Effects of Seasonal Rainfall Changes on N, P, and K Stoichiometric Characteristics in Leaves and Soil of Tropical Coastal Shelterbelt Forests

Forests, Journal Year: 2025, Volume and Issue: 16(4), P. 600 - 600

Published: March 29, 2025

Plant nitrogen (N), phosphorus (P), and potassium (K) concentrations ratios serve as critical indicators of nutrient constraints in coastal ecosystems. However, the response leaf–soil N-P-K stoichiometry tropical shelterbelt forests to seasonal rainfall variations remains poorly understood. This study measured total N, P, K contents leaves soils three typical Wenchang, China—Casuarina equisetifolia L., Cocos nucifera Pinus elliottii × caribaea—during August 2022 (wet season) February 2023 (dry season). Key findings are follows: (1) All exhibited low both soils, with significant stand-specific variations. Soil N:P were consistently below 14, indicating chronic N limitation for plant growth. (2) Wet seasons significantly altered stoichiometric ratios. (3) Leaf soil traits strong correlations, but these relationships diverged under transitions. (4) Shifts from wet dry increased sensitivity homeostasis, reflecting weakened buffering capacity. reveals cycling patterns shelterbelts, modulating soil–leaf coupling stability. These provide a theoretical basis optimizing management species configuration ecosystems climate variability.

Language: Английский

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Effect of Brassinolide on Stoichiometric Stability Characteristics of Tall Fescue under Drought Stress in Ecological Restoration

Sustainability, Journal Year: 2024, Volume and Issue: 16(14), P. 5942 - 5942

Published: July 12, 2024

In order to investigate the effects of brassinolide (BR) on ecological stoichiometric characteristics and internal stability plants in slope protection under different drought conditions, biomass, proline content, nutrient tall fescue (Festuca arundinacea) three stress periods were analyzed by weighing water control method, with degrees (75% ± 5%), mild (55% 5%) severe (35% four BR concentrations (0 mg/L, 0.05 0.2 mg/L 0.5 mg/L). The results showed that resulted a decrease plant biomass there differences carbon, nitrogen phosphorus contents their ratios organs. Spraying suitable concentration could alleviate loss promote accumulation fescue. Under normal spraying conditions BR, it is most for high sensitivity exogenous input, underground part increased clearly. propitious synthesis enhances resistance plants. According characteristics, can improve utilization efficiency certain extent, ratio show main factor limiting growth vegetation concrete restoration system, which supplement accelerate process restoration. application fescue, adjust distribution strategy stability, adverse This study provides new ideas methods reconstruction arid areas.

Language: Английский

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

Diversity, Journal Year: 2024, Volume and Issue: 16(4), P. 249 - 249

Published: April 22, 2024

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

Language: Английский

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N and P Deposition Increase the Aboveground Biomass in Northwest China by Regulating Multi-Dimensional Functional Traits

Published: Jan. 1, 2023

N and P deposition may influence soil salinization, biodiversity, plant functional traits, ultimately, the stand biomass in drylands. However, few studies have considered direct indirect effects of on biodiversity ecosystems, although multi-dimensional traits serve as important predictors biomass. To characterize how (including trait identity, diversity, network topology) affect spatial trends aboveground shrub communities along environmental gradients, we conducted transect sampling Northwest China. The results showed that coupled with precipitation regimes could improve salinization increase biomass, but had no significant effect species diversity communities. affected mainly by promoting identity several focal node negligible topology. (PTN) implies increasing its seasonality, a disproportionate N/P ratio lead to intensification limitation communities; thus, related acquisition tend exhibit closer connections other nodes PTN. Our indicate microenvironments are profound reflected traits.

Language: Английский

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