Diazotroph community structure and abundance in wheat–fallow and wheat–pea crop rotations

Reardon, Catherine L.; Gollany, Hero T.; Wuest, Stewart B.

doi:10.1016/j.soilbio.2013.10.038

Cited by 77 publications

(64 citation statements)

References 36 publications

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“…Thus, a concurrent increase in the abundance of these two microorganisms is important to vegetation restoration in karst regions. Additionally, compared with results from other ecosystems (Reardon et al 2014), nifH gene abundance (Fig. 1) was slightly higher in our study site, lending credence to the suggestion that nitrogenfixing bacteria contribute more to nitrogen input in karst ecosystems.…”

Section: Discussionsupporting

confidence: 83%

Effect of vegetation types on soil arbuscular mycorrhizal fungi and nitrogen-fixing bacterial communities in a karst region

Liang

Pan

et al. 2016

Environ Sci Pollut Res

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Arbuscular mycorrhizal (AM) fungi and nitrogen-fixing bacteria play important roles in plant growth and recovery in degraded ecosystems. The desertification in karst regions has become more severe in recent decades. Evaluation of the fungal and bacterial diversity of such regions during vegetation restoration is required for effective protection and restoration in these regions. Therefore, we analyzed relationships among AM fungi and nitrogen-fixing bacteria abundances, plant species diversity, and soil properties in four typical ecosystems of vegetation restoration (tussock (TK), shrub (SB), secondary forest (SF), and primary forest (PF)) in a karst region of southwest China. Abundance of AM fungi and nitrogen-fixing bacteria, plant species diversity, and soil nutrient levels increased from the tussock to the primary forest. The AM fungus, nitrogen-fixing bacterium, and plant community composition differed significantly between vegetation types (p < 0.05). Plant richness and pH were linked to the community composition of fungi and nitrogen-fixing bacteria, respectively. Available phosphorus, total nitrogen, and soil organic carbon levels and plant richness were positively correlated with the abundance of AM fungi and nitrogen-fixing bacteria (p < 0.05). The results suggested that abundance of AM fungi and nitrogen-fixing bacteria increased from the tussock to the primary forest and highlight the essentiality of these communities for vegetation restoration.

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Section: Discussionsupporting

confidence: 83%

Effect of vegetation types on soil arbuscular mycorrhizal fungi and nitrogen-fixing bacterial communities in a karst region

Liang

Pan

et al. 2016

Environ Sci Pollut Res

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“…This is a popular and effective method to analyze specific microbial groups at the molecular level [50]. The significance of crop rotation for the development of agro-ecological sustainability has been well documented in terms of soil structure maintenance, soil fertility improvement, and total soil microbial diversity richness [51][52][53]. Thus, it is important to explore the effects of the garlic/cucumber crop rotation system on microbial diversity or richness under long-term field conditions.…”

Section: Discussionmentioning

confidence: 99%

Dynamics of a Soil Fungal Community in a Three-Year Green Garlic/Cucumber Crop Rotation System in Northwest China

2018

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Abstract:A decreased soil biological environment in terms of an unstable microbial population and diversity index is primarily caused by intensive continuous cropping systems. In this study, a crop rotation system was established to evaluate the soil fungal diversity using a pyrosequencing-based analysis during three successive growing seasons (2013, 2014, and 2015) under a field pot investigation. We found that overall green garlic/cucumber rotational effects increased cucumber productivity under these growing practices. Analysis of fungal communities in rhizosphere soils by high-throughput pyrosequencing showed that the estimated treatment effects were more obvious during the three-year trials, and OTU richness was much higher than the control in cucumber-planted soils. The relative frequencies of fungal diversity showed variable responses before and after rotation practices, and mainly α-diversity of fungi increased in garlic planted soil and again decreased after cucumber planted soil in each year. The phylogenetic classification illustrated that the fungal communities were dominated by the taxa Ascomycota, Basidiomycota, Chytridiomycota, Glomeromycota, and Zygomycota across all samples. Particularly, the relative abundance of the taxon Ascomycota was largely and predominantly enriched with the increasing number of garlic bulbs during the three years. Moreover, the majority of abundant taxa positively correlated with available P and K contents, while being highly negatively correlated with soil pH, EC, and SOC. These results indicate that garlic-cucumber-based crop rotations induce fungal richness and diversity and promote the sustainability of agricultural ecosystems, thus enhancing crop growth and production.

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“…They observed that plant species and biomass retention influenced the structure of the soil microbial community (Hsu and Buckley, 2009;Mao et al, 2011). Yin et al (2010) reported that soil microbial communities are affected by agricultural practices due to highly complex interactions and that community structure variability was also greatly influenced by fertilization (Poly et al, 2001;Reardon et al, 2014). In this study, 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 crop rotations were conducted under corporate practices in which crop biomass was partly retained, and fertilization varied with crop.…”

Section: Discussionmentioning

confidence: 99%

“…Conventional investigations into the soil microbial community are based on isolation cultures or 16 S/18 S rRNA gene whole or specific community fingerprinting techniques such as real-time PCR, terminal restriction fragment length polymorphism (TRFLP) (Hilton et al, 2013;Reardon et al, 2014), and denaturing gradient gel electrophoresis (DGGE). However, these methods can only detect dominant microbial groups and thus do not provide deep community coverage and resolution (Li et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Pineapple–banana rotation reduced the amount of Fusarium oxysporum more than maize–banana rotation mainly through modulating fungal communities

Wang

Ruan

et al. 2015

Soil Biology and Biochemistry

102

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Diazotroph community structure and abundance in wheat–fallow and wheat–pea crop rotations

Cited by 77 publications

References 36 publications

Effect of vegetation types on soil arbuscular mycorrhizal fungi and nitrogen-fixing bacterial communities in a karst region

Effect of vegetation types on soil arbuscular mycorrhizal fungi and nitrogen-fixing bacterial communities in a karst region

Dynamics of a Soil Fungal Community in a Three-Year Green Garlic/Cucumber Crop Rotation System in Northwest China

Pineapple–banana rotation reduced the amount of Fusarium oxysporum more than maize–banana rotation mainly through modulating fungal communities

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