A Review on Current Status of Biochar Uses in Agriculture

Allohverdi, Tara; Mohanty, Amar K.; Roy, Poritosh; Misra, Manjusri

doi:10.3390/molecules26185584

Cited by 94 publications

(33 citation statements)

References 94 publications

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“…It is well known that biochar improves WHC through surface area and porosity; with the addition of 1%-100% biochar, there is an increase from approximately 5% to 1,612.5% WHC (Yu et al, 2013;Razzaghi et al, 2019;Allohverdi et al, 2021). The results of the current study are concurrent with those of Verheijen et al (2019) and Yu et al (2013).…”

Section: Discussionsupporting

confidence: 86%

“…The soil in this study was silty clay and was heavily compacted, so the addition of porous biochar and granular BOF greatly improved soil structure, increased soil permeability, reduced VW, and enhanced WHC, and this may also be an important reason for promoting plant growth. Biochar can also have a variety of effects on soil pH, the degree to which is often dependent on the feedstock and production conditions (Allohverdi et al, 2021). The addition of biochar and BOF in this study did not change the pH of the saline-alkali soil, perhaps because the low temperature used to produce the biochar resulted in the low pH of biochar used in the current study; it could also be related to the already neutral-alkaline pH of the soil, or it might Frontiers in Environmental Science frontiersin.org be because of the secretion of organic acids (e.g., citric, oxalic, and malic acids) from the stimulated roots of plants under fertilizer treatment (Hinsinger et al, 2003;You et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

“…to varying degrees, because of its ability to directly provide nutrients for plant uptake, to absorb and retain soil nutrients (Borchard et al, 2014;Zhang et al, 2016;Laskosky et al, 2020;Allohverdi et al, 2021), and to improve microbial habitat (Chen et al, 2017). In the current study, BOF was added, so soil nutrients were notably improved; moreover, fine and medium biochar gave significantly better results than coarse biochar, which agrees with Chen et al (2017); in the meantime, the AN and AP of fine and medium biochar were higher compared with coarse biochar, whereas the N and P were the opposite, which may be because of the conversion of N and P into AN and AP by more microorganisms residing in the fine biochar (Sarfraz et al, 2020;Allohverdi et al, 2021). Many aspects of biochar affect microbial populations, such as feedstock, pyrolysis conditions, particle size, and soil properties.…”

Section: Discussionmentioning

confidence: 99%

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Effect of different biochar particle sizes together with bio-organic fertilizer on rhizosphere soil microecological environment on saline–alkali land

Zhang

Liang

et al. 2022

Front. Environ. Sci.

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The application of biochar and bio-organic fertilizers (BOFs) is effective for improving soil ecological environments. However, soil physicochemical properties and the microbiome diversity of rhizosphere soil after the application of different-sized particles of biochar together with BOF in saline–alkali land have not been thoroughly described. A field experiment was performed to investigate the effects of different-sized particles of apple shoot biochar (60, 30, and 10 mesh) together with BOF on soil bacteria (using Illumina high-throughput sequencing) and the physicochemical properties of Mesembryanthemum cordifolium L. f. grown on saline–alkali land. Results indicated that the combined application of BOF and 10–60 mesh biochar reduced the volumetric weight of soil by 14%–29%, respectively, and additionally decreased soil electrical conductivity, increased the aerial biomass of the M. cordifolium L. f. by over 30%, and notably improved soil water–holding capacity, with 60 mesh giving the best results; organic carbon (OC), organic matter (OM), total nitrogen (N), available phosphorus, alkaline nitrogen, total potassium (K), and total phosphorus (P) were all significantly increased by the addition of combined biochar and BOF; thereinto, field capacity, N, P, K, OC, and OM were positively correlated with the bacterial community structure of coapplied biochar and BOF. There were no significant differences in the richness of total bacteria among the treatments; Proteobacteria, Actinobacteria, and Chloroflexi accounted for >70% of the total bacteria in each treatment; Norank_f__Geminicoccaceae and Micromonospora were the dominant genera across the treatments. The findings suggested that plant growth, physicochemical properties, and community diversity of rhizosphere bacteria in saline–alkali land were significantly positively influenced by biochar 60 mesh plus BOF, followed by biochar 10 and 30 mesh plus BOF. This conclusion could facilitate the study of the ecological functions of biochar and BOF, as well as their interactions with salt-tolerant plants on saline–alkali soil, which can be used to provide exploration ideas for saline–alkali land improvement.

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Section: Discussionsupporting

confidence: 86%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of different biochar particle sizes together with bio-organic fertilizer on rhizosphere soil microecological environment on saline–alkali land

Zhang

Liang

et al. 2022

Front. Environ. Sci.

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“…The application of biochar can benefit the agricultural sector in many ways, as reviewed in Allohverdi et al (2021) . Biochar can improve the stability and water holding capacity of soils ( Basso et al, 2013 ), modify and control microbial soil populations ( Bai et al, 2019 ; Kamau et al, 2019 ; Chew et al, 2020 ), and reduce the need for fertilizer as well as fertilizer leaching ( Zhang et al, 2021 ; Zhou et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Overview of the use of biochar from main cereals to stimulate plant growth

2022

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The total global food demand is expected to increase up to 50% between 2010 and 2050; hence, there is a clear need to increase plant productivity with little or no damage to the environment. In this respect, biochar is a carbon-rich material derived from the pyrolysis of organic matter at high temperatures with a limited oxygen supply, with different physicochemical characteristics that depend on the feedstock and pyrolysis conditions. When used as a soil amendment, it has shown many positive environmental effects such as carbon sequestration, reduction of greenhouse gas emissions, and soil improvement. Biochar application has also shown huge benefits when applied to agri-systems, among them, the improvement of plant growth either in optimal conditions or under abiotic or biotic stress. Several mechanisms, such as enhancing the soil microbial diversity and thus increasing soil nutrient-cycling functions, improving soil physicochemical properties, stimulating the microbial colonization, or increasing soil P, K, or N content, have been described to exert these positive effects on plant growth, either alone or in combination with other resources. In addition, it can also improve the plant antioxidant defenses, an evident advantage for plant growth under stress conditions. Although agricultural residues are generated from a wide variety of crops, cereals account for more than half of the world’s harvested area. Yet, in this review, we will focus on biochar obtained from residues of the most common and relevant cereal crops in terms of global production (rice, wheat, maize, and barley) and in their use as recycled residues to stimulate plant growth. The harvesting and processing of these crops generate a vast number and variety of residues that could be locally recycled into valuable products such as biochar, reducing the waste management problem and accomplishing the circular economy premise. However, very scarce literature focused on the use of biochar from a crop to improve its own growth is available. Herein, we present an overview of the literature focused on this topic, compiling most of the studies and discussing the urgent need to deepen into the molecular mechanisms and pathways involved in the beneficial effects of biochar on plant productivity.

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“…El biochar es un material rico en nutrientes producido a partir de pirolización de biomasa, evitando su rápida oxidación a CO 2 , que atrae la atención para fines de enmienda del suelo, mejora del rendimiento de los cultivos y secuestro de carbono (Allohverdi et al, 2021). Los biofertilizantes, también llamados inoculantes microbianos, son microorganismos que mejoran la disponibilidad de nutrientes, contribuyendo a la nutrición de las plantas ya sea facilitando la absorción de nutrientes o aumentando la disponibilidad de nutrientes primarios en la rizósfera (Pereg y McMillan, 2015;Nosheen et al, 2021).…”

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