Biochar particle size and<i>Rhizobia</i>strains effect on the uptake and efficiency of nitrogen in lentils

Billah, Muhammad Mutasim; Ahmad, Wiqar; Ali, Murad

doi:10.1080/01904167.2019.1628984

Cited by 18 publications

(8 citation statements)

References 46 publications

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“…In addition to greater nodule biomass, our inoculated seedlings had reduced δ 15 N in all tissues relative to the non-inoculated seedlings, revealing that dilution of fertilizer-supplied isotopic N was occurring because of additions of BNF within the nodules, similar to the results for several species (grain legumes [64]; grain legumes [58]; lentils [65]; and black locust [21]).…”

Section: Discussionsupporting

confidence: 79%

Interaction of Biochar Type and Rhizobia Inoculation Increases the Growth and Biological Nitrogen Fixation of Robinia pseudoacacia Seedlings

Sun

Liu

et al. 2020

Forests

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Adding biochar to soil can change soil properties and subsequently affect plant growth, but this effect can vary because of different feedstocks and methods (e.g., pyrolysis or gasification) used to create the biochar. Growth and biological nitrogen fixation (BNF) of leguminous plants can be improved with rhizobia inoculation that fosters nodule development. Thus, this factorial greenhouse study examined the effects of two types of biochar (i.e., pyrolysis and gasification) added at a rate of 5% (v:v) to a peat-based growth substrate and rhizobia inoculation (yes or no) on Robinia pseudoacacia (black locust) seedlings supplied with 15NH415NO3. Seedling and nodule growth, nitrogen (N) content, and δ15N × 1000 were evaluated after 3 months. While addition of biochar without inoculation had no effect on seedling growth, inoculation with rhizobia increased seedling growth, BNF, and N status. Inoculated seedlings had reduced δ15N, indicating that N provided via fertilization was being diluted by N additions through BNF. Biochar type and inoculation interacted to affect seedling growth. Combining inoculation with either biochar type increased seedling leaf, stem, and total biomass, whereas gasifier biochar and inoculation improved all seedling growth variables and nodule biomass.

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Section: Discussionsupporting

confidence: 79%

Interaction of Biochar Type and Rhizobia Inoculation Increases the Growth and Biological Nitrogen Fixation of Robinia pseudoacacia Seedlings

Sun

Liu

et al. 2020

Forests

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“…Prior results on particle size effects on plant growth have been mixed in individual studies. Stem growth of Salix viminalis on a contaminated technosol was greatest at a biochar size of 0.2-0.4 mm [61], while lentil (Lens culinaris) had a reduced biomass improvement or even a decrease with particle sizes of <2 mm compared to 5-10 mm in a silt loam agricultural soil [62]. Brassica chinensis showed no biochar particle size effects among three size categories (<0.5 mm, 0.5-2 mm and 2-5 mm) on a contaminated yellow ferralsol [57], and Hordeum vulgare responded well to both sizes tested (<0.15 mm or >0.15 mm) in a commercial garden soil [42].…”

Section: Discussionmentioning

confidence: 95%

Optimizing Biochar Particle Size for Plant Growth and Mitigation of Soil Salinization

2023

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Pyrolyzed waste biomass, or biochar, has been suggested as a means to increase plant growth and mitigate soil salinization, which is a widespread agricultural issue and can reach extreme levels in urban soils impacted by de-icing salts. Soil mixing is enhanced by reduced biochar particle size; however, biochar properties vary with particle size, and recent studies have suggested that plant growth responses may be maximized at intermediate particle sizes. We examined the responses of two plant species (cowpea (Vigna unguiculata) and velvetleaf (Abutilon theophrasti)) to biochar amendments that spanned a wide range of particle sizes obtained by sieving, with and without de-icing salt additions. The smallest size fractions of biochar reduced plant growth relative to unamended controls. Plant biomass production was generally maximized at intermediate biochar particle size treatments, with particle sizes of 0.5–2.0 mm showing the best response. Mitigation of salt effects was also improved at intermediate biochar particle sizes in this particle size range. Our results emphasize the importance of optimizing biochar particle size to best enhance plant responses to biochar, with particular reference to saline soils.

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“…Limitations on this observation should, however, be noted. While the particle size meta-analysis does include some field observations, these derive from only 3 published papers (Billah et al 2018(Billah et al , 2019Manzoor et al 2019) that only consider responses of leguminous crops in arid environments. In addition, no single published study on plant responses has considered more than three particle size categories.…”

Section: Discussionmentioning

confidence: 99%

Post-processing of biochars to enhance plant growth responses: a review and meta-analysis

Thomas

2021

Biochar

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A number of processes for post-production treatment of “raw” biochars, including leaching, aeration, grinding or sieving to reduce particle size, and chemical or steam activation, have been suggested as means to enhance biochar effectiveness in agriculture, forestry, and environmental restoration. Here, I review studies on post-production processing methods and their effects on biochar physio-chemical properties and present a meta-analysis of plant growth and yield responses to post-processed vs. “raw” biochars. Data from 23 studies provide a total of 112 comparisons of responses to processed vs. unprocessed biochars, and 103 comparisons allowing assessment of effects relative to biochar particle size; additional 8 published studies involving 32 comparisons provide data on effects of biochar leachates. Overall, post-processed biochars resulted in significantly increased average plant growth responses 14% above those observed with unprocessed biochar. This overall effect was driven by plant growth responses to reduced biochar particle size, and heating/aeration treatments. The assessment of biochar effects by particle size indicates a peak at a particle size of 0.5–1.0 mm. Biochar leachate treatments showed very high heterogeneity among studies and no average growth benefit. I conclude that physiochemical post-processing of biochar offers substantial additional agronomic benefits compared to the use of unprocessed biochar. Further research on post-production treatments effects will be important for biochar utilization to maximize benefits to carbon sequestration and system productivity in agriculture, forestry, and environmental restoration.

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Biochar particle size andRhizobiastrains effect on the uptake and efficiency of nitrogen in lentils

Cited by 18 publications

References 46 publications

Interaction of Biochar Type and Rhizobia Inoculation Increases the Growth and Biological Nitrogen Fixation of Robinia pseudoacacia Seedlings

Interaction of Biochar Type and Rhizobia Inoculation Increases the Growth and Biological Nitrogen Fixation of Robinia pseudoacacia Seedlings

Optimizing Biochar Particle Size for Plant Growth and Mitigation of Soil Salinization

Post-processing of biochars to enhance plant growth responses: a review and meta-analysis

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