Nutrient Mineralization and Soil Biology as Influenced by Temperature and Fertilizer Management Practices

Naher, Umme Aminun; Sarker, Imran Ullah; Jahan, Afsana; Maniruzzaman, Md.; Choudhury, A. K.; Kalra, Navin; Biswas, Jatish Chandra

doi:10.17576/jsm-2019-4804-05

Cited by 11 publications

(4 citation statements)

References 37 publications

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“…This traditional farmland management practice of fertilizer application resulted in the highest TP and AK contents under FL in the present study, which was significantly higher than that under afforestation lands. This was consistent with the findings of Naher et al (2019) in Southeast Bangladesh. Compared with the crops under FL, the trees in LAT and ORO required more TP and AK to support their growth (Deng et al, 2017; Guo et al, 2020), which was also an important reason resulted in the lower TP and AK contents under afforestation lands.…”

Section: Discussionsupporting

confidence: 94%

Afforestation alters soil microbial community composition and reduces microbial network complexity in a karst region of Southwest China

Yu,

Tang,

Sun

et al. 2024

Land Degrad Dev

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Soil microbial community plays important roles in altering ecological processes and biogeochemical cycles in ecosystems. However, little is known about how afforestation influences the diversity, composition, and ecological network of soil microbial community in karst regions. In this study, soil samples were collected from one farmland (FL) and three afforestation lands including one bamboo forest (BA), one landscape tree planting forest (LAT), and one orange orchard (ORO) in a karst region of Southwest China. The bacterial and fungal communities were characterized using the high‐throughput sequencing approach, and soil properties including soil organic carbon, pH, soil water content, and soil total and available nutrient contents were measured under different land use treatments. Results showed that conversion from FL to BA and LAT significantly reduced the Shannon diversity of bacterial community. At the phylum level (top 10), genus level (top 30), and operational taxonomic units (OTUs) level, afforestation from FL resulted in significant changes in nine phyla, 24 genera, and 31.32% OTUs of bacterial community, and in three phyla, 13 genera, and 11.62% OTUs of fungal community. The number of nodes, number of negative edges, connectivity, average degree, and relative modularity of the microbial network under afforestation lands decreased by 9.33%–18.66%, 47.98%–72.75%, 0.45%–5.93%, 14.73%–22.29%, and 6.46%–23.50%, respectively, compared with FL. The soil organic carbon, total potassium and total phosphorus were identified as the key soil properties affecting the microbial community. Compared with LAT and ORO, the changes in bacterial and fungal communities under BA were more obvious because of the higher contents in soil organic carbon (13.48%) and total potassium (27.18%). In conclusion, afforestation significantly changed compositions and ecological network complexity of soil microbial community in karst regions, and conversion from FL to BA had stronger influences on the changes of soil microbial community than other afforestation lands in Southwest China. These findings provide the context necessary to evaluate the responses of soil microbial community to land use changes in karst regions.

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Section: Discussionsupporting

confidence: 94%

Afforestation alters soil microbial community composition and reduces microbial network complexity in a karst region of Southwest China

Yu,

Tang,

Sun

et al. 2024

Land Degrad Dev

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“…According to Lai et al (2022) [41], toxic metal pollution produces serious stress on the reproduction and growth of microorganisms in the soil, and the results of microbial abundance showed that the total microbial biomass in toxic metal-contaminated soil was 42.86%, 53.33%, and 44.93% lower than those in non-contaminated soil. Naher et al (2021) [42] find that a higher number of total beneficial bacteria is associated with the highest score of soil quality index, with high OM, moderate pH value, and higher concentration of nutrients. Also, Duarah et al (2011) [43] reported that NPK Fertilization treatments showed a negative effect on the PSBs population, on the other hand, Jana et al (2001) [44] noted that the abundance of PSBs is closely related to C-N and N-P application.…”

Section: Plos Onementioning

confidence: 99%

Phosphate solubilizing bacteria from soils with varying environmental conditions: Occurrence and function

