Stoichiometric characteristics of medium‐ and micro‐elements (Ca, Mg, Fe, and Mn) in soil aggregates as affected by stand age in Chinese fir plantations

Wang, Shengqiang; Zhou, Pengyu; Luo, Bing; Ye, Shaoming

doi:10.1002/ldr.4439

Cited by 5 publications

(5 citation statements)

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“…The 2011–2018 monitoring data regarding the precipitation in Guangxi revealed that sulfurous acid rain constituted the precipitation in Guangxi, mainly observed in northern region and western region (Huang et al, 2019). In our research region (located in northern Guangxi) (Figure 1), frequent acid rain made soil exchangeable Ca and Mg to loss (Wang et al, 2022), and then resulted in soil acidification (Bini & Bresolin, 1998). Moreover, the rhizodeposition of substantial organic acids (like oxalate acid, lemon acid, and malic acid) around tree roots could elicit localized soil acidification, especially at the late stage of Chinese fir growth (Augusto et al, 1998).…”

Section: Discussionmentioning

confidence: 92%

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

Liao

Wang

2022

Land Degrad Dev

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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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Section: Discussionmentioning

confidence: 92%

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

Liao

Wang

2022

Land Degrad Dev

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“…According to the precipitation monitoring data from 2011 to 2018 in Guangxi, sulfurous acid rain was the primary type of acid rain, and it mainly occurred in northern and western Guangxi (Huang et al, 2019). The experimental area in this study is situated in northern Guangxi (Figure S1), where recurrent acid rain contributes to the depletion of soil exchangeable Ca 2+ and Mg 2+ , which leads to the intensification of soil acidification (Wang et al, 2022). Additionally, organic acids' (including malic acid, oxalate acid, and lemon acid) deposition around Chinese fir roots may also contribute to the rhizosphere soil acidification (Augusto et al, 1998).…”

Section: Discussionmentioning

confidence: 99%

Aggregate composition directly affects the characteristics of soil microbial and nematode communities in a chronosequence of Chinese fir plantations

Liao,

Ye,

Wang

2024

Land Degrad Dev

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Maintaining soil biological diversity is an effective approach in facilitating Chinese fir plantations' sustainable development. However, dynamic characteristics of soil microbial and nematode communities during Chinese fir planting remain unclear, particularly on the aggregate scales, which are the main sites of soil biological activity. Therefore, the research aims to explore how stand age (3, 9, 17, and 26 years) of Chinese fir plantations affects soil microbial biomass (including bacteria, fungi, and actinomycetes, based on the phospholipid fatty acid method), nematode abundances (including bacterivores, fungivores, plant parasites, and omnivores‐predators, based on the modified Baermann funnel method), and their diversity within aggregates of differing sizes (>2, 2–1, 1–0.25, and <0.25 mm). According to the findings, both aggregate size and stand age were major factors affecting soil microbes and nematodes in Chinese fir plantations. Specifically, soil microbial biomass (mainly bacteria), nematode abundances (except fungivores), and their diversity peaked within large macro‐aggregates (>2 mm), and the ranking order for stand ages was 17 > 9 ≈ 3 > 26 years. As the main fractions of soil aggregates in Chinese fir plantations, large macro‐aggregates had suitable internal environments for soil microbial propagation and nematode growth and mainly accumulated at 17 years, which caused the prosperity of soil microbes and nematodes at this stand age. Moreover, the partial least squares path model demonstrated that the influence of stand age on soil microbes and nematodes was indirect; but rather, the aggregate composition played a direct role in shaping their communities. Therefore, in order to maintain soil biological diversity, large macro‐aggregates should be protected during the growth of Chinese fir, especially at the late stage (from 17 to 26 years). Overall, these results could provide valuable insights into Chinese fir plantations' sustainable development.

