Enzyme Activity Stoichiometry Suggests That Fertilization, Especially Nitrogen Fertilization, Alleviates Nutrient Limitation of Soil Microorganisms in Moso Bamboo Forests

Forests, Journal Year: 2024, Volume and Issue: 15(6), P. 1040 - 1040

Published: June 16, 2024

Rational application of N fertilizer is essential for maintaining the long-term productivity Moso bamboo forests. Microbial activity a crucial indicator soil quality. Changes in nutrient resources due to addition can lead microbial limitations, thereby impeding maintenance Currently, there limited research on effects limitations forest soils. To examine changes extracellular enzyme and soils following application, we conducted an experiment northern Guizhou. The findings revealed that N3 treatment (726 kg·N·hm−2·yr−1) significantly reduced β-glucosidase (BG) by 27.61% compared control group (no fertilization). N1 (242 kg·N·hm−2·yr−1), N2 (484 treatments notably increased activities leucine aminopeptidase (LAP) N-acetyl-β-D-glucosidase (NAG) 11.45% 15.79%. Acid phosphatase (ACP) remained unaffected fertilization. decreased C:Ne C:Pe ratios, while N:Pe ratio was less influenced application. Scatter plots vector characteristics stoichiometry suggested microorganisms study area were C N, length angle, indicating alleviated limitation Redundancy Analysis (RDA) demonstrated biomass phosphorus (MBP) most critical factor affecting stoichiometry. Furthermore, Random Forest Regression analysis identified MBP N:Pm as significant factors influencing limitation, respectively. modulates acquisition strategy altering Formulating strategies based requirements more beneficial quality sustainably managing Additionally, our offers theoretical reference understanding carbon cycling ecosystems context substantial inputs.

Language: Английский

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Challenges in alpine meadow recovery: The minor effect of grass restoration on microbial resource limitation

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 374, P. 124086 - 124086

Published: Jan. 9, 2025

Language: Английский

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Effects of environmental factors on the phenotypic traits and seed element accumulation of wild Elymus nutans in Tibet

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: Jan. 13, 2025

Soil nutrients and meteorological conditions are pivotal environmental factors influencing plant growth development. This study systematically analyzes how soil influence the phenotypic seed production of wild Elymus nutans in Tibet. These critical ecological determinants, this research seeks to unveil complex diverse adaptation mechanisms species. The encompasses ten counties within Tibet Autonomous Region, with sampling points distributed across seven distinct environments. By evaluating root nutrient levels, collecting data, analyzing characteristics elemental composition at various points, assesses adaptability under conditions. Cluster analysis categorized 25 samples into four groups, each exhibiting significant differences height leaf length. Correlation revealed a negative correlation between point elevation NH₄⁺, total phosphorus, available phosphorus content, while positive was observed pH levels. Meteorological variables—including temperature, humidity, precipitation—significantly influenced phenotypes seeds. ammonium nitrogen, vital for nutans, their deficiency has impact on overall growth. Environments characterized by high altitude, aridity, intense radiation constrain Climatic altering environment, where quality plays role determining interact collectively ecosystem.

Language: Английский

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Study on the Characteristics of Soil Depletion and Degradation in the Coal Fire Area of the Southern Junggar Coalfield, Xinjiang, China

Land Degradation and Development, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 30, 2025

ABSTRACT Coal mining can lead to coal spontaneous combustion, especially in arid and semi‐arid areas, soil suffer varying degrees of depletion degradation, which be harmful the regional eco‐environment. However, characteristics degradation are not yet clear fire there fewer quality assessments. In this study, we studied ions, nutrient their stoichiometric ratios at different sampling points thermal effects. The principal component analysis membership function were used calculate index (SQI) comprehensively evaluate impact effects on (SQ). results showed that cations dominated by Na + anions Cl − SO 4 2− , higher temperature, concentration . concentrations tended increase with increasing while opposite was true for K Soil organic carbon (SOC) increased Total nitrogen (N) content lower when heated 40°C 5 d, N:P ratio 8.99. degree time only than 70°C 10 20 indicated SQ initially affected temperature. using Sikeshu (SKS) area (SQI = 0.183) Wugong (WG) 0.281). homemade heating experiment, SQI raw soil. SQIs consistent d indicating effect low temperature a long high short equivalent. study provide theoretical basis improvement ecological restoration areas.

