Land Degradation & Development最新文献_第4页

Changes in Soil Properties, Organic Carbon, and Nutrient Stocks After Land‐Use Change From Forests to Grasslands in Kumaun Himalaya, India

IF 4.7 2区农林科学

Land Degradation & Development Pub Date : 2025-02-06 DOI: 10.1002/ldr.5507

Archana Fartyal, Surendra Singh Bargali, Kiran Bargali, Bhawna Negi

{"title":"Changes in Soil Properties, Organic Carbon, and Nutrient Stocks After Land‐Use Change From Forests to Grasslands in Kumaun Himalaya, India","authors":"Archana Fartyal, Surendra Singh Bargali, Kiran Bargali, Bhawna Negi","doi":"10.1002/ldr.5507","DOIUrl":"https://doi.org/10.1002/ldr.5507","url":null,"abstract":"Land‐use changes are anticipated to be a substantial contributor to global change climate, substantially causing significant modifications in soil characteristics. This study addressed the impact of land‐use change from native forests to grasslands on the soil physico‐chemical properties in entirely replicated grasslands of three different forest zones (Oak, Pine and Cypress) in temperate region of Kumaun Himalaya. A total of 162 soil samples (6 sites × 3 plots × 3 seasons × 3 depths = 162 samples) were randomly collected from each site in triplicates from depths. The soil texture, bulk density (bD), porosity, water holding capacity, soil moisture content, pH, organic carbon (SOC), total nitrogen (TN), available phosphorus (P) and available potassium (K) were determined at different depths in forest and grassland sites. Results showed that soil bD, pH, SOC, TN, P and K significantly (p < 0.05) decreased with increasing depth. Moreover, conversion of forests into grassland reduced nutrient concentrations, physical qualities (bD and porosity), and pH levels. The decreasing trend of nutrient along the soil depth explains that the zone of nutrient accumulation is not well established in these grasslands because of the substantial leaching effect. Our findings indicate that conversion of natural forests into grasslands resulted in significant losses of SOC and TN stocks which can be attributed to the disturbance of natural forests. Therefore, while making land‐use change plans, the impact of these alterations on soil nutrients must be considered. These findings emphasize the value of establishing natural vegetation (forests) in these areas to retain nutrients and safeguard soil against runoff and erosion. However, anticipating the physico‐chemical impacts of land‐use alteration necessitates a better comprehension of its relations with other drivers of global change, such as changing climate and nitrogen deposition.","PeriodicalId":203,"journal":{"name":"Land Degradation & Development","volume":"164 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143191799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dissolved Organic Matter Within Soil Aggregates in Forest Restoration: Insights From Optical Properties

IF 4.7 2区农林科学

Land Degradation & Development Pub Date : 2025-02-06 DOI: 10.1002/ldr.5509

Gui-bang Zhang, Qing-wei Zhang, Wen-xuan Kuan, Jian Wang, Jun'e Liu, Hao Wang, Ming Li

{"title":"Dissolved Organic Matter Within Soil Aggregates in Forest Restoration: Insights From Optical Properties","authors":"Gui-bang Zhang, Qing-wei Zhang, Wen-xuan Kuan, Jian Wang, Jun'e Liu, Hao Wang, Ming Li","doi":"10.1002/ldr.5509","DOIUrl":"https://doi.org/10.1002/ldr.5509","url":null,"abstract":"Forest restoration with Robinia pseudoacacia L. has many benefits, and dynamics of dissolved organic matter (DOM) might provide insight into soil restoration. Nevertheless, studies regarding the changes in the DOM within soil aggregates during artificial forest restoration are relatively limited in semiarid regions. Soil aggregates were collected from the topsoil, middle soil, and subsoil layers (i.e., 0–20, 30–50, and 80–100 cm) at six forests (i.e., R. pseudoacacia L.) lands with various restoration ages in a typical semiarid region. The variations of DOM properties in silt + clay size classes, microaggregates and macroaggregates (i.e., < 0.053 mm, 0.053–0.25 mm, and > 0.25 mm) were explored by UV–visible and three-dimensional excited emission matrix spectral. Overall, dissolved organic carbon (DOC) content (41.24–119.82 mg kg−1) of soil aggregates generally increased with restoration age. The DOC content in topsoil aggregates was 3.11–7.13 times larger than those from the other two soil layers. The molecular weight, aromaticity degree, and humification degree had the same trends as that of DOC content with soil depth. The DOC content and aromaticity degree of DOM in macroaggregates were 1.26–4.27 times and 1.01–1.18 times higher than those in microaggregates and silt + clay size classes at most soil layers, respectively. These variations in DOM within soil aggregates were primarily attributed to the changes in soil texture and the densities of plant roots and litter during the forest restoration. The study reveals the positive impact of forest restoration on the increase of DOC content, providing scientific evidence for soil management.","PeriodicalId":203,"journal":{"name":"Land Degradation & Development","volume":"79 2 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143258370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dilemma of Harvested Cropland and Land Degradation in Agriculture Growth: Determining the Role of Water and Green Energy Resources

