Dynamics of soil aggregate‐related <scp>C‐N‐P</scp> stoichiometric characteristics with stand age and soil depth in Chinese fir plantations

Tang, Lili; Wang, Shengqiang

doi:10.1002/ldr.4217

Cited by 29 publications

(23 citation statements)

References 62 publications

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“…Regardless of the stand type, there were significant differences in OC and TN contents associated with different aggregate sizes, which is shown in Table 2. In this research, OC and TN contents were mainly concentrated in microaggregates (Figure 3), conforming to the results by Mao et al (2021) and Tang and Wang (2022) that microaggregates have larger specific surface areas, causing the adsorption to nutrients to improve. Similarly, our findings detected that soil OC and TN contents with sized aggregates displayed a similar distribution pattern (Figure 4).…”

Section: Aggregate-associated Oc Tn and Tp Contentssupporting

confidence: 89%

“…Irrespective of the stand type, the average OC, TN and TP contents in the bulk soil were 18.95 g kg -1 , 1.10 g kg -1 , and 0.25 g kg -1 , respectively (Table 3), which were lower than the average soil OC (30.40 g kg -1 ), TN (2.21 g kg -1 ) and TP (0.20-1.10 g kg -1 ) contents in China (Tian et al, 2010). N is the common limiting element in C. lanceolata stands of Guangxi (Tang & Wang, 2022;Tong et al, 2020), while China has reached one of the highest N levels reported worldwide, especially in subtropical forests, which have caused increases in soil P loss and decreases in soil P availability (Wang et al, 2018). Soil P sources are relatively fixed (Xue et al, 2022).…”

Section: Aggregate-associated Oc Tn and Tp Contentsmentioning

confidence: 86%

“…In this study, compared with stand C, stands A and B showed an increase in MWD and GMD values (Table 4); thus, mixed stands had higher aggregate stability than pure stands, owing to the accumulation of large macroaggregates in their stands (Figure 2). Aggregate stability has a negative relation with soil bulk density and positive relation with total soil porosity (Liu et al, 2021;Tang & Wang., 2022). Notably, our study (Table 3) also indicated that compared to pure forest of Chinese fir (stand C), mixed Chinese fir forests (stands A and B) experienced significant declines in soil bulk density and increases in total soil porosity.…”

Section: Aggregate Distribution and Stabilitymentioning

confidence: 99%

“…Our past studies indicated that soil OC, TN, and TP contents and stocks, with their ratios, showed a marked decline as the soil layer deepened and with diverse ages of C. lanceolata plantations (Tang & Wang., 2022). Nevertheless, responses of soil aggregate stability and OC, TN, with TP stoichiometry to aggregate size and stand type in Chinese fir stands remain unclear.…”

Section: Introductionmentioning

confidence: 99%

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Variations in soil aggregate stability and aggregate-associated C-N-P stoichiometry by stand type in Chinese fir

Zhang

Jiang

et al. 2022

Preprint

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Research on the variations in soil aggregate stability and ecological stoichiometry at aggregate scales by stand type is of great significance to investigating the distribution, limitation, balance, and cycling of chemical elements. We measured the variations in soil aggregate stability, organic carbon (OC), total nitrogen (TN), and total phosphorus (TP) contents and stocks, in addition to their stoichiometric ratios by stand type (mixed stands of Chinese fir and Mytilaria laosensis and Chinese fir and Michelia macclurei and pure stand of Chinese fir), and aggregate size (<0.25, 0.25-1, 1-2, and >2 mm) in soil profile (0-20 and 20-40 cm) in Guangxi, China. Soil OC and TN contents and C/N, C/P and N/P ratios were more distributed in aggregates of <0.25 mm in the three stands; in contrast, soil OC, TN, and TP stocks were more obvious in aggregates of >2 mm. In comparison to the pure stand, the mixed stands showed significantly higher levels of soil aggregate stability, aggregate-associated OC and TN contents with stocks, TP content, C/N and C/P ratios. The C/N ratio, TN and TP contents, and TP stocks were the key factors in the stand types affecting the stability of soil aggregate changes. Hence, constructing mixed stands and applying appropriate amounts of N and P fertilization can improve soil fertility and promote degraded soil restoration.

