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293 results on '"Wang, Ruzhen"'

22. Global pattern of organic carbon pools in forest soils.

Author

Zhang, Yuxue, Guo, Xiaowei, Chen, Longxue, Kuzyakov, Yakov, Wang, Ruzhen, Zhang, Haiyang, Han, Xingguo, Jiang, Yong, and Sun, Osbert Jianxin

Subjects
FOREST soils, FOREST management, BROADLEAF forests, CONIFEROUS forests, MIXED forests, SOIL mineralogy
Abstract

Understanding the mechanisms of soil organic carbon (SOC) sequestration in forests is vital to ecosystem carbon budgeting and helps gain insight in the functioning and sustainable management of world forests. An explicit knowledge of the mechanisms driving global SOC sequestration in forests is still lacking because of the complex interplays between climate, soil, and forest type in influencing SOC pool size and stability. Based on a synthesis of 1179 observations from 292 studies across global forests, we quantified the relative importance of climate, soil property, and forest type on total SOC content and the specific contents of physical (particulate vs. mineral‐associated SOC) and chemical (labile vs. recalcitrant SOC) pools in upper 10 cm mineral soils, as well as SOC stock in the O horizons. The variability in the total SOC content of the mineral soils was better explained by climate (47%–60%) and soil factors (26%–50%) than by NPP (10%–20%). The total SOC content and contents of particulate (POC) and recalcitrant SOC (ROC) of the mineral soils all decreased with increasing mean annual temperature because SOC decomposition overrides the C replenishment under warmer climate. The content of mineral‐associated organic carbon (MAOC) was influenced by temperature, which directly affected microbial activity. Additionally, the presence of clay and iron oxides physically protected SOC by forming MAOC. The SOC stock in the O horizons was larger in the temperate zone and Mediterranean regions than in the boreal and sub/tropical zones. Mixed forests had 64% larger SOC pools than either broadleaf or coniferous forests, because of (i) higher productivity and (ii) litter input from different tree species resulting in diversification of molecular composition of SOC and microbial community. While climate, soil, and forest type jointly determine the formation and stability of SOC, climate predominantly controls the global patterns of SOC pools in forest ecosystems. [ABSTRACT FROM AUTHOR]

Published
2024
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27. Plant functional traits modulate the effects of soil acidification on above- and belowground biomass.

Author

Feng, Xue, Wang, Ruzhen, Li, Tianpeng, Cai, Jiangping, Liu, Heyong, Li, Hui, and Jiang, Yong

Subjects
SOIL acidification, BIOMASS, PLANT biomass, SOIL acidity, NATURAL resources, PLATEAUS
Abstract

Atmospheric sulfur (S) deposition has been increasingly recognized as a major driver of soil acidification. However, little is known about how soil acidification influences above- and belowground biomass by altering leaf and root traits. We conducted a 3-year S-addition experiment to simulate soil acidification in a meadow. Grass (Leymus chinensis (Trin.) Tzvelev) and sedge (Carex duriuscula C.A.Mey) species were chosen to evaluate the linkage between plant traits and biomass. Sulfur addition led to soil acidification and nutrient imbalances. Soil acidification decreased specific leaf area (SLA) but increased leaf dry-matter content (LDMC) in L. chinensis, showing a conservative strategy and thus suppressing aboveground instead of belowground biomass. However, in C. duriuscula, soil acidification increased plant height and root nutrients (N, P, S, and Mn), favoring competition for natural resources through enhanced above- and belowground biomass, i.e., adoption of an acquisitive strategy. Increased soil acidity resulted in an overall reduction in aboveground community biomass by 3 %–33 %, but it led to an increase in community root biomass by 11 %–22 % due to upregulation as a result of higher soil nutrient availability. Our results demonstrate that both above- and belowground plant biomass is affected by S-induced acidification. Understanding the linkage between plant biomass and functional traits contributes to a better understanding of plant–soil feedback in grassland ecosystems. [ABSTRACT FROM AUTHOR]

