scholarly journals Soil, Leaf and Root Ecological Stoichiometry of Caragana korshinskii on the Loess Plateau of China in Relation to Plantation Age

PLoS ONE ◽  
2017 ◽  
Vol 12 (1) ◽  
pp. e0168890 ◽  
Author(s):  
Quanchao Zeng ◽  
Rattan Lal ◽  
Yanan Chen ◽  
Shaoshan An
Keyword(s):  
Loess Plateau ◽  
Ecological Stoichiometry ◽  
The Loess Plateau ◽  
Caragana Korshinskii ◽  
Plantation Age

Does Caragana korshinskii plantation increase soil carbon continuously in a water‐limited landscape on the Loess Plateau, China?

2019 ◽  
Vol 30 (14) ◽  
pp. 1691-1698 ◽  
Author(s):  
Qinglin Chai ◽  
Zhanying Ma ◽  
Qiqi An ◽  
Gao‐Lin Wu ◽  
Xiaofeng Chang ◽  
...  
Keyword(s):  
Soil Carbon ◽  
Loess Plateau ◽  
The Loess Plateau ◽  
Caragana Korshinskii

Coupling model of ecohydrology and simulation of typical shrub ecosystems on the Loess Plateau

2020 ◽  
Author(s):  
Yu Zhang ◽  
Xiaoyan Li ◽  
Wei Li ◽  
Weiwei Fang ◽  
Fangzhong Shi
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Loess Plateau ◽  
Field Experiments ◽  
Annual Precipitation ◽  
The Loess Plateau ◽  
Rainfall Interception ◽  
Area Index ◽  
Caragana Korshinskii

<p>Shrub is the main vegetation type for vegetation restoration in the Loess Plateau, which plays an important role in the regional ecosystem restoration. Study on the relationships between vegetation and soil water of typical shrub ecosystems are significant for the restoration and reconstruction of ecosystems in the Loess Plateau. Three typical shrub (<em>Hippophae rhamnoides</em> Linn., <em>Spiraea pubescens</em> Turcz., and <em>Caragana korshinskii</em> Kom.) ecosystems were chosen in the Loess Plateau. Field experiments were conducted to investigate the factors that influencing the processes of rainfall interception and root uptake of typical shrubs. S-Biome-BGC model was established based on the Biome-BGC model by developing the rainfall interception and soil water movement sub-models. The model was calibrated and verified using field data. The calibrated S-Biome-BGC model was used to simulate the characteristics of leaf area index (<em>LAI</em>), net primary productivity (<em>NPP</em>), soil water content and the interactions among them for the shrub ecosystems along the precipitation gradients in the Loess Plateau, respectively. The results showed that the predictions of the S-Biome-BGC model for soil water content and<em> LAI</em> of typical shrub ecosystems in Loess Plateau were significantly more accurate than that of Biome-BGC model. The simulated <em>RMSE</em> of soil water content decreased from 0.040~0.130 cm<sup>3</sup> cm<sup>-3</sup> to 0.026~0.035 cm<sup>3</sup> cm<sup>-3</sup>, and the simulated <em>RMSE</em> of<em> LAI</em> decreased from 0.37~0.70 m<sup>2</sup> m<sup>-2</sup> to 0.35~0.37 m<sup>2</sup> m<sup>-2</sup>. Therefore, the S-Biome-BGC model can reflect the interaction between plant growth and soil water content in the shrub ecosystems of the Loess Plateau. The S-Biome-BGC model simulation for <em>LAI</em>,<em> NPP</em> and soil water content of the three typical shrubs were significantly different along the precipitation gradients, and increased with annual precipitation together. However, different <em>LAI</em>, <em>NPP</em> and soil water correlations were found under different precipitation gradients.<em> LAI</em> and<em> NPP</em> have significant positive correlations with soil water content in the areas where the annual precipitation is above 460~500 mm that could afford the shrubs growth. The results of the study provide a re-vegetation threshold to guide future re-vegetation activities in the Loess Plateau.</p>

scholarly journals Effects of Vegetation Restoration on the Distribution of Nutrients, Glomalin-Related Soil Protein, and Enzyme Activity in Soil Aggregates on the Loess Plateau, China

