Reforestation accelerates soil organic carbon accumulation: Evidence from microbial biomarkers

Shao, Ping; Liang, Chao; Lynch, Laurel; Xie, Hongfeng; Bao, XH

doi:10.1016/j.soilbio.2019.01.012

Cited by 130 publications

(60 citation statements)

References 65 publications

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“…The GfG program, which was initiated by China to alleviate poverty and hasten rural development, has changed soil properties notably. For example, Shao et al (2019) found that afforestation changed soil properties and affected soil quality (Zhang et al, 2019). The GfG also promoted soil carbon and nitrogen accumulation in secondary forests in the subtropical karst region, which were relative to soil depth (Hu et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Effect of Different Grain for Green Approaches on Soil Bacterial Community in a Karst Region

Chen

Peng

et al. 2020

Front. Microbiol.

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Soil bacteria participate in nutrient cycling above and below ground to promote ecosystem stability and health. However, the relationship of soil bacteria and environmental factors following the Grain for Green (GfG) program remains poorly understood in southwest China. Soil samples were collected from seven Grain for Green sites that had been revegetated for 15 years. Four of these sites were afforested with a different tree species: Zenia insignis (ZI), Toona sinensis (TS), Castanea mollissima (CM), and Citrus reticulate (CR). One site was revegetated with Zenia insignis and Guimu-1 elephant grass (ZG), and one with only Guimu-1 elephant grass (GM). The remaining site, abandoned cropland (AC), was left to regenerate naturally. Here, we used Illumina sequencing of 16S rRNA genes to explore how the Grain for Green project affected soil bacterial community. We found that Actinobacteria, Proteobacteria, Chloroflexi, and Acidobacteria were the dominant phyla in these soils. The dominant genera at each revegetation site were also different. The CM, ZI, TS, and AC sites were dominated by Micromonospora, ZG was dominated by Streptomyces, and CR and GM were dominated by Subgroup 6. The bacterial structure was most similar in AC and TS. Correlation analysis showed that the ratio of C:P had positive effects on KD4-96, Intrasporangiaceae, and Gaiella. The ratio of soil N:P was significantly positively correlated with Cupriavidus and Kribbella. The combination of planting Zenia insignis and Guimu-1 elephant grass had the best edaphic benefits, and the approach of planting Citrus reticulate and Toona sinensis needs to be improved. Redundancy analysis (RDA) revealed that plant Simpson index, and soil N:P contributed to 16 and 15.7% of the total variations in the soil bacterial community composition, respectively. Our results suggested that plant diversity (Simpson index) and soil stoichiometric ratio (N:P) were the important factors affecting the bacterial community, and phosphorus was the limiting factor of the bacterial community in the Grain for Green karst region. In the future, revegetation should be accompanied with phosphorus fertilizer and polycultures should be considered.

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Section: Introductionmentioning

confidence: 99%

Effect of Different Grain for Green Approaches on Soil Bacterial Community in a Karst Region

Chen

Peng

et al. 2020

Front. Microbiol.

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“…Consequently, changes in forest structure and management practices likely lead to the alteration, not only of input rates and organic matter decomposability, but also of soil moisture and temperature regimes [12,13]. The adaptation of soil microbial abundance, community composition, and activity following these changes can shift the soil biogeochemical cycling processes regulated by microorganisms [14,15], eventually affecting the contribution of microbial residue C to the soil C pool [16].…”

Section: Introductionmentioning

confidence: 99%

Conversion of Natural Evergreen Broadleaved Forests Decreases Soil Organic Carbon but Increases the Relative Contribution of Microbial Residue in Subtropical China

Yang

Chen

et al. 2019

Forests

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It has been recognized that land use change affects soil organic carbon (SOC) dynamics and the associated microbial turnover. However, the contribution of microbial residue to SOC storage remains largely unknown in land use change processes. To this end, we adopted a “space for time” approach to examine the dynamics of SOC and amino sugars, which was a biomarker of microbial residue C, in different natural forest conversions. Three typical converted forests were selected: an assisted natural regeneration (ANR) and two coniferous plantations of Cunninghamia lanceolata (Lamb.) Hook (Chinese fir) and Pinus massoniana Lamb. (pine) each. All of these were developed at the same time after the harvest of an old natural forest and they were used to evaluate the effects of forest conversions with contrasting anthropogenic disturbance on SOC and microbial residue C, along with the natural forest. Natural forest conversion led to an approximately 42% decrease in SOC for ANR with low anthropogenic disturbance, 60% for the Chinese fir plantation, and 64% for the pine plantation. In contrast, the natural forest conversion led to a 32% decrease in the total amino sugars (TAS) for ANR, 43% for the Chinese fir plantation, and 54% for the pine plantation at a soil depth of 0–10 cm. The ratios of TAS to SOC were significantly increased following natural forest conversion, with the highest ratio being observed in the Chinese fir plantation, whereas the ratios of glucosamine to muramic acid (GluN/MurA) were significantly decreased in the two plantations, but not in ANR. The contents of SOC, individual amino sugar, or TAS, and GluN/MurA ratios were consistently higher at a soil depth of 0–10 cm than at 10–20 cm for all of the experimental forests. Redundancy analysis showed that microbial residue C was significantly correlated with SOC, and both were positively correlated with fine root biomass, annual litterfall, and soil available phosphorus. Taken together, our findings demonstrated that microbial residue C accumulation varied with SOC and litter input, and played a more important role in SOC storage following forest conversion to plantations with higher anthropogenic disturbance.

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“…1). Moreover, air-dried soils ground to different mesh sizes were commonly used in the previous studies (Indorf et al, 2011;Liu et al, 2019;Shao et al, 2019), we therefore investigated the influence of grinding sizes of airdried soils on amino sugar extraction. In contrary to the studies claiming that amino sugars were mainly concentrated in finer fractions of soils (Amelung et al, 2002), we did not observe a similar trend of the effect of grinding on the amino sugar extraction.…”

Section: Discussionmentioning

confidence: 99%

“…However, there is still lack of consensus about the pretreatment of soil samples before hydrolysis. In previous studies, various sample pretreatments including field-moist (Murugan et al, 2019), freeze-dried (Moritz et al, 2008), and air-dried soils ground to different particle sizes have been used for amino sugar extraction (Indorf et al, 2011;Liu et al, 2019;Shao et al, 2019). However, few studies evaluated the potential impacts of sample pretreatments on the extraction and determination of amino sugars in soils.…”

Section: Introductionmentioning

confidence: 99%

Influences of sample storage and grinding on the extraction of soil amino sugars

et al. 2020

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Reforestation accelerates soil organic carbon accumulation: Evidence from microbial biomarkers

Cited by 130 publications

References 65 publications

Effect of Different Grain for Green Approaches on Soil Bacterial Community in a Karst Region

Effect of Different Grain for Green Approaches on Soil Bacterial Community in a Karst Region

Conversion of Natural Evergreen Broadleaved Forests Decreases Soil Organic Carbon but Increases the Relative Contribution of Microbial Residue in Subtropical China

Influences of sample storage and grinding on the extraction of soil amino sugars

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