Functional Relationships of Soil Acidification, Liming, and Greenhouse Gas Flux

Kunhikrishnan, Anitha; Thangarajan, Ramya; Bolan, Nanthi; Xu, Yan; Mandal, Sanchita; Gleeson, Deirdre; Seshadri, Balaji; Zaman, M.; Barton, Louise; Tang, Caixian; Luo, Jiafa; Dalal, Ram C.; Ding, Weixin; Kirkham, M.B.; Naidu, Ravi

doi:10.1016/bs.agron.2016.05.001

Cited by 159 publications

(109 citation statements)

References 271 publications

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“…To our knowledge, this is the first report that BA could mitigate the emissions of N 2 O in agricultural soils. Nitrous oxide flux dynamics can be influenced by many factors, including pH, soil temperature, water content, soil mineral N content and microbial communities (Butterbach‐Bahl et al., ; Kunhikrishnan et al., ; Ravishankara et al., ). For the pot experiment in this study, the most important factors distinguishing between different treatments were pH and soil mineral N content.…”

Section: Discussionmentioning

confidence: 99%

“…These changes in the chemical properties of soil impacted the activities of microbes involved in N cycling and led to the mitigation of N 2 O emissions. Many studies have shown that during the nitrification process, the conversion of NO 2 − to NO 3 − is limited in acidic soil because of the relatively low activities of nitrite‐oxidizing bacteria, which enhances the possibility of NO 2 − being reduced to N 2 O (Kunhikrishnan et al., ; Zhu, Burger, Doane, & Horwath, ). Nevertheless, an increase in soil pH facilitates the immediate conversion of NO 2 − to NO 3 − , thus limiting the availability of NO 2 − for its reduction to N 2 O (Clough, Kelliher, Sherlock, & Ford, ).…”

Section: Discussionmentioning

confidence: 99%

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Mitigation of nitrous oxide emissions from acidic soils by Bacillus amyloliquefaciens, a plant growth‐promoting bacterium

Zhuang

Zhang

et al. 2018

Global Change Biology

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Nitrous oxide (N O) is a long-lived greenhouse gas that can result in the alteration of atmospheric chemistry and cause accompanying changes in global climate. To date, many techniques have been used to mitigate the emissions of N O from agricultural fields, which represent one of the most important sources of N O. In this study, we designed a greenhouse pot experiment and a microcosmic serum bottle incubation experiment using acidic soil from a vegetable farm to study the effects of Bacillus amyloliquefaciens (BA) on plant growth and N O emission rates. The addition of BA to the soil promoted plant growth enhanced the soil pH and increased the total nitrogen (TN) contents in the plants. At the same time, it decreased the concentrations of ammonium (NH ), nitrate (NO ) and TN in the soil. Overall, the addition of BA resulted in a 50% net reduction of N O emissions compared with the control. Based on quantitative PCR and the network analysis of DNA sequencing, it was demonstrated that BA partially inhibited the nitrification process through the significant reduction of ammonia oxidizing bacteria. Meanwhile, it enhanced the denitrification process, mainly by increasing the abundance of N O-reducing bacteria in the treatment with BA. The results of our microcosm experiment provided evidence that strongly supported the above findings under more strictly controlled laboratory conditions. Taken together, the results of our study evidently demonstrated that BA has dual effects on the promotion of plant growth and the dramatic reduction of greenhouse emissions, thus suggesting the possibility of screening beneficial microbial organisms from the environment that can promote plant growth and mitigate greenhouse trace gases.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Mitigation of nitrous oxide emissions from acidic soils by Bacillus amyloliquefaciens, a plant growth‐promoting bacterium

Zhuang

Zhang

et al. 2018

Global Change Biology

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“…On the other hand, liming‐induced changes in soil structure (as Ca in lime binds with soil ions) would lead to stabilization of soil macroaggregates and thus to higher soil C accumulation (Kunhikrishnan et al. ). It could also be that higher microbial activities in limed soils will contribute to increase microbial waste and thus C detritus, which is incorporated and stabilized into smaller soil organo‐mineral fractions (Fornara et al.…”