IF 4.7 2区农林科学

Land Degradation & Development Pub Date : 2025-02-06 DOI: 10.1002/ldr.5499

Hao Hu, Guangqiang Luo

{"title":"Dilemma of Harvested Cropland and Land Degradation in Agriculture Growth: Determining the Role of Water and Green Energy Resources","authors":"Hao Hu, Guangqiang Luo","doi":"10.1002/ldr.5499","DOIUrl":"https://doi.org/10.1002/ldr.5499","url":null,"abstract":"Research has paid much attention to climate change and natural resource management while overlooking a critical area of harvested cropland, land degradation, and agricultural growth. Nonetheless, the global population is rapidly increasing, and China, as the most populated economy globally, could face the issue of land degradation and scarcity of agricultural products. It is crucial to recognize the factors determining agriculture growth in the region. In this regard, this research intends to analyze the influence of land degradation, agriculture cropland, and agricultural growth. China has increased its green energy production and consumption climate change abatement, and water utilization for industrial and agricultural purposes. Therefore, these factors are also considered along with the socioeconomic conditions and technological advancement. Covering the quarterly data from 1980Q1 to 2023Q4, this research uses time series cointegration tests, which validate the presented of long-run association. Following the mixed order of integration on variables, this uses the autoregressive distributed lag approach. The results mention that harvested cropland, water resources, and green energy are the significant drivers of agriculture growth in the short and long run. The study recommends investing in modern agriculture technology, implementing policies to improve socioeconomic conditions, enhancing circular economy and maintaining food security.","PeriodicalId":203,"journal":{"name":"Land Degradation & Development","volume":"38 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143258371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improving Ecological Barrier Area Sustainability Integrating Ecosystem Service Interaction and Social–Ecological System Coupling

IF 4.7 2区农林科学

Land Degradation & Development Pub Date : 2025-02-06 DOI: 10.1002/ldr.5506

Sinan Li, Junwei Pu, Xiaodong Deng, Baiyu Dong, Yue Su

{"title":"Improving Ecological Barrier Area Sustainability Integrating Ecosystem Service Interaction and Social–Ecological System Coupling","authors":"Sinan Li, Junwei Pu, Xiaodong Deng, Baiyu Dong, Yue Su","doi":"10.1002/ldr.5506","DOIUrl":"https://doi.org/10.1002/ldr.5506","url":null,"abstract":"Ecological barrier areas are the natural area with special ecological functions, and play a vital role in maintaining the global ecological balance, protecting biodiversity, and regulating climate. They also profoundly affect the local social system and the inhabitants' lifestyle. Mitigating trade-offs between distinct ecosystem services and enhancing social–ecological system coupling are essential for the sustainable development of ecological barrier areas. However, the lack of integrating them on topographical gradient features compromises our ability to design precise interventions for regional sustainability. Taking the Sichuan-Yunnan Ecological Barrier area as a case area, this study developed a management approach by integrating ecosystem service interactions and social–ecological system coupling under multidimensional topographical gradients to provide a reference for assessing and improving the sustainability of the ecological barrier area. The results demonstrated that during 2010–2020, topography played a key role in shaping ecosystem service interactions, with the hilly area showing the highest synergistic level for multiple service pairs. The high and highest relief mountain areas had the lowest coupling index of the social–ecological system; this coupling index decreased rapidly in the flatter areas, while it increased in the low and middle relief mountain areas. Based on the above multi-dimensional characteristics, six sustainable development zones were subdivided for formulating differentiated management strategies and improving regional sustainability. This research provides essential insights for improving the sustainability of ecological barrier area regarding differentiated territorial spatial management strategies, and delivers guidance for coordinating relationships between social and ecological systems in other similar areas.","PeriodicalId":203,"journal":{"name":"Land Degradation & Development","volume":"140 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143258321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integrated Evaluation Approach for Land Sustainable Management and Carrying Capacity of Clustered Mining Area in the Cement City of South India