Published
2024
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39. Resprouting ability differs among plant functional groups along a soil acidification gradient in a meadow: A rhizosphere perspective

Author

Chinese Academy of Sciences, National Natural Science Foundation of China, Wang, Ruzhen [0000-0001-8654-6677], Zhang, Ying, Wang, Ruzhen, Sardans, Jordi, Wang, Bin, Gu, Baitao, Li, Yanyan, Liu, Heyong, Peñuelas, Josep, Jiang, Yong, Chinese Academy of Sciences, National Natural Science Foundation of China, Wang, Ruzhen [0000-0001-8654-6677], Zhang, Ying, Wang, Ruzhen, Sardans, Jordi, Wang, Bin, Gu, Baitao, Li, Yanyan, Liu, Heyong, Peñuelas, Josep, and Jiang, Yong

Abstract

Soil acidification as a global change factor can devastatingly affect plant growth and productivity. In frequently disturbed ecosystems, plant resprouting ability strongly determines biomass reconstruction and resilience after aboveground damage. However, how plant regrowth responds to soil acidification remains largely unknown, especially regarding the role of the rhizosphere in mediating this response. We manipulated a soil-acidification gradient via adding purified elemental sulfur powder at various rates (0-50 g S m−2 year−1) in a frequently mown meadow. Shoot regrowth of functional groups were measured after clipping and supporting roles of rhizosphere versus bulk soils were disentangled using isotope labelling along the acidification gradient. Regrowth of grasses and sedges increased while forbs decreased along the acidification gradient. The results suggest that grasses were competitors capable of taking up nutrients from both rhizosphere and bulk soils, while sedges were acid-tolerators with lower sensitivity to decreased nitrogen-mineralization rates. Forbs, as typical ruderals, were vulnerable to N competition with microbes, particularly in the rhizosphere soil. Therefore, biomass regrowth of forbs was explained more by physicochemical and biological parameters from the rhizosphere than bulk soil Synthesis. Divergent interplay between plant functional groups and rhizosphere soils was the prominent driver for biomass regrowth responding to soil acidification.

Published
2022

42. A Conceptual Framework on the Fate of Rhizodeposits in Forming Mineral-Associated Organic Matter or Encapsulating Into Microaggreagtes.

Author

Wang, Ruzhen and Gu, Baitao

Abstract

Rhizodeposition, as transported from photosynthates and exudated in soils via fine roots, is the pivot linking above- and belowground carbon (C) cycling pathways. Meanwhile, rhizodeposit C serves as "currency" for plant nutrient acquisition because of its critical roles in priming soil microorganisms, maintaining plant-mycorrhizal symbionts, and elongating plant roots. Therefore, a conceptual framework integrating knowledge on the biogeochemical fate of rhizodeposit C can help understand plant nutrient economics and soil C sink function. However, it still remains a great challenge to efficiently delineate the dynamics of rhizodeposit C in soils. In the framework, we present the possible stabilization pathways of rhizodeposit C via formation of mineral-associated organic matter (MAOM) or encapsulation by microaggregates. We further propose that continuous and pulse 13CO2 labeling are powerful techniques to track the fate of rhizodeposit C and to quantify how much C could eventually be sequestrated in soils as the component of MAOM or microaggregates. This framework would provide future research possibilities to better optimize plant C allocation and productivity and preserve soil C stocks. [ABSTRACT FROM AUTHOR]

Published
2023
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44. Enhanced foliar15 Nenrichment with increasing nitrogen addition rates: Role of plant species and nitrogen compounds

Author

Wang, Yinliu, primary, Niu, Guoxiang, additional, Wang, Ruzhen, additional, Rousk, Kathrin, additional, Li, Ang, additional, Hasi, Muqier, additional, Wang, Changhui, additional, Xue, Jianguo, additional, Yang, Guojiao, additional, Lü, Xiaotao, additional, Jiang, Yong, additional, Han, Xingguo, additional, and Huang, Jianhui, additional

Published
2022
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