Impacts and interactions of biochar and biosolids on agricultural soil microbial communities during dry and wet-dry cycles

Wang, Daoyuan; Felice, Mark; Scow, Kate M.

doi:10.1016/j.apsoil.2020.103570

Cited by 43 publications

(93 citation statements)

References 65 publications

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“…Du et al (2018) found that peanut-shell biochar (1%) increased microbial populations, microbial biomass, and actinomycetes. However, Wang et al (2020) reported that a high dose of biochar could show a negative impact and a low dose could have a positive impact on soil microbial communities. The authors suggested that such variation of biochar's effects was due to the toxic effect (chemical stress) of biochar on soil microorganisms when applied at a high rate.…”

Section: Biological Propertiesmentioning

confidence: 99%

Biochar and its importance on nutrient dynamics in soil and plant

Hossain

Bahar

Sarkar

et al. 2020

Biochar

429

125

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Biochar, an environmentally friendly soil conditioner, is produced using several thermochemical processes. It has unique characteristics like high surface area, porosity, and surface charges. This paper reviews the fertilizer value of biochar, and its effects on soil properties, and nutrient use efficiency of crops. Biochar serves as an important source of plant nutrients, especially nitrogen in biochar produced from manures and wastes at low temperature (≤ 400 °C). The phosphorus, potassium, and other nutrient contents are higher in manure/waste biochars than those in crop residues and woody biochars. The nutrient contents and pH of biochar are positively correlated with pyrolysis temperature, except for nitrogen content. Biochar improves the nutrient retention capacity of soil, which depends on porosity and surface charge of biochar. Biochar increases nitrogen retention in soil by reducing leaching and gaseous loss, and also increases phosphorus availability by decreasing the leaching process in soil. However, for potassium and other nutrients, biochar shows inconsistent (positive and negative) impacts on soil. After addition of biochar, porosity, aggregate stability, and amount of water held in soil increase and bulk density decreases. Mostly, biochar increases soil pH and, thus, influences nutrient availability for plants. Biochar also alters soil biological properties by increasing microbial populations, enzyme activity, soil respiration, and microbial biomass. Finally, nutrient use efficiency and nutrient uptake improve with the application of biochar to soil. Thus, biochar can be a potential nutrient reservoir for plants and a good amendment to improve soil properties.

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Section: Biological Propertiesmentioning

confidence: 99%

Biochar and its importance on nutrient dynamics in soil and plant

Hossain

Bahar

Sarkar

et al. 2020

Biochar

429

125

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“…47,48 Several pieces of evidence have also suggested that microplastics might be transported from the surface into the soil system through cracking or movement of living organisms, 49,50 and the physicochemical properties of surrounding media are varied and complicated similar to aquatic environments. [51][52][53][54] Since we have no knoweldge to predict the effects of chemical additive in such soil media from first principles, data from experimental studies are needed.…”

Section: Introductionmentioning

confidence: 99%

Effects of Different Microplastics on Nematodes in the Soil Environment: Tracking the Extractable Additives Using an Ecotoxicological Approach

Kim

Waldman

Kim

et al. 2020

Environ. Sci. Technol.

157

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With an increasing interest in the effects of microplastic in the soil environment, there is a need to thoroughly evaluate potential adverse effects of these particles as a function of their characteristics (size, shape, and composition). In addition, extractable chemical additives from microplastic have been identified as an important toxicity pathway in the aquatic environment. However, we currently know little about effects of such additives in the soil environment. In this study on nematodes (Caenorhabditis elegans), we adopted an ecotoxicological approach to assess the potential effects of thirteen different microplastics with different characteristics and extractable additives. We found that toxic effects appear to increase in the order of low-density polyethylene (LDPE) film < polypropylene (PP) fragments < high-density polyethylene (HDPE) fragments ≈ polystyrene (PS) fragments < polyethylene terephthalate (PET) fragments ≈ polyacrylicnitrile (PAN) fibers. Acute toxicity was mainly attributed to the extractable additives: when the additives were extracted, the toxic effects of each microplastic disappeared in the acute soil toxicity test. The harmful effects of LDPE film and PAN fibers increased when the microplastics were maintained in soil for a longterm period with frequent wet-dry cycles. We here provide clear evidence that microplastic toxicity in the soil is highly related to particle characteristics and extractable additives. Our results suggest that future experiments consider extractable additives as a key explanatory variable.

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“…Among the most promising remediation techniques to treat heavy metal polluted wastes and soil used are the application of lime [32], phosphates [29,33], biosolids [34,35], composts [36] and the application of amendments with biochar [12,15,37]. Although the application of biosolids and composts decreases the bioavailability of metals, their effect is variable depending on the metal, soil type, dose, type, and degree of humification of organic matter [38,39].…”

Section: Agrostabilization Of Mine Waste and Polluted Soilsmentioning

confidence: 99%

The Use of Biochar of High Growth Rate Plants to Agriculturally Remediate Heavy Metal Polluted Acidic Mine Wastes

Gómez¹,

Balderas²,

Moreno³

et al. 2022

Recent Perspectives in Pyrolysis Research

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The chapter is meant to expose how a sound methodology can be instrumented to both, remediate acidic metal polluted mine wastes, taking advantage of the neutralizing power and high metal sorption affinity of biochar, and to utilize pyrolyzed material derived from high-rate growth plants (water hyacinth, Eichhornia crassipes Mart, and Eucalyptus, Eucalyptus globulus Labill), which have become of ecological relevance due to their unwanted proliferation over specific terrestrial, lacustrine or riverine environments. In addition, the proposal considers not only neutralizing the mine tailings and abating the toxic levels of specific heavy metals like Pb, Cd, Cu, Zn, etc., to fulfill the international and national standards and norms, but to conveniently combine biochar with widely used soil amendments to pass widely recognized biological tests of growth using heavy metal-sensitive plants. The approach addresses firstly: a) characterizing physiochemically mine tailings and biochar, in terms of their properties (metal speciation and contents, potential acidity and neutralization potential, chemical oxygen demand, heavy metal-biochar sorption-complexing affinities, among others), and secondly; b) creating a” fertile environment” by reconditioning, agriculturally, the heavy metal-polluted acidic mine waste to allow native vegetation, or other reforesting species, to regrow on the reclaimed site, based on the bioassay tests performances.

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Impacts and interactions of biochar and biosolids on agricultural soil microbial communities during dry and wet-dry cycles

Cited by 43 publications

References 65 publications

Biochar and its importance on nutrient dynamics in soil and plant

Biochar and its importance on nutrient dynamics in soil and plant

Effects of Different Microplastics on Nematodes in the Soil Environment: Tracking the Extractable Additives Using an Ecotoxicological Approach

The Use of Biochar of High Growth Rate Plants to Agriculturally Remediate Heavy Metal Polluted Acidic Mine Wastes

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