Associative effects of lignin-derived biochar and arbuscular mycorrhizal fungi applied to soil polluted from Pb-acid batteries effluents on barley grain safety

Khan, Muhammad Asaf; Mahmood-ur-Rahman,; Ramzani, Pia Muhammad Adnan; Zubaır, Muhammad; Rasool, Bilal; Khan, Muhammad Kamran; Ahmed, Awadelkarim Hamid; Khan, Shahbaz Ali; Turan, Veysel; Iqbal, Muhammad

doi:10.1016/j.scitotenv.2019.136294

Cited by 127 publications

(38 citation statements)

References 53 publications

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“…We documented this with values of fresh plant (AGB, root) biomass in the digestate + biochar and digestate + biochar + Humac variants which exhibited concurrently the highest C:N ratio. We found a consent with studies referring on partially improved properties of biochar due to digestate co-treatment [ 46 ], including improved availability of nutrients [ 47 ]. However, not even these studies demonstrated that the higher access to nutrients might lead to the increased crop yield [ 46 – 50 ].…”

Section: Discussionmentioning

confidence: 92%

Effect of carbon-enriched digestate on the microbial soil activity

et al. 2021

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Objectives As a liquid organic fertilizer used in agriculture, digestate is rich in many nutrients (i.e. nitrogen, phosphorus, sulfur, calcium, potassium); their utilization may be however less efficient in soils poor in organic carbon (due to low carbon:nitrogen ratio). In order to solve the disadvantages, digestate enrichment with carbon-rich amendments biochar or humic acids (Humac) was tested. Methods Soil variants amended with enriched digestate: digestate + biochar, digestate + Humac, and digestate + combined biochar and humic acids—were compared to control with untreated digestate in their effect on total soil carbon and nitrogen, microbial biomass carbon, soil respiration and soil enzymatic activities in a pot experiment. Yield of the test crop lettuce was also determined for all variants. Results Soil respiration was the most significantly increased property, positively affected by digestate + Humac. Both digestate + biochar and digestate + Humac significantly increased microbial biomass carbon. Significant negative effect of digestate + biochar (compared to the control digestate) on particular enzyme activities was alleviated by the addition of humic acids. No significant differences among the tested variants were found in the above-ground and root plant biomass. Conclusions The tested organic supplements improved the digestate effect on some determined soil properties. We deduced from the results (carbon:nitrogen ratio, microbial biomass and activity) that the assimilation of nutrients by plants increased; however, the most desired positive effect on the yield of crop biomass was not demonstrated. We assume that the digestate enrichment with organic amendments may be more beneficial in a long time-scaled trial.

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Section: Discussionmentioning

confidence: 92%

Effect of carbon-enriched digestate on the microbial soil activity

et al. 2021

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“…Our results are also supported by Sharif, Khattak & Sarir (2002) who reported that HA addition to the soil generally reduce P fixation and increase the recovery of P. Similarly, Zhang et al (1994) observed that in the rice field, organic P linearly increase with the amendments of P fertilizers. Improvement in grain P concentration of maize crops is in line with Khan et al (2020) who reported that as the level of organic substitution increased from 25–75%, the phosphorus content exhibit a progressive increase. Roy & Tripathi (1987) also reported increase in nutrient content and uptake with increasing application of P. Our results oppose the findings of Ibrahim et al (2011) who reported linear decrease in P uptake with the increments of fertilizer P. According to Jamal et al (2018) , application of different levels of P and HA either applied alone or in combination significantly increased soil P concentration over control.…”

Section: Discussionsupporting

confidence: 83%

Comparing the phosphorus use efficiency of pre-treated (organically) rock phosphate with soluble P fertilizers in maize under calcareous soils

