge application to a calcareous soil structure

Simões‐Mota, Ana; Virto, Iñigo; Poch, Rosa M.

doi:10.1111/sum.12838

Cited by 5 publications

(3 citation statements)

References 72 publications

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“…In terms of microstructure, the increased pedality of SNC compared to SPC (Figure 3) could be interpreted as a saturation effect resulting from the highest sludge rate, which prevented the structure from developing further. Some authors support the idea that the potential benefits of SS for soil structure are limited to their use within a certain dose range [64]. No significant differences between treatments in terms of the percentage of total porosity (>30 µm) were found.…”

Section: Discussionmentioning

confidence: 88%

Sustainability Assessment after Twenty Years of Sewage Sludge Application on Calcareous Soil Following N or P Criterion

Camps-Sagué,

Lavaquiol,

Bosch-Serra

et al. 2024

Sustainability

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Sewage sludge is a valuable source of nutrients when applied to the soil. Research on its agricultural use has been focused on chemical parameters to prevent heavy metal buildup. However, soil quality includes a wider spectrum of indicators. Our aim was to evaluate the impacts of sludge application on the biological and physical soil properties of calcareous soil when sludge is applied in maize monoculture using fertilization dosage criteria determined by N input or soil P thresholds. A control based on mineral fertilization was also included. After 20 years, no differences were found in the biological indicators: earthworm and soil oribatid mite abundances. Five oribatid species were identified, but three predominated: Acrotritia ardua americana, Oribatula (Zygoribatula) excavata and Tectocepheus sarekensis. The latter two showed a maximum number of individuals five months after maize stalks were buried in soil, independent of fertilization treatment. Sludge significantly increased water-stable aggregates (up to 30%), but there was no difference in macroporosity (apparent pore diameter > 30 μm). Under irrigated calcareous soil, sewage sludge applied as fertilizer is a sustainable option, independent of the threshold criterion (N or P) used. Nevertheless, as the P threshold criterion allows for reduced P inputs, it is more sustainable over the long term.

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Section: Discussionmentioning

confidence: 88%

Sustainability Assessment after Twenty Years of Sewage Sludge Application on Calcareous Soil Following N or P Criterion

Camps-Sagué,

Lavaquiol,

Bosch-Serra

et al. 2024

Sustainability

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“…The use of sewage sludge fertilizers can have significant agronomic benefits, such as providing nutrients such as nitrogen, ammonium, potassium, and zinc and thus improving soil quality ( Marin and Rusănescu, 2023 ). When sewage sludge is applied to the soil, it can indeed improve soil organic matter (SOM) content, nutrient contents, soil porosity, bulk density, aggregate stability, and available water holding capacity ( Simões-Mota et al., 2022 ). This improvement could be attributed to several factors, such as the high moisture content of sewage sludge and the presence of soil organic matter ( Achkir et al., 2023 ).…”

Section: The Climate-nutrient Nexus: Managing Nutrient Inputs For Sus...mentioning

confidence: 99%

Nutrient management: as a panacea to improve the caryopsis quality and yield potential of durum wheat (Triticum turgidum L.) under the changing climatic conditions

Melash,

Bogale,

Bytyqi

et al. 2023

Front. Plant Sci.