Janati,

Bouabid,

Mikou

et al. 2023

PLoS ONE

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Phosphate solubilizing bacteria (PSB) is an advantageous way to supply phosphate (P) to plants. The Mediterranean climate of Morocco, especially the low-lying areas, is semi-arid with nutrient-depleted soils in which small-scale, low-income farmers dominate without access to expensive inorganic fertilizers. However, there is not a wide range of PSBs suitable for various agroecological situations. Furthermore, our understanding of the soil and climatic variables that influence their development is limited. This study aims to examine the impacts of specific environmental factors, such as climate and soil, on the abundance, potential, and diversity of PSBs in four agricultural regions of Morocco. To assess the possible impact of these factors on the P solubilization capacity of PSBs and plant growth-promoting (PGP) traits, we analyzed the soil and climate of each sample studied. Similarly, we tested the P solubilization efficiency of the isolates. The bacteria were isolated in a National Botanical Research Institute’s phosphate (NBRIP) agar medium. A total of 51 PSBs were studied in this work. The P-solubilization average of Rock P (RP) and Tricalcium P (TCP) of all strains that were isolated from each of the four regions ranged from 18.69 mg.L-1 to 40.43 mg.L-1 and from 71.71 mg.L-1 to 94.54 mg.L-1, respectively. The PGP traits of the isolated strains are positively correlated with the PSBs abundance and the sample characteristics (soil and climate). The morphological and biochemical characteristics of the strain allowed us to identify around nine different bacterial genera, including Bacillus, Pseudomonas, and Rhizobium. The findings showed that bacterial communities, density, and potency are closely correlated to various edapho-climatic conditions such as temperature, precipitation, soil nutrient status, and soil texture. These findings could be used to improve an effective plant-PSBs system and increase agricultural output by taking into account their specific ecological traits and plant growth mechanisms.

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“…Soil microbial activities are highly reactive to modulation of soil temperature ( Naher et al, 2019 ). Generally, microbial growth and activities are increased under high temperature conditions at a typical temperature range ( Heinze et al, 2016 ).…”

Section: Factors Affecting the Activities Of Ammonia Oxidizersmentioning

confidence: 99%

Improving Nitrogen Use Efficiency in Aerobic Rice Based on Insights Into the Ecophysiology of Archaeal and Bacterial Ammonia Oxidizers

Farooq

Uzair²,

Maqbool

et al. 2022

Front. Plant Sci.

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The abundance and structural composition of nitrogen (N) transformation-related microbial communities under certain environmental conditions provide sufficient information about N cycle under different soil conditions. This study aims to explore the major challenge of low N use efficiency (NUE) and N dynamics in aerobic rice systems and reveal the agronomic-adjustive measures to increase NUE through insights into the ecophysiology of ammonia oxidizers. Water-saving practices, like alternate wetting and drying (AWD), dry direct seeded rice (DDSR), wet direct seeding, and saturated soil culture (SSC), have been evaluated in lowland rice; however, only few studies have been conducted on N dynamics in aerobic rice systems. Biological ammonia oxidation is majorly conducted by two types of microorganisms, ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB). This review focuses on how diversified are ammonia oxidizers (AOA and AOB), whose factors affect their activities and abundance under different soil conditions. It summarizes findings on pathways of N cycle, rationalize recent research on ammonia oxidizers in N-cycle, and thereby suggests adjustive agronomic measures to reduce N losses. This review also suggests that variations in soil properties significantly impact the structural composition and abundance of ammonia oxidizers. Nitrification inhibitors (NIs) especially nitrapyrin, reduce the nitrification rate and inhibit the abundance of bacterial amoA without impacting archaeal amoA. In contrast, some NIs confine the hydrolysis of synthetic N and, therefore, keep low NH4+-N concentrations that exhibit no or very slight impact on ammonia oxidizers. Variations in soil properties are more influential in the community structure and abundance of ammonia oxidizers than application of synthetic N fertilizers and NIs. Biological nitrification inhibitors (BNIs) are natural bioactive compounds released from roots of certain plant species, such as sorghum, and could be commercialized to suppress the capacity of nitrifying soil microbes. Mixed application of synthetic and organic N fertilizers enhances NUE and plant N-uptake by reducing ammonia N losses. High salt concentration promotes community abundance while limiting the diversity of AOB and vice versa for AOA, whereas AOA have lower rate for potential nitrification than AOB, and denitrification accounts for higher N2 production. Archaeal abundance, diversity, and structural composition change along an elevation gradient and mainly depend on various soil factors, such as soil saturation, availability of NH4+, and organic matter contents. Microbial abundance and structural analyses revealed that the structural composition of AOA was not highly responsive to changes in soil conditions or N amendment. Further studies are suggested to cultivate AOA and AOB in controlled-environment experiments to understand the mechanisms of AOA and AOB under different conditions. Together, this evaluation will better facilitate the projections and interpretations of ammonia oxidizer community structural composition with provision of a strong basis to establish robust testable hypotheses on the competitiveness between AOB and AOA. Moreover, after this evaluation, managing soils agronomically for potential utilization of metabolic functions of ammonia oxidizers would be easier.

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Nutrient Mineralization and Soil Biology as Influenced by Temperature and Fertilizer Management Practices

Cited by 11 publications

References 37 publications

Afforestation alters soil microbial community composition and reduces microbial network complexity in a karst region of Southwest China

Afforestation alters soil microbial community composition and reduces microbial network complexity in a karst region of Southwest China

Phosphate solubilizing bacteria from soils with varying environmental conditions: Occurrence and function

Improving Nitrogen Use Efficiency in Aerobic Rice Based on Insights Into the Ecophysiology of Archaeal and Bacterial Ammonia Oxidizers

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