Language: Английский

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Warming Does Not Change Vertical Variations in Microbial Resource Limitation in Subtropical Forests at China

Forests, Journal Year: 2025, Volume and Issue: 16(3), P. 402 - 402

Published: Feb. 24, 2025

Global warming can differentially alter ecosystem carbon, nitrogen, and phosphorus dynamics, regulating the balance between soil substrate supply microbial metabolic demand. However, empirical research on how influences resource limitation along profile remains limited, particularly in tropical–subtropical regions. Here, we investigated vertical variations (0–60 cm layers) their corresponding responses to subtropical forests southern China, using a experiment with heating cables (+4 °C) enzymatic stoichiometry. Alleviated carbon but aggravated nutrient (nitrogen phosphorus) for metabolism was observed profiles, regardless of treatment. Among different depths, mitigated conditions exacerbated 0–10 surface layer, had no significant effect below 20 depth. Moreover, nitrogen were primarily regulated by moisture fungal–bacterial ratio In contrast, changes driven under ambient conditions, carbon–phosphorus after warming. For soil, effects mainly explained biomass stoichiometry ratio. Overall, diverse entire profile. These findings provide important insights accurately predicting biogeochemical cycles global scenarios.

Language: Английский

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Understory Vegetation Regulated the Soil Stoichiometry in Cold-Temperate Larch Forests

Plants, Journal Year: 2025, Volume and Issue: 14(7), P. 1088 - 1088

Published: April 1, 2025

Carbon (C), nitrogen (N), and phosphorus (P) are vital nutrients in the soil, exerting a profound influence on primary productivity of ecosystems. However, our understanding how understory influences soil their stoichiometry remains limited, especially cold-temperate forests where plays crucial role mediating nutrient cycling. To elucidate effect vegetation nutrients, three typical larch forests, namely Sphagnum-Bryum-Rhododendron tomentosum-Larix gmelinii forest (SLL), Rhododendron dauricum-Larix (RL), (LL), were selected region northeast China to determine organic carbon (SOC), total (TN), (TP) contents, stoichiometric characteristics 0-100 cm depth. The results revealed following: (1) Significant differences its existed among different types (p < 0.001), with SLL displaying highest mean SOC, TN, TP as well C:N, C:P, N:P ratios, whereas RL exhibited lowest values 0.05). (2) Across profile, content showed decreasing trends depth, significant layers. (3) Variations significantly correlated bulk density, pH, temperature, water content, porosity, capillary porosity This study underscores necessity further consideration impact future research

Language: Английский

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Response of Soil Enzyme and Plant Stoichiometry to Root Interactions: Insights from Mixed Plantings of Moso Bamboo

Forests, Journal Year: 2025, Volume and Issue: 16(5), P. 722 - 722

Published: April 23, 2025

Root interactions are crucial in regulating soil microbial metabolism and plant nutrient allocation strategies, especially mixed plantings. However, the effects of planting direct root contact on properties remain unclear. Thus, we established potted plants with Moso bamboo (Phyllostachys edulis) Phoebe chekiangensis created a physical barrier to system without blocking chemical communication using four treatments: segregation (MT), (MS), pure (BT), (BS). We investigated changes content, enzyme activity, metabolic limitation. The results show that significantly affected content activities. Compared two treatments, increased carbon limitation but decreased nitrogen Physical between roots use efficiency (CUE) compared no segregation. Random forest analyses revealed best predictors C N limitations CUE were biomass dissolved organic (DON), respectively. Partial least squares path modeling indicated separation, directly indirectly, through their nutrients, biomass, Carbon contents. Our study provides further insights into factors influencing limitation, CUE, strategies plantations.

Language: Английский

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