Effects of reducing chemical fertilizer combined with organic amendments on ammonia-oxidizing bacteria and archaea communities in a low-fertility red paddy field

Yang, Dan; Xiao, Xun; He, Na; Zhu, Wenshuai; Liu, Mingda; GuangHui, Xie

doi:10.1007/s11356-020-09120-5

Cited by 21 publications

(5 citation statements)

References 49 publications

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“…The value of soil pH in CK treatment was 7.84 which was higher than that in the raw biogas slurry (7.65), as a result there observed a decline of soil pH in CBS and BS treatments. Similar results were also observed in early studies (Zhang et al, 2016;Yang et al, 2020;. Thus, the substitution of biogas slurry for chemical fertilizer at a proper ratio (50% in the present study) effectively improved apple plant growth and soil nutrients.…”

Section: Discussionsupporting

confidence: 92%

Changes in soil bacterial community and functions by substituting chemical fertilizer with biogas slurry in an apple orchard

Zhang

Shao

et al. 2022

Front. Plant Sci.

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Growing concerns about the negative environmental effects of excessive chemical fertilizer input in fruit production have resulted in many attempts looking for adequate substitution. Biogas slurry as a representative organic fertilizer has the potential to replace chemical fertilizer for improvement of sustainability. However, it is still poorly known how biogas slurry applications may affect the composition of soil microbiome. Here, we investigated different substitution rates of chemical fertilizer with biogas slurry treatment (the control with no fertilizer and biogas slurry, CK; 100% chemical fertilizer, CF; biogas slurry replacing 50% of chemical fertilizer, CBS; and biogas slurry replacing 100% of chemical fertilizer, BS) in an apple orchard. Soil bacterial community and functional structure among treatments were determined using Illumina sequencing technology coupled with Functional Annotation of Prokaryotic Taxonomy (FAPROTAX) analysis. Leaf nutrient contents, apple fruit and soil parameters were used to assess plant and soil quality. Results showed that most of fruit parameters and soil properties were significantly varied in the four treatments. CBS treatment increased the contents of soil organic matter, alkali nitrogen and available potassium average by 49.8%, 40.7% and 27.9%, respectively. Treatments with biogas slurry application increased the single fruit weight, fresh weight, and dry weight of apple fruit average by 15.6%, 18.8% and 17.8, respectively. Soil bacterial community dominance and composition were significantly influenced by substituting of chemical fertilizer with biogas slurry. Biogas slurry application enhanced the relative abundance of some beneficial taxa (e.g. Acidobacteria Gp5 and Gp7, Parasegetibacter) and functional groups related to carbon and nitrogen cycling such as chemoheterotrophy, cellulolysis, and nitrogen fixation. Soil available phosphorus and potassium, pH and electrical conductivity were identified having a high potential for regulating soil bacterial specific taxa and functional groups. This study showed that the proper ratio application (50%: 50%) of biogas slurry with chemical fertilizer could regulate soil bacterial composition and functional structure via changes in soil nutrients. The variations of bacterial community could potentially take significant ecological roles in maintaining apple plant growth, soil fertility and functionality.

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Section: Discussionsupporting

confidence: 92%

Changes in soil bacterial community and functions by substituting chemical fertilizer with biogas slurry in an apple orchard

Zhang

Shao

et al. 2022

Front. Plant Sci.

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“…Environmental factors, such as temperature, pH, moisture, C/N ratio, nitrate concentration, and total nitrogen, were considered as driving forces affecting the AOA or AOB gene abundance [22,23]. Previous studies demonstrated that soil pH was closely correlated with AOA and AOB gene abundances [16,55]. However, there was no significant correlation between the abundance of AOA and AOB genes and soil pH in this study.…”

Section: Discussioncontrasting

confidence: 55%

Snow Exclusion Does Not Affect Soil Ammonia-Oxidizing Bacteria and Archaea Communities