IF 4.7 2区农林科学

Land Degradation & Development Pub Date : 2025-02-04 DOI: 10.1002/ldr.5501

E. Kumar, T. Subramani, P. Gopinathan

{"title":"Integrated Evaluation Approach for Land Sustainable Management and Carrying Capacity of Clustered Mining Area in the Cement City of South India","authors":"E. Kumar, T. Subramani, P. Gopinathan","doi":"10.1002/ldr.5501","DOIUrl":"https://doi.org/10.1002/ldr.5501","url":null,"abstract":"In today's global context, sustainability is a crucial factor for both emerging and established industries, including mining. The sector significantly affects social, economic, and environmental dimensions, creating job opportunities that can boost regional income while also contributing to adverse environmental consequences such as air and water pollution, land degradation, and soil contamination. This study employs dynamic modelling and evaluation techniques to examine the interplay between social, economic, and environmental factors, focusing on the sustainability of mining in Ariyalur district, Tamil Nadu. The findings indicate that Ariyalur district has achieved a nearly optimal state of sustainability, with the sustainable development index rising from 0.880 in 2016–0.921 by 2030. The sustainable development index intends to provide a holistic view on the social, economic, and environmental status of the region. This increase underscores the potential for enhanced carrying capacity in the region, allowing for future mineral production without compromising sustainability. These results provide valuable insights for policymakers and industry stakeholders aiming to balance economic growth with environmental stewardship. The proposed model serves as a framework for evaluating sustainability across various industries, highlighting the importance of integrated approaches in resource management.","PeriodicalId":203,"journal":{"name":"Land Degradation & Development","volume":"55 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143124896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Agro-Forestry Integrated Management of Karst Rocky Desertification Control: The Model Establishment and Practices in South China

IF 4.7 2区农林科学

Land Degradation & Development Pub Date : 2025-02-04 DOI: 10.1002/ldr.5503

Maoyin Sheng, Chunmei Yang, Linjiao Wang

{"title":"Agro-Forestry Integrated Management of Karst Rocky Desertification Control: The Model Establishment and Practices in South China","authors":"Maoyin Sheng, Chunmei Yang, Linjiao Wang","doi":"10.1002/ldr.5503","DOIUrl":"https://doi.org/10.1002/ldr.5503","url":null,"abstract":"Karst rocky desertification (KRD) has become the most serious ecological environmental problem in South China. Since 2008, the Chinese government has implemented a special project for KRD control. Because there are large populations in KRD areas of South China who need to survive, KRD control must not only pay attention to the ecological effects of vegetation restoration but also take into account the economic benefits and industrial effects of the local populations' survival needs. Agro-forestry integrated management can produce remarkable economic effects in vegetation restorations and can play an important role in KRD control. In this review, firstly, the KRD hazards and control in South China were reviewed. The features and advantages of agro-forestry integrated management were concluded. Then, based on a typical case in South China, the model establishment and practice of agro-forestry integrated management for KRD control were introduced. The case results showed that agro-forestry integrated management achieved remarkable ecological and economic benefits in KRD control. Finally, the existing challenges and their optimization strategies of the agro-forestry integrated management for KRD control were provided. This review provides important clues for scientific KRD control and is of great significance for the sustainable development of the karst region in South China.","PeriodicalId":203,"journal":{"name":"Land Degradation & Development","volume":"43 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143124895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Global Perspectives on Lead Contamination and Health Risks in Surface Water, Rice Grains, and Soils 地表水、米粒和土壤中铅污染与健康风险的全球视角

IF 4.7 2区农林科学

Land Degradation & Development Pub Date : 2025-02-04 DOI: 10.1002/ldr.5510

Amit Kumar, Vinod Kumar, Monika Thakur, Kirpal Singh, Rakesh Jasrotia, Rupesh Kumar, Maja Radziemska