Forests ◽  
2019 ◽  
Vol 10 (9) ◽  
pp. 796 ◽  
Author(s):  
Leilei Qiao ◽  
Yuanze Li ◽  
Yahui Song ◽  
Jiaying Zhai ◽  
Yang Wu ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Loess Plateau ◽  
Soil Enzymes ◽  
Ecological Stoichiometry ◽  
Soil Aggregates ◽  
Soil Aggregate ◽  
Vegetation Restoration ◽  
The Loess Plateau ◽  
Nutrient Metabolism ◽  
Soil Protein

Research Highlights: Soil enzymes have a significant impact on the production of glomalin-related soil protein (GRSP), directly and indirectly affecting the nutrient metabolism balance, but there is little available information on ecological stoichiometry in soil aggregates. Background and Objectives: Vegetation restoration changes community structure and species composition in ecosystems, thus changing the physicochemical properties of soil. Soil aggregate is the most basic physical structure of the soil. Therefore, in order to understand dynamic changes in soil aggregate nutrients as vegetation restoration progresses, we set out to investigate the nutrient distribution and utilization in aggregates, and how enzymes respond to the nutrient changes in achieving a nutritional balance along successive stages of vegetation restoration. Materials and Methods: We collected and analyzed soil from plots representing six different stages of a vegetation restoration chronosequence (0, 30, 60, 100, 130, and 160 years) after farmland abandonment on the Loess Plateau, China. We investigated soil nutrient stoichiometry, GRSP, and enzyme stoichiometry in the different successional stages. Results: The results revealed that soil organic carbon, total nitrogen, enzyme activity, and GRSP increased with vegetation recovery age, but not total phosphorus, and not all enzymes reached their maximum in the climax forest community. The easily extractable GRSP/total GRSP ratio was the largest at the shrub community stage, indicating that glomalin degradation was the lowest at this stage. Ecological stoichiometry revealed N-limitation decreased and P-limitation increased with increasing vegetation restoration age. Soil enzymes had a significant impact on the GRSP production, directly and indirectly affecting nutrient metabolism balance. Conclusions: Further study of arbuscular mycorrhizal fungi to identify changes in their category and composition is needed for a better understanding of how soil enzymes affect their release of GRSP, in order to maintain a nutrient balance along successive stages of vegetation restoration.

scholarly journals Shoot-soil ecological stoichiometry of alfalfa under nitrogen and phosphorus fertilization in the Loess Plateau

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jiaoyun Lu ◽  
Hong Tian ◽  
Heshan Zhang ◽  
Junbo Xiong ◽  
Huimin Yang ◽  
...  
Keyword(s):  
Loess Plateau ◽  
Ecological Stoichiometry ◽  
Effective Means ◽  
Phosphorus Fertilization ◽  
The Loess Plateau ◽  
Nitrogen And Phosphorus ◽  
Soil C ◽  
Soil P ◽  
P Limitation ◽  
C And N

AbstractPlants and soil interactions greatly affect ecosystems processes and properties. Ecological stoichiometry is an effective means to explore the C, N, P correlation between plants and soil and the relationship between plant growth and nutrient supply. Serious soil erosion on China’s Loess Plateau has further barrenness the soil. Fertilization solves the problem of ecosystem degradation by improving soil fertility and regulating the ecological stoichiometric between soil and plants. No fertilization (CK), nitrogen fertilization (N), phosphorus fertilization (P) and N and P combined fertilization (NP) treatments were set in an alfalfa grassland. Organic carbon (C), nitrogen (N) and phosphorus (P) nutrients and their stoichiometry were measured in shoot and soil. P and NP fertilization increased shoot C concentration (3.12%, 0.91%), and all fertilization decreased shoot N concentration (6.96%). The variation of shoot C and N concentrations resulted in a greater increase in shoot C:N under the fertilization treatment than that under CK (8.24%). Most fertilization treatments increased shoot P concentration (4.63%) at each cut, which induced a decrease of shoot C:P. Shoot N:P of most treatments were greater than 23, but it was lower under N and NP fertilization than that under CK. Fertilization only increased soil C in 2014, but had no effect on soil N. Soil P content was significantly higher under P fertilization in 2014 (34.53%), and all fertilization in the second cut of 2015 (124.32%). Shoot and soil C:P and N:P having the opposite changes to shoot and soil P, respectively. Our results suggest that the change of P after fertilization largely drove the changes of stoichiometric. The growth of alfalfa in the Loess Plateau was severely restricted by P. It is an effective method to increase the biomass of alfalfa by increasing the addition of N or NP fertilizer to alleviate P limitation.

