Spatial heterogeneity and ecological stoichiometry characteristics of soil carbon, nitrogen and phosphorus under different micro-geomorphology in karst mountains

Fei, 陈飞 Chen

doi:10.5846/stxb202110232994

Cited by 2 publications

(4 citation statements)

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“…Soil stoichiometry is a necessary indicator for determining soil nutrient cycling and provides a comprehensive nutrient framework on a global scale (Liu et al, 2016). In this study, the C:N, C:P, and N:P ratios in the surface soil were higher than those in the deeper soil layers, consistent with the findings of Wang et al (2022) [53][54][55][56][57][58].…”

Section: Characteristics Of Soil Nutrients and Their Ecological Stoic...supporting

confidence: 91%

“…This indicates that in the study area, shrubland dominated by Potentilla fruticosa exhibits relatively strong carbon sequestration capability, whereas grassland dominated by Iris ensata Thunb has relatively lower carbon sequestration capacity. The soil TN and TP content in grassland are the highest among the three vegetation types, suggesting that grassland has a relatively strong capacity for nitrogen fixation and phosphorus enrichment [30][31][32][33][34][35][36][37].…”

Section: The Temporal Charateristics Of Soil C N P and Their Ecologic...mentioning

confidence: 99%

“…They play a crucial role as an ecological security barrier in the northwest of China, contributing significantly to biodiversity conservation. However, the ecological environment in the Qilian Mountains is fragile, susceptible to human activities, disturbances, and erosion (Zhao et al, 2016;Niu et al, 2021).The Qilian Mountains feature complex topography, representing a typical semi-arid mountainous ecosystem with elevations ranging from 2000 meters to 3800 meters. The vegetation exhibits distinct vertical zones along the elevation gradient, including grasslands, forest grasslands, subalpine shrubs, and sparse vegetation in high-altitude snow and ice regions (Wan et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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The Influence of Different Vegetation Types on Soil C, N, P Content, and Their Stoichiometry in the Eastern Qilian Mountains' Binggou River Basin

2024

AJEE

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To investigate the impact of vegetation types on the ecological stoichiometry of soil carbon, nitrogen, and phosphorus, and to reveal the nutrient limitation and cycling patterns in the terrestrial ecosystem of a tributary, Quanshui River, in the upper reaches of the Shiyang River. The study focused on the marshland of Quanshui River, shrubland of Iris lacteal Pall and Potentilla fruticosa, and the forest of Picea crassifolia. The analysis covered the characteristics of soil organic carbon (SOC), total nitrogen (TN), total phosphorus (TP) content, and stoichiometric ratios in the 0-60cm soil depth across different vegetation types. The results indicated that: (1) In the 0-60cm soil layer, SOC was highest in shrubland, followed by forest and grassland. TN was highest in grassland, followed by forest and shrubland. In the 0-30cm soil layer, grassland exhibited significantly higher TP content compared to forest and shrubland. SOC, TN, and TP content in forest, grassland, and shrubland were higher in the 0-10cm layer compared to the 10-20cm layer. ( 2) Soil C:N, C:P, and N:P ratios were significantly influenced by different vegetation types. The C:N and C:P ratios were highest in shrubland, followed by forest and grassland. The N:P ratio was highest in grassland, followed by forest and shrubland. The vegetation growth in Quanshui River was found to be more limited by soil nitrogen than phosphorus. Therefore, based on the actual conditions of vegetation types, the rational application of nitrogen and phosphorus fertilizers is recommended to enhance nutrient retention in the soil and maintain ecological balance.

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Section: Characteristics Of Soil Nutrients and Their Ecological Stoic...supporting

confidence: 91%

Section: The Temporal Charateristics Of Soil C N P and Their Ecologic...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Influence of Different Vegetation Types on Soil C, N, P Content, and Their Stoichiometry in the Eastern Qilian Mountains' Binggou River Basin

2024

AJEE

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“…The C:N ratio is mainly used to judge the degree of decomposition of organic matter in the soil. Studies have shown that when the C:N ratio is greater than 25, the accumulation rate of organic matter in the soil is greater than the decomposition rate; when the C:N ratio is between 12 and 16, microorganisms in the soil have well decomposed the organic matter, and it is difficult for any more organic matter to accumulate [29]. In this study, in the 0-20 cm soil layer, the C:N ratio of C. fargesii was between 16 and 25, indicating that there was no net accumulation or complete decomposition process of organic matter in it.…”

Section: Soil Carbon Nitrogen and Phosphorus Of Different Forest Stan...mentioning

confidence: 99%

Soil-Microbial CNP Content and Ecological Stoichiometry Characteristics of Typical Broad-Leaved Tree Communities in Fanjing Mountain in Spring

Luo,

Wu,

Chen

et al. 2024

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This study aims to investigate the impact of diverse forest stand types and soil depths on soil ecological stoichiometry characteristics, shedding light on nutrient limitations and cycling patterns within the mid-subtropical forest ecosystem in southwest China during spring. The research focused on four representative forest stands situated in Fanjing Mountain: Castanopsis fargesii (C. fargesii), Cyclobalanopsis multiervis (C. multiervis), Cyclobalanopsis argyrotricha (C. argyrotricha), and Rhododendron argyrophyllum Franch (R. argyrophyllum). Sample plots were established in these forest types, and soil samples were collected from the 0–20 cm and 20–40 cm soil layers in March, spring of 2023. Various soil parameters, including pH, soil organic carbon (SOC), total nitrogen (TN), total phosphorus (TP), soil microbial biomass carbon (MBC), soil microbial nitrogen (MBN), and soil microbial phosphorus (MBP) were measured, and their stoichiometric ratios were calculated. The findings of the study were as follows: (1) In the 0–20 cm soil layer, C. argyrotricha exhibited the highest soil organic carbon, followed by C. fargesii, C. multiervis, and R. argyrophyllum with the lowest content. No significant differences in soil organic carbon were observed among the four forests in the 20–40 cm soil layer. Additionally, C. argyrotricha displayed a significantly higher soil C:N ratio compared to other forest types in different soil layers. In the typical broad-leaved forest area of Fanjing Mountain, the TP was classified as deficient. (2) In the 0–20 cm soil layer, the MBC of C. fargesii surpassed C. multiervis, C. argyrotricha, and R. argyrophyllum by 26.59%, 42.92%, and 24.67%, respectively. There were no significant differences in soil MBC:MBP ratio and MBN:MBP ratio, regardless of forest species and soil depths. The low availability of soil nitrogen in different forest stand types in Fanjing Mountain strongly limits soil microorganism biomass. (3) The correlation between SOC, TN, TP, and their stoichiometric ratios varied across different soil layers. Therefore, in managing the Fanjing Mountain forest area, attention should be paid to supplementing N and P in the soil.

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Spatial heterogeneity and ecological stoichiometry characteristics of soil carbon, nitrogen and phosphorus under different micro-geomorphology in karst mountains

Cited by 2 publications

References 0 publications

The Influence of Different Vegetation Types on Soil C, N, P Content, and Their Stoichiometry in the Eastern Qilian Mountains' Binggou River Basin

The Influence of Different Vegetation Types on Soil C, N, P Content, and Their Stoichiometry in the Eastern Qilian Mountains' Binggou River Basin

Soil-Microbial CNP Content and Ecological Stoichiometry Characteristics of Typical Broad-Leaved Tree Communities in Fanjing Mountain in Spring

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