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Section: Aggregate-associated Oc Tn and Tp Contentssupporting

confidence: 89%

Section: Aggregate-associated Oc Tn and Tp Contentsmentioning

confidence: 86%

Section: Aggregate Distribution and Stabilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Variations in soil aggregate stability and aggregate-associated C-N-P stoichiometry by stand type in Chinese fir

Zhang

Jiang

et al. 2022

Preprint

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“…Our past research has revealed that the composition and stabilization of soil aggregates change significantly during Chinese fir growth (Tang & Wang, 2022). Nevertheless, the changes of aggregate‐associated bacterial communities in soil over time are still not clear.…”

Section: Introductionmentioning

confidence: 99%

Soil bacterial community structure as affected by stand age in Chinese fir plantations: Insights at the aggregate scale

Liao

Wang

2022

Land Degrad Dev

Self Cite

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Exploring the variations of soil bacterial communities can contribute to the sustainability of Chinese fir plantations (CFPs). As the living environments of soil bacteria, soil aggregates significantly affect the diversity and composition regarding soil bacterial communities in CFPs. However, the distribution characteristics exhibited by soil bacteria at the aggregate scale are still not clear. In the present research, the diversity and composition regarding soil bacterial communities (using high-flux sequencing) in CFPs with diverse stand ages (3, 9, 17, and 26 years) were analyzed from the perspective of soil aggregates (>2, 1-2, 0.25-1, <0.25 mm) in Guangxi, China. According to the results, regardless of the aggregate size and the stand age, bacterial communities in soil were mainly composed of Proteobacteria, Chloroflexi, and Acidobacteria. During Chinese fir growth, the relative abundance (RA) of soil Proteobacteria first elevated and afterwards reduced, with the greatest level in the 17 years, while that of soil Chloroflexi exhibited an inverse trend. In addition, the RA of soil Acidobacteria increased over time. At the aggregate scale, the 17-year-old CFPs presented the greatest soil bacterial community diversity (based on the Chao 1 and Shannon indices). After 17 years, the destruction of coarse macroaggregates (>2 mm) could induce the reduction of soil bacterial community diversity, as coarse macroaggregates, taking up the majority of bulk soil, offered suitable environments for soil bacteria to survive and thrive. Moreover, soil organic C and total N concentrations and soil pH also significantly affected the diversity and composition regarding soil bacterial communities over time. Hence, the conservation of coarse macroaggregates after 17 years of Chinese fir growth is important to sustain the soil health as well as the bacterial community diversity in Guangxi, China.

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Attenuated asymmetry of above‐ versus belowground stoichiometry to a decadal nitrogen addition during stand development

Ning,

He,

et al. 2024

Ecology

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Deciphering the linkage between ecological stoichiometry and ecosystem functioning under anthropogenic nitrogen (N) deposition is critical for understanding the impact of afforestation on terrestrial carbon (C) sequestration. However, the specific changes in above‐ versus belowground stoichiometric asymmetry with stand age in response to long‐term N addition remain poorly understood. In this study, we investigated changes in stoichiometry following a decadal addition of three levels of N (control, no N addition; low N addition, 20 kg N ha−1 year−1; high N addition, 50 kg N ha−1 year−1) in young, intermediate, and mature stands in three temperate larch plantations (Larix principis‐rupprechtii) in North China. We found that low N addition had no impact on both above‐ (leaf and litter) and belowground (soil and microbe) stoichiometry. In contrast, high N addition resulted in significant asymmetry in above‐ versus belowground stoichiometry, which then diminished during stand development. Following 10 years of N inputs, the young and intermediate plantations transitioned from a state of relative N limitation to co‐limitation by both N and phosphorus (P), whereas the mature plantation continued to experience relative N limitation. Conversely, soil microorganisms exhibited relative P limitation in all three plantations. Broader niche differentiation (N limitation for trees, but P limitation for microorganisms) under long‐term N input may have been responsible for the faster attainment of stoichiometric homeostasis in mature plantations than in young plantations. Our findings provide stoichiometric‐based insight into the operating mechanisms of large C sinks in young forests, particularly above‐ versus belowground C stock asymmetry, and highlight the need to consider the role of flexible stoichiometry when forecasting future forest C sinks.

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Dynamics of soil aggregate‐related C‐N‐P stoichiometric characteristics with stand age and soil depth in Chinese fir plantations

Cited by 29 publications

References 62 publications

Variations in soil aggregate stability and aggregate-associated C-N-P stoichiometry by stand type in Chinese fir

Variations in soil aggregate stability and aggregate-associated C-N-P stoichiometry by stand type in Chinese fir

Soil bacterial community structure as affected by stand age in Chinese fir plantations: Insights at the aggregate scale

Attenuated asymmetry of above‐ versus belowground stoichiometry to a decadal nitrogen addition during stand development

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