Zhang

You

Liu

et al. 2022

Forests

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Soil ammonia-oxidizing microorganisms play important roles in nitrogen (N) cycling in cold ecosystems, but how changes in snow cover will affect their distribution and associated functional characteristics remains unclear. A snow manipulation experiment was conducted to explore the effects of snow exclusion on soil ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB) communities and functional characteristics in a spruce forest in the eastern Tibet Plateau. Results showed that the amoA gene abundance and community composition of AOA and AOB did not differ between snow regimes but varied among winter periods. AOA and AOB gene abundances showed a decreasing trend during the snow cover melting period. During the deep snow cover period, Thaumarchaeota and Crenarchaeota in the AOA community decreased significantly, while Proteobacteria and Nitrosospira in the AOB community increased significantly. The main factors affecting the changes in AOA and AOB community diversity and composition were soil MBN, nitrate nitrogen, and temperature, while AOA and AOB community diversity and composition were also significantly correlated with soil enzyme activities related to N cycling. These results recommend that the season-driven variations strongly affected soil ammonia-oxidizing community and functional characteristics more than momentary snow cover change. Such findings offer new insights into how soil N-cycling processes would respond to reduced snowfall in high-altitude regions.

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“…For example, increased soil organic matter (SOM) and soil water content (SWC) under reduced tillage and winter cover cropping can create nutrient-rich anaerobic microsites that favor microbial denitrification (10,11). N limitation caused by reduced N fertilization may decrease the population size of ammonia-oxidizing bacteria (AOB) (12) but promote the activity of diazotrophs for N fixation (13).…”

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confidence: 99%

Soil Health Management Enhances Microbial Nitrogen Cycling Capacity and Activity

Jin

Konkel

et al. 2021

mSphere

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Soil microbial transformations of nitrogen (N) can be affected by soil health management practices. Here, we report in situ seasonal dynamics of the population size (gene copy abundances) and functional activity (transcript copy abundances) of five bacterial genes involved in soil N cycling (ammonia-oxidizing bacteria [AOB] amoA, nifH, nirK, nirS, and nosZ) in a long-term continuous cotton production system under different management practices (cover crops, tillage, and inorganic N fertilization). Hairy vetch (Vicia villosa Roth), a leguminous cover crop, most effectively promoted the expression of N cycle genes, which persisted after cover crop termination throughout the growing season. Moreover, we observed similarly high or even higher N cycle gene transcript abundances under vetch with no fertilizer as no cover crop with N fertilization throughout the cover crop peak and cotton growing seasons (April, May, and October). Further, both the gene and transcript abundances of amoA and nosZ were positively correlated to soil nitrous oxide (N2O) emissions. We also found that the abundances of amoA genes and transcripts both positively correlated to field and incubated net nitrification rates. Together, our results revealed relationships between microbial functional capacity and activity and in situ soil N transformations under different agricultural seasons and soil management practices. IMPORTANCE Conservation agriculture practices that promote soil health have distinct and lasting effects on microbial populations involved with soil nitrogen (N) cycling. In particular, using a leguminous winter cover crop (hairy vetch) promoted the expression of key functional genes involved in soil N cycling, equaling or exceeding the effects of inorganic N fertilizer. Hairy vetch also left a legacy on soil nutrient capacity by promoting the continued activity of N cycling microbes after cover crop termination and into the main growing season. By examining both genes and transcripts involved in soil N cycling, we showed different responses of functional capacity (i.e., gene abundances) and functional activity (i.e., transcript abundances) to agricultural seasons and management practices, adding to our understanding of the effects of soil health management practices on microbial ecology.

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Effects of reducing chemical fertilizer combined with organic amendments on ammonia-oxidizing bacteria and archaea communities in a low-fertility red paddy field

Cited by 21 publications

References 49 publications

Changes in soil bacterial community and functions by substituting chemical fertilizer with biogas slurry in an apple orchard

Changes in soil bacterial community and functions by substituting chemical fertilizer with biogas slurry in an apple orchard

Snow Exclusion Does Not Affect Soil Ammonia-Oxidizing Bacteria and Archaea Communities

Soil Health Management Enhances Microbial Nitrogen Cycling Capacity and Activity

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