Water use patterns differed notably with season and slope aspect for Caragana korshinskii on the Loess Plateau of China

CATENA ◽  
2021 ◽  
Vol 198 ◽  
pp. 105028
Author(s):  
Zhixue Chen ◽  
Guohui Wang ◽  
Yanhui Pan ◽  
Xianlong Yang ◽  
Yuying Shen
Keyword(s):  
Water Use ◽  
Loess Plateau ◽  
Slope Aspect ◽  
The Loess Plateau ◽  
Use Patterns ◽  
Caragana Korshinskii ◽  
Water Use Patterns

scholarly journals Above-Ground Biomass Models of Caragana korshinskii and Sophora viciifolia in the Loess Plateau, China

2019 ◽  
Vol 11 (6) ◽  
pp. 1674 ◽  
Author(s):  
Yanxing Dou ◽  
Yang Yang ◽  
Shaoshan An
Keyword(s):  
Loess Plateau ◽  
Leaf Biomass ◽  
Biomass Estimation ◽  
Above Ground Biomass ◽  
The Loess Plateau ◽  
Ground Biomass ◽  
Caragana Korshinskii ◽  
Canopy Volume ◽  
Branch Biomass ◽  
Estimation Models

The quantification of above-ground biomass is based on the calculation of carbon storage, which is important for the balance of carbon cycling. However, the allometric models of shrubs for calculating the above-ground biomass of shrubs in the Loess Plateau are scarce. In order to solve this issue, this study analyzed some highly correlated variables, including height (H), branch diameters (D), canopy volume (Cv), canopy area (Ca), and then built a regression model to predict the above-ground biomass in two common shrubs (Caragana korshinskii and Sophora viciifolia) in the Loess Plateau, China. The results show that the above-ground biomass of these two shrubs can be accurately predicted by H and D, and then we can use allometric model (y = axb) to calculate shrub above-ground biomass (including leaf biomass and branch biomass). Furthermore, the correlation between leaf biomass and branch biomass in Caragana korshinskii and Sophora viciifolia indicates that the components of above-ground biomass are closely related to each other. In addition, there is a strong linear relationship (p < 0.01) between the observed and estimated biomass values, which confirms the data accuracy of the above-ground biomass estimation models. In summary, these two biomass estimation models provide an accurate way to estimate the quantification of carbon for shrubs in the Loess Plateau.

Relative contribution of photorespiration and antioxidative mechanisms in Caragana korshinskii under drought conditions across the Loess Plateau

2017 ◽  
Vol 44 (11) ◽  
pp. 1111 ◽  
Author(s):  
Juan Bai ◽  
Tai Kang ◽  
Hongdou Wu ◽  
Baiyan Lu ◽  
Xiaogang Long ◽  
...  
Keyword(s):  
Loess Plateau ◽  
Reduced Glutathione ◽  
Photosynthetic Apparatus ◽  
Protective Role ◽  
The Loess Plateau ◽  
Sod Activity ◽  
Relative Contribution ◽  
Caragana Korshinskii ◽  
Drought Tolerant ◽  
Significant Difference