Section: Discussionmentioning

confidence: 99%

“…Our study specifically tested the following hypotheses: (1) total root mass will decrease while rates of root decomposition will increase under long-term multiple nutrient (e.g., N, P, K, Mg) additions; (2) total root mass will decrease under grazing, partly because of increased nutrient additions to soils from grazing animals and partly because of plant aboveground responses to biomass removal by grazers (Holland et al 1996); (3) AMF colonization will increase in chronically N-fertilized soils, which have not received any inorganic P addition for decades thus leading to greater P limitation for plant growth; (4) liming-induced increases in soil pH by stimulating soil NO 3 availability (Kunhikrishnan et al 2016) and microbial activity (Fornara et al 2011) will lead to lower root mass, higher rates of root decomposition, and greater AMF colonization to acquire inorganic P from soils (Johnson et al 2003).…”

Section: Introductionmentioning

confidence: 99%

Long‐term belowground effects of grassland management: the key role of liming

Heyburn

McKenzie

Crawley

et al. 2017

Ecological Applications

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The functioning of human-managed grassland ecosystems strongly depends on how common management practices will affect grassland "belowground compartment" including soil biogeochemistry and plant roots. Key questions remain about how animal grazing, liming (e.g., the addition of CaCO to soils), and nutrient fertilization might affect, in the long-term, soil nutrient cycling and multiple root traits. Here we focus on a mesotrophic grassland located in Berkshire, UK, where contrasting levels of rabbit grazing, liming, and different inorganic fertilizers have been applied since 1991. We ask how (1) soil nitrogen (N) availability and cycling, (2) total root mass, (3) root mass decomposition, and (4) arbuscular mycorrhizal fungal (AMF) root colonization might respond to 22 years of very different management. We found that liming strongly affected total root mass, root decomposition, root AMF colonization as well as soil N availability and cycling and that these effects were mainly driven by liming-induced increases in soil pH. Increases in soil pH were associated with significant (1) decreases in root mass, (2) increases in root mass decomposability and in the mineralization of N in decomposing root detritus, and (3) increases in AMF infection. Soil pH was also significantly related to greater N availability (i.e., soil NO levels) and to lower δ N natural abundance, which suggests more efficient N uptake by plants in limed soils as we found in our study. The application of multiple nutrients (N, P, K, Mg) also reduced total root mass, while N-only fertilization was associated with greater AMF infection. Surprisingly the long-term impact of grazing was generally weak and not significant on most plant and soil parameters. Despite soil pH affecting most belowground variables, changes in soil pH were not associated with any change in soil C and N stocks. Because liming can improve nutrient cycling (and benefits soil pH and grass yields) without negatively affecting soil C sequestration, we suggest that regular liming applications may provide management solutions for increasing the long-term sustainability of permanent grassland.

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“…Due to soil acidification caused either by the legume cultivation or other aforementioned processes, the activities of soil organisms are reduced, resulting in the inhibition of the decomposition of organic matter. Similarly, the concentrations of Al and Mn also increased which is hazardous for the plant growth . However, in soil system the share of low‐molecular‐weight (organic) acids originated from legume was only 40–80% of plant excess cations or ash alkalinity.…”

Section: Bioavailability Of Ptes In Contaminated Soilsmentioning

confidence: 99%

Bioaccumulation of Potentially Toxic Elements in Cereal and Legume Crops: A Review

Murtaza

Usman²,

Niazi

et al. 2017

CLEAN Soil Air Water

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Contamination of soil and water with potentially toxic elements (PTEs) has become a global environmental concern that could pose potential risks to human health and agriculture. The major anthropogenic sources of PTEs contamination include coal combustion processes, leather tanning operations, mining, smelting activities, and use of sewage water for irrigation. Scattered studies are available in the literature that determines the sources, bioavailability, and potential hazards due to PTEs contamination to crop plants and, ultimately, to human beings. This article reviews how solid‐ and solution‐phase chemistry of soil and existing plant species influence the bioavailability of PTEs to cereal and legume plants, along with the mechanisms involved in the uptake and accumulation. This article also describes the phytotoxic effects of PTEs and strategies to overcome these toxic effects by identifying highly tolerant cereals and legumes. Moreover, this article also summarizes recent advances in the field application and discusses perspectives to reduce PTEs accumulation in cereal and legume crops.

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Functional Relationships of Soil Acidification, Liming, and Greenhouse Gas Flux

Cited by 159 publications

References 271 publications

Mitigation of nitrous oxide emissions from acidic soils by Bacillus amyloliquefaciens, a plant growth‐promoting bacterium

Mitigation of nitrous oxide emissions from acidic soils by Bacillus amyloliquefaciens, a plant growth‐promoting bacterium

Long‐term belowground effects of grassland management: the key role of liming

Bioaccumulation of Potentially Toxic Elements in Cereal and Legume Crops: A Review

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