Nitrogen-Cycling Communities in Organically Amended Versus Conventionally Managed Agricultural Soil

Pereg, Lily; McMillan, Mary

doi:10.1007/978-981-13-7264-3_11

Cited by 3 publications

(5 citation statements)

References 140 publications

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“…However, the impact of organic fertilizer use on soil microbial nitrogen fixation remains a contentious issue. Previous studies support the positive effects of organic fertilizers on nitrogen fixation . However, long-term studies on the effects of different fertilization treatments on nitrogen fixation indicate that, regardless of the type of fertilizer applied, a sustained inhibitory effect was observed .…”

Section: Discussionmentioning

confidence: 92%

“…Previous studies support the positive effects of organic fertilizers on nitrogen fixation. 12 However, long-term studies on the effects of different fertilization treatments on nitrogen fixation indicate that, regardless of the type of fertilizer applied, a sustained inhibitory effect was observed. 8 Combined with our results regarding the impact of different organic fertilizer replacement rates on nitrogenase activity (Figure S1), one inference is that nitrogen fixation is constrained by the replacement rate of organic fertilizer.…”

Section: Species Interactions and Functional Interplay In Bacterial C...mentioning

confidence: 99%

“…Recent research indicates that long-term nitrogen fertilization suppresses microbial nitrogen fixation and leads to the enrichment of specific taxa that regulate fixation rates, regardless of whether the source is organic or inorganic . However, it is noteworthy that there is ample evidence suggesting that the addition of organic fertilizers can enhance the abundance and activity of nitrogen-fixing communities in the environment. − Studies have shown that the addition of organic matter to flooded paddy soils under aerobic conditions can increase nitrogen fixation. Additionally, the introduction of glucose to farmland soils was found to stimulate nitrogen fixation, particularly under anaerobic conditions. , Moreover, it is well recognized that nitrogen fixation is an energy-intensive process, and carbon sources are crucial for microbial metabolic activities. , Organic fertilizers, with their higher carbon-to-nitrogen ratio, can improve soil organic matter content. , Given the existing evidence, there is a compelling reason to believe that organic fertilizers possess the potential to promote nitrogen fixation.…”

Section: Introductionmentioning

confidence: 99%

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Degradation of Complex Carbon Sources in Organic Fertilizers Facilitates Nitrogen Fixation

Huang,

Ma,

Liu

et al. 2024

J. Agric. Food Chem.

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Biological nitrogen fixation is crucial for agriculture and improving fertilizer efficiency, but organic fertilizers in enhancing this process remain debated. Here, we investigate the impact of organic fertilizers on biological nitrogen fixation through experiments and propose a new model where bacterial interactions with complex carbon sources enhance nitrogen fixation. Field experiments showed that adding organic fertilizers increased the nitrogenase activity by 57.85%. Subculture experiments revealed that organic fertilizer addition enriched genes corresponding to complex carbon and energy metabolism, as well as nifJ involved in electron transfer for nitrogenase. It also enhanced bacterial interactions and enhanced connectors associated with complex carbon degradation. Validation experiments demonstrated that combinations increased nitrogenase activity by 2.98 times compared to the single. Our findings suggest that organic fertilizers promoted nitrogen fixation by enhancing microbial cooperation, improved the degradation of complex carbon sources, and thereby provided utilizable carbon sources, energy, and electrons to N-fixers, thus increasing nitrogenase activity and nitrogen fixation.

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Section: Discussionmentioning

confidence: 92%

Section: Species Interactions and Functional Interplay In Bacterial C...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Degradation of Complex Carbon Sources in Organic Fertilizers Facilitates Nitrogen Fixation

Huang,

Ma,

Liu

et al. 2024

J. Agric. Food Chem.

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“…Over-reliance on chemical inputs can disrupt ecological equilibrium and pose risks to both human health and the environment. Nitrate Pollution in Water Bodies: The intensified agricultural practices in orchards, especially the application of nitrogen-rich fertilizers, have contributed to elevated nitrate concentrations in local water bodies [46]. Excess nitrate in water can lead to water pollution, with adverse effects on aquatic life as well as health concerns for human populations relying on contaminated water sources [47].…”

Section: Discussionmentioning

confidence: 99%

The Impact of Rural E-Commerce Environment Development on Orchard Expansion from the Perspective of Tele-Coupling: The Case of Pinghe County in Southeast China

