Response of Ecoenzymatic Stoichiometry to Soil Physicochemical Properties after Afforestation on Loess Hilly Region

Yan, Shengji; Li, Boyong; Gao, Dexin; Fu, Shuyue; Lu, Yao; Xu, Miaoping; Ren, Chao; Han, Xinhui

doi:10.1134/s1064229320110125

Cited by 4 publications

(1 citation statement)

References 34 publications

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“…As the most important elements that affect plant growth, the stoichiometric ratios of soil carbon (C), nitrogen (N), and phosphorus (P) have been extensively studied worldwide, since being officially proposed in 2002 [2][3][4]. As essential catalysts employed by microorganisms to decompose complex organic matter in soil, enzymes are the key driving forces behind nutrient cycling; thus, the C, N, and P contents of soil are intimately related to soil enzyme activities [5]. As they are affected by climate, topography, vegetation type, and anthropogenic disturbances, the soil C, N, and P contents and enzyme activities often exhibit spatial heterogeneity [6,7].…”

Section: Introductionmentioning

confidence: 99%

Altitudinal Gradients Modify the Ecological Stoichiometry and Enzyme Activities of Soil in a Natural Secondary Quercus spp. Forest of the Dabie Mountains

Huang

Zhang

Zuo

et al. 2023

Forests

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Understanding the vertical distribution and driving mechanisms behind soil carbon (C), nitrogen (N), and phosphorus (P) contents and enzyme activities along elevation gradients is of great significance for the healthy and sustainable management of forest ecosystems. For this study, the 0–20 cm soil-layer samples of different natural Quercus spp. secondary forests from eight altitude gradients (ranging from 250 to 950 m) were investigated to quantify their physicochemical properties, ecological stoichiometry characteristics, and enzyme activities. The results indicated that the soil nutrient content of natural secondary Quercus spp. forests in the Dabie Mountains was low, with average soil organic carbon (SOC) and total phosphorus (TP) contents of 19.86 ± 3.56 g·kg−1 and 0.68 ± 0.10 g·kg−1, respectively, which were 19.14% and 12.82% lower, respectively, than the Chinese average. In terms of vertical spatial distribution, the SOC, total nitrogen (TN), and TP contents of the soil at high altitudes (≥750 m) were greater than those at middle- and low-altitude areas and reached the maximum value at or near the top of the mountain (850–950 m). The stoichiometric attributes of the soil ecosystem fluctuated with the higher altitudes in vertical space; however, the fluctuation range was not significant. The C:N, N:P, and C:P ratios reached their maximum values at altitudes of 250, 750, and 850 m, respectively. However, the overall average value remained generally lower than the national average; thus, in forest management, attention should be paid to the supplementation of the soil with C and P. The activities of soil sucrase, urease, acid phosphatase, and catalase were interconnected across the overall space, and increased with altitude. The SOC, TP, and pH were the main factors that influenced the changes in soil enzyme activities.

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Section: Introductionmentioning

confidence: 99%

Altitudinal Gradients Modify the Ecological Stoichiometry and Enzyme Activities of Soil in a Natural Secondary Quercus spp. Forest of the Dabie Mountains

Huang

Zhang

Zuo

et al. 2023

Forests

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Altered microbial P cycling genes drive P availability in soil after afforestation

Zhi

Deng

et al. 2023

Journal of Environmental Management

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Microbial communities in terrestrial surface soils are not widely limited by carbon

Cui

Peng

Delgado‐Baquerizo

et al. 2023

Global Change Biology

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Microbial communities in soils are generally considered to be limited by carbon (C), which could be a crucial control for basic soil functions and responses of microbial heterotrophic metabolism to climate change. However, global soil microbial C limitation (MCL) has rarely been estimated and is poorly understood. Here, we predicted MCL, defined as limited availability of substrate C relative to nitrogen and/or phosphorus to meet microbial metabolic requirements, based on the thresholds of extracellular enzyme activity across 847 sites (2476 observations) representing global natural ecosystems. Results showed that only about 22% of global sites in terrestrial surface soils show relative C limitation in microbial community. This finding challenges the conventional hypothesis of ubiquitous C limitation for soil microbial metabolism. The limited geographic extent of C limitation in our study was mainly attributed to plant litter, rather than soil organic matter that has been processed by microbes, serving as the dominant C source for microbial acquisition. We also identified a significant latitudinal pattern of predicted MCL with larger C limitation at mid‐ to high latitudes, whereas this limitation was generally absent in the tropics. Moreover, MCL significantly constrained the rates of soil heterotrophic respiration, suggesting a potentially larger relative increase in respiration at mid‐ to high latitudes than low latitudes, if climate change increases primary productivity that alleviates MCL at higher latitudes. Our study provides the first global estimates of MCL, advancing our understanding of terrestrial C cycling and microbial metabolic feedback under global climate change.

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Response of Ecoenzymatic Stoichiometry to Soil Physicochemical Properties after Afforestation on Loess Hilly Region

Cited by 4 publications

References 34 publications

Altitudinal Gradients Modify the Ecological Stoichiometry and Enzyme Activities of Soil in a Natural Secondary Quercus spp. Forest of the Dabie Mountains

Altitudinal Gradients Modify the Ecological Stoichiometry and Enzyme Activities of Soil in a Natural Secondary Quercus spp. Forest of the Dabie Mountains

Altered microbial P cycling genes drive P availability in soil after afforestation

Microbial communities in terrestrial surface soils are not widely limited by carbon

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