The drought-tolerant plant Caragana korshinskii Kom. was used to investigate the relative contribution of photorespiration and antioxidative mechanisms to water-stress adaptations across the Loess Plateau. The samples were collected from Shenmu, Yulin and Dongsheng along with the reduction of rainfall. The results showed the lower leaf water potential and the lower content of O2•– and malondialdehyde (MDA) were found in the plants in drier zone. H2O2 didn’t show a significant difference among these sampling sites. Both photorespiratory rate (PR) and net photosynthetic rate (PN) increased with the decrease of rainfall. Low rainfall upregulated the gene expression and activities of photorespiratory enzymes. In addition, ascorbate peroxidase (APX), glutathione peroxidase (GPX) and superoxide dismutase (SOD) activity and reduced glutathione (GSH), ascorbic acid (AsA) contents increased with the decrease of rainfall, whereas catalase (CAT) activity decreased. These results indicate photorespiration could play a protective role for the photosynthetic apparatus from photoinhibition and photodamage under low rainfall levels, which could also act together with the antioxidation system to improve the tolerance to drought in C. korshinskii.

scholarly journals Inter- and intra-event rainfall partitioning dynamics of two typical xerophytic shrubs in the Loess Plateau of China

2022 ◽  
Author(s):  
Jinxia An ◽  
Guangyao Gao ◽  
Chuan Yuan ◽  
Bojie Fu
Keyword(s):  
Loess Plateau ◽  
Water Storage ◽  
Temporal Variations ◽  
Individual Plant ◽  
The Loess Plateau ◽  
Event Scale ◽  
Caragana Korshinskii ◽  
Canopy Area ◽  
Interception Loss ◽  
Canopy Water

Abstract. Rainfall is known as the main water replenishment in dryland ecosystem, and rainfall partitioning by vegetation reshapes the spatial and temporal distribution patterns of rainwater entry into the soil. The dynamics of rainfall partitioning have been extensively studied at the inter-event scale, yet very few studies have explored its finer intra-event dynamics and the relating driving factors for shrubs. Here, we conducted a concurrent in-depth investigation of rainfall partitioning at inter- and intra-event scales for two typical xerophytic shrubs (Caragana korshinskii and Salix psammophila) in the Liudaogou catchment of the Loess Plateau, China. The event throughfall (TF), stemflow (SF), and interception loss (IC) and their temporal variations within the rainfall event as well as the meteorological factors and vegetation characteristics were systematically measured during the 2014–2015 rainy seasons. The C. korshinskii had significantly higher SF percentage (9.2 %) and lower IC percentage (21.4 %) compared to S. psammophila (3.8 % and 29.5 %, respectively) (p < 0.05), but their TF percentages were not significantly different (69.4 % vs. 66.7 %). At the intra-event scale, TF and SF of S. psammophila was initiated (0.1 vs. 0.3 h and 0.7 vs. 0.8 h) and peaked (1.8 vs. 2.0 h and 2.1 vs. 2.2 h) more quickly, and TF of S. psammophila lasted longer (5.2 vs. 4.8 h), delivered more intensely (4.3 vs. 3.8 mm∙h−1), whereas SF of C. korshinskii lasted longer (4.6 vs. 4.1 h), delivered more intensely (753.8 vs. 471.2 mm∙h−1). For both shrubs, rainfall amount was the most significant factor influencing inter-event rainfall partitioning, and rainfall intensity and duration controlled the intra-event TF and SF variables. The C. korshinskii with larger branch angle, more small branches and smaller canopy area, has an advantage to produce stemflow more efficiently over S. psammophila. The S. psammophila has lower canopy water storage capacity to generate and peak throughfall and stemflow earlier, and it has larger aboveground biomass and total canopy water storage of individual plant to produce higher interception loss compared to C. korshinskii. These findings contribute to the fine characterization of shrub-dominated eco-hydrological processes, and improve the accuracy of water balance estimation in dryland ecosystem.

Throughfall and its influential factors of a typical xerophytic shrub (Caragana korshinskii) in northern Shaanxi in the Loess Plateau of China

2018 ◽  
Vol 38 (17) ◽  
Author(s):  
艾长江 AI Changjiang ◽  
高光耀 GAO Guangyao ◽  
袁川 YUAN Chuan ◽  
童菊秀 TONG Juxiu ◽  
安金霞 AN Jinxia ◽  
...  
Keyword(s):  
Loess Plateau ◽  
Influential Factors ◽  
The Loess Plateau ◽  
Caragana Korshinskii ◽  
Northern Shaanxi
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