Soil erosion significantly reduces organic carbon and nitrogen mineralization in a simulated experiment

Qiu, Liping; Zhu, Hansong; Liu, Jiao; Yao, Yufei; Wang, Xiang; Rong, Guohua; Zhao, Xiaoning; Shao, Mingan; Wei, Xiaorong

doi:10.1016/j.agee.2020.107232

Cited by 47 publications

(21 citation statements)

References 71 publications

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“…The increase in soil nutrients could positively affect functionality because increased resource availability was beneficial to the metabolism and composition of microorganisms (Tiemann & Billings, 2011). Similar results were also reported that high soil multifunctionality is generally accompanied by high values of soil nutrients (Liang et al, 2017; Qiu et al, 2021). Finally, our study demonstrated that organic fertilizer substitution increased soil enzyme activities (Table 1), which are involved in the soil C‐ and N‐cycling (García‐Ruiz et al, 2008).…”

Section: Discussionsupporting

confidence: 86%

“…Consequently, it was not surprising to find that fertilization reduced the abundance of Acidobacteria in our study (Figure 2c; Table S2). Qiu et al (2021) also found that Acidobacteria are astricted by soil moisture, having a negative correlation with most soil nutrients, but a positive correlation with soil moisture. Regardless of biochar addition, the application of organic fertilizer increased the abundance of Proteobacteria when compared to synthetic fertilizer treatment (Figure 2c; Table S2).…”

Section: Discussionmentioning

confidence: 96%

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Microbial diversity and the abundance of keystone species drive the response of soil multifunctionality to organic substitution and biochar amendment in a tea plantation

Han

et al. 2022

GCB Bioenergy

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High nitrogen (N) fertilizer inputs accelerate soil acidification and degradation in tea plantations, thus posing a threat to soil microbial diversity, species composition, and ecosystem service functions. The effects of organic fertilizer and biochar applications on improving soil fertility have been extensively studied on cropland; however, little is known about their effectiveness in promoting soil multifunctionality on rapidly expanding acidic soils in tea plantations. In this study, we conducted a two‐year field experiment in a subtropical tea plantation to investigate the effects of organic fertilizer substitution and biochar amendment on soil microbial communities and multifunctionality. The results showed that soil multifunctionality was enhanced in plots amended with organic fertilizer and biochar. Soil multifunctionality was significantly and positively correlated with alpha‐diversity of bacteria but not fungi. We also found that organic fertilizer substitution and biochar amendment improved soil multifunctionality by altering the abundance of keystone species. The abundance of keystone species classified as module hubs in the bacterial co‐occurrence network contributed significantly and positively to soil multifunctionality. In contrast, the keystone species categorized as module hubs in the fungal co‐occurrence network negatively affected soil multifunctionality. Soil pH was a key driver of soil microbial community composition, indicating that the increase in soil pH under organic fertilizer and biochar amendment had a crucial role in biological processes. These results suggest that organic substitution and biochar amendment are beneficial in preventing soil degradation and maintaining soil multifunctionality in subtropical tea plantations.

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Section: Discussionsupporting

confidence: 86%

Section: Discussionmentioning

confidence: 96%

Microbial diversity and the abundance of keystone species drive the response of soil multifunctionality to organic substitution and biochar amendment in a tea plantation

Han

et al. 2022

GCB Bioenergy

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“…Our examination of two sites with contrasting soil texture, climate, and erosion history revealed a consistent erosioninduced decrease in soil biodiversity and functionality. It has been well established that soil erosion results in the deterioration of soil structure, the loss of nutrients, decreases in the availability of nutrients, reduced water availability and a decrease in soil functionality [8][9][10][11][12][13]70]. However, the impact of erosion on soil microbial communities has received less attention [43], and it was still unknown if erosion induced changes in soil microbial network complexity is linked to reduced soil multifunctionality.…”

Section: Erosion Reduces Microbial Diversity and Soil Multifunctionalitymentioning

confidence: 99%

Erosion reduces soil microbial diversity, network complexity and multifunctionality

et al. 2021

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While soil erosion drives land degradation, the impact of erosion on soil microbial communities and multiple soil functions remains unclear. This hinders our ability to assess the true impact of erosion on soil ecosystem services and our ability to restore eroded environments. Here we examined the effect of erosion on microbial communities at two sites with contrasting soil texture and climates. Eroded plots had lower microbial network complexity, fewer microbial taxa, and fewer associations among microbial taxa, relative to non-eroded plots. Soil erosion also shifted microbial community composition, with decreased relative abundances of dominant phyla such as Proteobacteria, Bacteroidetes, and Gemmatimonadetes. In contrast, erosion led to an increase in the relative abundances of some bacterial families involved in N cycling, such as Acetobacteraceae and Beijerinckiaceae. Changes in microbiota characteristics were strongly related with erosion-induced changes in soil multifunctionality. Together, these results demonstrate that soil erosion has a significant negative impact on soil microbial diversity and functionality.

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“…The declines in the SOC stock in the cultivated lands can thus lead to decreased grain production [6,9,44]. Soil erosion can significantly reduce the SOC content in soils [41] and has an adverse effect on land productivity by removing SOC and nutrients [12,42]. During water erosion processes, SOC can be carried away both in dissolved and particulate form.…”

Section: Discussionmentioning

confidence: 99%

Changes in Cultivated Land Area and Associated Soil and SOC Losses in Northeastern China: The Role of Land Use Policies

Fang

2021

IJERPH

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Land use policy is the driving factor influencing land use; however, little research has been conducted to identify the role of agricultural policy in influencing land cultivation and associated soil and soil organic carbon (SOC) losses. The aims of this study were to explore temporal changes in cultivated land, soil erosion, and SOC loss and to identify the role of land use policy. The present study was conducted using the revised universal soil loss equation by integrating remote sensing images from 1980, 1990, 2000, and 2017. The study found that cultivated land areas increased from 275.11 thousand km2 in 1980, to 300.03 thousand km2 in 2000, and to 344.16 thousand km2 in 2010, and then decreased by 326.94 thousand km2. The mean soil loss rates changed from 590.66 t·km−2·yr−1 in 1980 to 634.25 t·km−2·yr−1 in 2010, and then decreased to 495.66 t·km−2·yr−1 in 2017. Soil loss rate increased with increasing slope gradient. The changes in SOC loss rates demonstrated the same pattern as that of soil loss, with the largest loss rate of 728.27 kg·km−2·yr−1. These changes can be explained by changed land use policy and population growth. In future land use management, reasonable implementation of soil conservation measures should be undertaken to reduce soil and SOC losses in the black soil region of northeastern China.

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Soil erosion significantly reduces organic carbon and nitrogen mineralization in a simulated experiment

Cited by 47 publications

References 71 publications

Microbial diversity and the abundance of keystone species drive the response of soil multifunctionality to organic substitution and biochar amendment in a tea plantation

Microbial diversity and the abundance of keystone species drive the response of soil multifunctionality to organic substitution and biochar amendment in a tea plantation

Erosion reduces soil microbial diversity, network complexity and multifunctionality

Changes in Cultivated Land Area and Associated Soil and SOC Losses in Northeastern China: The Role of Land Use Policies

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