Liao,

Wu,

Huang

2023

Land

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This investigation delves into the profound interplay between the e-commerce environment and the agricultural system while scrutinizing the intricate human-land coupling dynamics engendered by transformations within the agricultural domain. Focusing on the expansion of orchards in Pinghe County, a pivotal epicenter for Chinese sweet pomelo production, this study elucidates the reverberations of Rural E-commerce Environment Development on Orchard Expansion through the lens of Tele-coupling. In doing so, it unveils the nuanced tapestry of the human-land coupling associations latent within the evolutionary trajectory of the agricultural system amidst the blossoming information society. The findings underscore a symbiotic relationship between the augmentation of orchard acreage and the burgeoning rural e-commerce landscape, effectively propelling the economic prosperity of the agricultural system. Moreover, a tele-coupling phenomenon has emerged, underscoring the intricate web of interconnections binding the maturation of the rural e-commerce ecosystem with the proliferation of orchards. The research illuminates that the transformation of land utilization, imbricated within the agricultural system, manifests as a distinctive form of tele-coupling intricately woven into the fabric of urbanization and information technology advancements. Consequently, adopting a comprehensive theoretical perspective and amalgamating disparate domains across distinct geographic realms becomes imperative for discerning the intricate nuances of the human-land coupling nexus within these multifaceted, open systems.

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“…It is well known that the predominant extracellular peptidases of bacterial origin are mainly alkaline metallopeptidases (Apr), neutral metallopeptidases (Npr) and serine peptidases (Sub) (Lori et al 2020 ). The apr , npr and sub genes, which encode these extracellular peptidases that catalyze the proteolytic process, have been extensively used as marker genes to study the protease-encoding microbial communities (Pereg and McMillan 2020 ). For example, Sakurai et al ( 2007 ) studied the diversity of npr after application of organic and inorganic fertilizer and they postulated that the proteolytic bacterial community composition may primarily contribute to control the overall soil protease activity.…”

Section: Introductionmentioning

confidence: 99%

Hyperthermophilic pretreatment composting can reduce ammonia emissions by controlling proteolytic bacterial community and the physicochemical properties

Huang¹,

Chen²,

Huang³

et al. 2023

Bioresour. Bioprocess.

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Proteolysis is the rate-limiting step in the mineralization of organic nitrogen into ammonium (NH4+) and thereby the ammonia (NH3) released during the composting. However, the dynamics of bacterial proteolytic communities related to NH3 emissions during the composting systems are mostly unknown. This study aimed to examine and compare the effects of hyperthermophilic pretreatment composting (HPC) and traditional composting (TC) methods on (i) the difference of NH3 loss and nitrogenous compounds; (ii) the dynamics of the proteolytic bacterial community involved in the proteolysis and (iii) the correlation between the proteolytic bacterial community, biophysiochemical characteristics and NH3 loss. Results revealed that the HPC decreased NH3 loss by 42% as compared to TC during 60-day composting period. This was accompanied with an inhibitory effect on protease activity in the HPC where the relative abundances of the proteolytic bacteria (Bacillus megaterium and Staphylococcus cohnii) were reduced significantly as compared to TC. Partial least-squares path modeling suggested that various physicochemical properties such as higher temperature as well as lower C/N ratio during composting played a dominant role in affecting the abundance of proteolytic bacteria, which may have been an important factor contributing to the lower NH3 loss in HPC. All these findings lead us to conclude that the HPC can significantly reduce NH3 loss by inhibiting the proteolytic bacteria and protease activity responsible for NH3 release. Graphical Abstract

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Nitrogen-Cycling Communities in Organically Amended Versus Conventionally Managed Agricultural Soil

Cited by 3 publications

References 140 publications

Degradation of Complex Carbon Sources in Organic Fertilizers Facilitates Nitrogen Fixation

Degradation of Complex Carbon Sources in Organic Fertilizers Facilitates Nitrogen Fixation

The Impact of Rural E-Commerce Environment Development on Orchard Expansion from the Perspective of Tele-Coupling: The Case of Pinghe County in Southeast China

Hyperthermophilic pretreatment composting can reduce ammonia emissions by controlling proteolytic bacterial community and the physicochemical properties

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