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“…Aggregate composition and stability are critical for assessing soil structure, which in turn affects nutrient supply, storage, and erosion resistance (Fattet et al, 2011). Larger aggregates improve soil stability and pore structure, while an increase in microaggregates can elevate the risk of soil erosion (Zhang et al, 2008;Wang et al, 2022).…”

Section: Effects Of Mixed Forests On Soil Aggregate Stability and P D...mentioning

confidence: 99%

“…Consequently, these mixed forests showed improved soil quality metrics, such as higher MWD and GMD of aggregates (Al-Kaisi et al, 2014;Giumbelli et al, 2020) (Table 4). The physical and chemical attributes of soil structure and biological factors play a pivotal role in determining soil stability (Wang et al, 2022). In mixed Eucalyptus forests, increased plant diversity often supports a broader range of soil fauna and flora.…”

Section: Effects Of Mixed Forests On Soil Aggregate Stability and P D...mentioning

confidence: 99%

“…NaOH-Pi and NaOH-Po are primarily distributed in >2 mm and 1-2 mm aggregates (Figure 6) because they are easily precipitated or adsorbed by amorphous Al and Fe in the soil (Tiessen et al, 1984;Barrow, 2015). Studies report that Al3 + and Fe2 + in the soil are mainly distributed within these aggregates (Wang et al, 2022). Many studies have shown that mixed forests significantly improve soil nutrient conditions, including soil P content (Huang et al, 2013;He et al, 2023).…”

Section: Effects Of Mixed Forests On Soil Aggregate Stability and P D...mentioning

confidence: 99%

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Mixed Eucalyptus plantations in subtropical China enhance phosphorus accumulation and transformation in soil aggregates

Cui,

Yan,

Wang

et al. 2023

Front. For. Glob. Change

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IntroductionThe production of Eucalyptus, a principal economic tree genus in China, is faced with challenges related to soil phosphorus (P) limitations. In this study, we explore variations in phosphorus content, storage, and transformation in Eucalyptus forests. We hypothesize that mixed forests augment soil aggregate stability and P content and that microaggregates are pivotal in determining P differences between mixed and pure forests. Additionally, we posit that mixed forests foster P transformation, enhancing its efficacy in the soil. Current research on the distribution and transformation of soil total P (TP) and P fractions at the soil aggregate level is limited.MethodsIn this study, we selected soil from a Eucalyptus-Mytilaria laosensis Lecomte mixed forest, Eucalyptus-Erythrophleum fordii Oliv mixed forest, and pure Eucalyptus forest in Chongzuo County, Guangxi, China, as the research objects. Using a dry-sieving method, we divided the soil collected in situ from the 0–40 cm layer into aggregates of >2, 1–2, 0.25–1, and <0.25 mm particle sizes, measured the TP and P fractions (resin-extractable inorganic P, bicarbonate-extractable inorganic P, bicarbonate-extractable organic P, sodium hydroxide-extractable inorganic P, sodium hydroxide-extractable organic P, dilute hydrochloric acid-extractable P, concentrated hydrochloric acid extractable inorganic P, concentrated hydrochloric acid-extractable organic P and residue-P) in different aggregates, and used redundancy analysis and PLS SEM to reveal key factors affecting soil P accumulation and transformation.ResultsThe results showed that compared to pure Eucalyptus forests, mixed Eucalyptus forests significantly enhanced the stability of soil aggregates and the content and storage of phosphorus, especially the Eucalyptus-Mytilaria laosensis mixed forest. The content of total soil phosphorus and its fractions decreased with increasing aggregate particle size, while the opposite trend was observed for stored P, with aggregates <0.25 mm being the main fraction influencing soil phosphorus accumulation. The transformation process of P fractions was primarily constrained by dissolution rates, mineralization rates, biological activity, including the action of microbes, fungi, and plant–root interactions, and other factors.DiscussionMixed forests increased the transformation of phosphorus in soil aggregates, effectivel enhancing the availability of soil phosphorus. In summary, this study provides important evidence for the systematic management of subtropical artificia Eucalyptus forests and the sustainable utilization of soil resources.

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Stoichiometric characteristics of medium‐ and micro‐elements (Ca, Mg, Fe, and Mn) in soil aggregates as affected by stand age in Chinese fir plantations

Cited by 5 publications

References 53 publications

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

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

Aggregate composition directly affects the characteristics of soil microbial and nematode communities in a chronosequence of Chinese fir plantations

Mixed Eucalyptus plantations in subtropical China enhance phosphorus accumulation and transformation in soil aggregates

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