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The increasing human population and the changing climate, which have given rise to frequent drought spells, pose a serious threat to global food security, while identification of high-yielding drought-tolerant genotypes coupled with nutrient management remains a proficient approach to cope with these challenges. An increase in seasonal temperature, recurring drought stress, and elevated atmospheric CO2 are alarmingly affecting durum wheat production, productivity, grain quality, and the human systems it supports. An increase in atmospheric carbon dioxide can improve wheat grain yield in a certain amount, but the right amount of nutrients, water, and other required conditions should be met to realize this benefit. Nutrients including nitrogen, silicon, and sulfur supply could alleviate the adverse effects of abiotic stress by enhancing antioxidant defense and improving nitrogen assimilation, although the effects on plant tolerance to drought stress varied with nitrogen ionic forms. The application of sewage sludge to durum wheat also positively impacts its drought stress tolerance by triggering high accumulation of osmoregulators, improving water retention capacity in the soil, and promoting root growth. These beneficial effect of nutrients contribute to durum wheat ability to withstand and recover from abiotic stress conditions, ultimately enhance its productivity and resilience. While these nutrients can provide benefits when applied in appropriate amounts, their excessive use can lead to adverse environmental consequences. Advanced technologies such as precision nutrient management, unmanned aerial vehicle-based spraying, and anaerobic digestion play significant roles in reducing the negative effects associated with nutrients like sewage sludge, zinc, nanoparticles and silicon fertilizers. Hence, nutrient management practices offer significant potential to enhance the caryopsis quality and yield potential of durum wheat. Through implementing tailored nutrient management strategies, farmers, breeders, and agronomists can contribute to sustainable durum wheat production, ensuring food security and maintaining the economic viability of the crop under the changing climatic conditions.

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“…compost, biochar) to soil could enrich soil with the plant essential macronutrients N and P mostly, reducing at the same time the burden of industrial N and P fertilizers production which is costly (Ye et al, 2022). Moreover, contrary to inorganic fertilizers, fertilization with sludge could improve soil structure, due to its organic matter content (Simoes-Mota et al, 2022). In the perspective of enhancing sewage sludge fertilizing capacity, treatment of sludge by mixing it with certain clay minerals or biochar was studied in our previous research (Balidakis et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Sewage sludge treated with bentonite, vermiculite or biochar can improve soil properties and enhance growth of grasses

Balidakis

Karagianni

Ipsilantis

2023

Soil Use and Management

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Sewage sludge treated with 15% bentonite, vermiculite or biochar was evaluated as a soil amendment in comparison to limed and untreated sludge. Seven treatments were established to two soils, an acid and an alkaline, in three replications, i.e. 2% addition of sludge treated with bentonite, vermiculite, biochar and lime and application of 2% untreated sludge, inorganic fertilization and no sludge or inorganic fertilizers (control). Then, the soil treatments were used in a pot experiment with perennial ryegrass (Lolium perenne L.) as a test plant. Sludge treated with the clay minerals or biochar improved pH of the acid soil and significantly increased organic matter and available nutrients of both soils compared to control. Although no salinity or sodicity hazard was evidenced, the initial salinity of acid and alkaline soil increased by four‐eight and two‐three times, respectively, upon addition of all sludge treatments, especially that of untreated sludge. Moreover, soil available zinc (Zn) increased by four‐eight times. Soil application of sludge treated with the clay minerals or biochar increased the total aboveground biomass yield of ryegrass in the acid and alkaline soil by 133%–171% and 72%–88%, respectively, compared to control and enhanced nutrient uptake by plants. Furthermore the microbial metabolic quotient indicated lack of low pH and heavy metal stress with addition of sludge to the acid soil. After three harvests of ryegrass, the residual effect of sludge on pH of acid soil and salinity, available phosphorus (P), Zn and boron (B) of both soils still persisted. Thus sewage sludge treated with 15% bentonite, vermiculite or biochar could be applied to soils at a rate of 2% (≈80 Mg ha−1) to serve as soil amendment and fertilizer for grasses and pasture species; however, caution is needed regarding possible P build‐up, Zn phytotoxicity and salinization risks.

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Effects oflong‐termsewage sludge application to a calcareous soil structure

Cited by 5 publications

References 72 publications

Sustainability Assessment after Twenty Years of Sewage Sludge Application on Calcareous Soil Following N or P Criterion

Sustainability Assessment after Twenty Years of Sewage Sludge Application on Calcareous Soil Following N or P Criterion

Nutrient management: as a panacea to improve the caryopsis quality and yield potential of durum wheat (Triticum turgidum L.) under the changing climatic conditions

Sewage sludge treated with bentonite, vermiculite or biochar can improve soil properties and enhance growth of grasses

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