Mussarat

Husnain

Muhammad

et al. 2021

PeerJ

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In calcareous soils, phosphorus (P) availability to plant is impaired due to the formation of insoluble complexes with calcium and magnesium. Therefore, this study was executed to compare the P use efficiency (PUE) of four different P sources [rock phosphate (RP), acidulated rock phosphate (ARP), single super phosphate (SSP) and di ammonium phosphate (DAP)] alone or pre-treated with organic amendments (farm yard manure (FYM) enriched compost, simple compost and humic acid (HA)) along with control in maize crop under calcareous soils. All treatments irrespective of P sources received 90 kg P2O5 ha−1. Phosphorus application regardless of its sources and combination with organic amendments significantly improved maize growth, yield as well as P uptake and PUE. Rock phosphate when applied alone was recorded inferior but its performance significantly improved with compost or its pre-addition with FYM and HA, that further enhanced upon acidulation. Maize grain yield increased by 21, 22.2, 67.9 and 94% with RP, ARP, ARP enriched compost and ARP+ compost respectively, over control. Similarly, PUE of DAP improved from 31.7 to 43.1 and 39 with sample and enriched compost correspondingly. Post-harvest soil and grain P were at par for SSP, ARP and DAP alone or in conjugation with organic amendments when averaged across the amendments. These results suggested that pretreatment of P sources with organic amendments is an economical and more feasible approach to improve maize yield and PUE. Moreover, on-farm acidulation of RP may give at par results with SSP and DAP with cheaper rate and hence recommended for P management in maize in alkaline calcareous soils.

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“…Increased enzymatic activities in the soil may be due to the reduction in Pb stress on microbiota. This may have been achieved by binding Pb in soil and transforming Pb into unavailable speciation (Khan et al, 2020;Naeem et al, 2021). Biochar and chicken manure may improve soil nutrients, water retention capacity, and porosity to create a suitable environment for the soil microbiota.…”

Section: Discussionmentioning

confidence: 99%

Combined effects of biochar and chicken manure on maize (Zea mays L.) growth, lead uptake and soil enzyme activities under lead stress

Liu

Li²,

Guang-hai

et al. 2021

PeerJ

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The goal of the present work was to evaluate the additive effects of biochar and chicken manure on maize growth in Pb-contaminated soils. In this study, we conducted a pot experiment to investigate how biochar in soil (20, 40 g·kg−1), chicken manure in soil (20, 40 g·kg−1), or a combination of biochar and chicken manure in soil (each at 20 g·kg−1) effect maize growth, Pb uptake, leaves’ antioxidant enzymatic activities, and soil enzyme activities under artificial conditions to simulate moderate soil pollution (800 Pb mg·kg−1). The results showed that all biochar and/or chicken manure treatments significantly (P < 0.05) increased maize plant height, biomass, and superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) activity but decreased the malondialdehyde (MDA) content. These results indicated that amending the soil with biochar and/or chicken manure could alleviate Pb’s phytotoxicity. The biochar and/or chicken manure treatments remarkably decreased the Pb concentration in maize roots, stems, leaves, bioconcentration factor (BCF), translocation factor (TF), and available Pb concentration in the soil. Amending the soil with chicken manure alone was more effective at increasing maize growth and antioxidant enzymatic activity; the biochar treatment alone was more effective at inducing soil alkalinization and contributing to Pb immobilization. The combined use of biochar and chicken manure had an additive effect and produced the largest increases in maize growth, leaves’ antioxidant enzymatic activity, and soil enzyme activity. Their combined use also led to the most significant decreases in maize tissues Pb and soil available Pb. These results suggest that a combination of biochar and chicken manure was more effective at reducing soil Pb bioavailability and uptake by maize tissues, and increasing maize growth. This combination increased plant height by 43.23% and dry weight by 69.63% compared to the control.

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Associative effects of lignin-derived biochar and arbuscular mycorrhizal fungi applied to soil polluted from Pb-acid batteries effluents on barley grain safety

Cited by 127 publications

References 53 publications

Effect of carbon-enriched digestate on the microbial soil activity

Effect of carbon-enriched digestate on the microbial soil activity

Comparing the phosphorus use efficiency of pre-treated (organically) rock phosphate with soluble P fertilizers in maize under calcareous soils

Combined effects of biochar and chicken manure on maize (Zea mays L.) growth, lead uptake and soil enzyme activities under lead stress

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