{"title":"Global Perspectives on Lead Contamination and Health Risks in Surface Water, Rice Grains, and Soils","authors":"Amit Kumar, Vinod Kumar, Monika Thakur, Kirpal Singh, Rakesh Jasrotia, Rupesh Kumar, Maja Radziemska","doi":"10.1002/ldr.5510","DOIUrl":"https://doi.org/10.1002/ldr.5510","url":null,"abstract":"Lead (Pb), a pervasive and highly toxic metal, and poses significant environmental and health risks due to its extensive biogeochemical cycling, driven by anthropogenic activities. This review evaluates the health hazards allied with Pb contamination in surface water bodies, soils, and rice grains, based on a comprehensive analysis (2015–2024) of 118, 133, and 102 literature studies, respectively. The year-wise assessment of Pb concentration in surface water bodies and soils frequently exceeded their permissible limits in 2015, 2017, 2018, 2019, 2020, and 2022. However, the mean Pb concentration in rice grains consistently surpassed the Codex Alimentarius limit (2.5 μg/g) across the analyzed years. Geographically, Bangladesh, India, Pakistan, and China surpassed their limits for surface water bodies, rice grains and soils, emphasizing regional vulnerabilities. Health risk analysis indicated hazard quotient values exceeding one for children and adults in surface water bodies and rice grains, exhibiting significant non-carcinogenic risks. In soils, dermal exposure identified as the predominant pathways contributing to health hazard followed by ingestion, while inhalation presented the lower risk. These findings emphasize the imperative necessitate for implementing strict regulatory frameworks and preventive measures to mitigate Pb contamination in the environment and minimize its potential health impacts. This study advances understanding of Pb exposure pathways and risks, offering valuable insights for targeted mitigation strategies and public health interventions.","PeriodicalId":203,"journal":{"name":"Land Degradation & Development","volume":"10 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143124396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Historical Variation in Carbon Fractions in Permafrost Peatland and Its Effects on Peatland Carbon Pool

IF 4.7 2区农林科学

Land Degradation & Development Pub Date : 2025-02-04 DOI: 10.1002/ldr.5497

Jinxin Cong, Guangxin Li, Dongxue Han, Guoping Wang, Chuanyu Gao

{"title":"Historical Variation in Carbon Fractions in Permafrost Peatland and Its Effects on Peatland Carbon Pool","authors":"Jinxin Cong, Guangxin Li, Dongxue Han, Guoping Wang, Chuanyu Gao","doi":"10.1002/ldr.5497","DOIUrl":"https://doi.org/10.1002/ldr.5497","url":null,"abstract":"Permafrost peatlands store high amount of soil carbon. These developed on permafrost layers, which are being endangered increasingly by climate change and wildfires. However, limited data exist on the variation in carbon fractions and their effects on the stability of permafrost peatland carbon pools, despite that carbon fractions are widely used in other ecosystems. Here, we considered that peat soils consist of undecomposed plant litter and separated these into five carbon fractions: macro plant residue carbon (MPRC), coarse particulate organic carbon (cPOC), free particulate organic carbon (fPOC), occluded particulate organic carbon (oPOC), and mineral-associated organic carbon (MAOC). We analyzed the historical variation in these fractions over the past 700 years and their effects on the carbon pool in the Hongtu peatland (HT, northern Great Khingan Mountains, China). Our results showed that MPRC comprised 66.7% ± 7.6% of the carbon pool, whereas oPOC and MAOC accounted for less than 1%. Notably, fPOC, which represented 15.6% ± 6.5% of the total carbon, had a high aromatic content. It may serve as an important stable carbon fraction for the peatland carbon pool. Over the past 700 years, the decrease in proportion of MPRC and increase in proportions of cPOC and fPOC have resulted in significant increases in both carbon content and aromaticity. Warm/dry conditions and high-intensity fires reduced the accumulation rates (ARs) of MPRC while increasing those of fPOC and cPOC. The high organic carbon content in the HT peatland limited the availability of mineral elements and resulted in MAOC ARs of approximately 0.01 g m−2 yr−1. This was strongly influenced by the regional dust deposition. Cold climates and intense fires caused an increase in dust deposition, which also increased the MAOC ARs.","PeriodicalId":203,"journal":{"name":"Land Degradation & Development","volume":"47 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143124395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Soil Erosion Rates Via 210Pbex, 137Cs and USLE Model in El Rmel Watershed, NE Tunisia

IF 4.7 2区农林科学

Land Degradation & Development Pub Date : 2025-02-03 DOI: 10.1002/ldr.5488

Lilia Ben Cheikha, Amina Mabrouk El Asmi, Boubaker Askri, Mansour Oueslati, Foued Gharbi, Rafla Attia, Thabet Aouedi

{"title":"Soil Erosion Rates Via 210Pbex, 137Cs and USLE Model in El Rmel Watershed, NE Tunisia","authors":"Lilia Ben Cheikha, Amina Mabrouk El Asmi, Boubaker Askri, Mansour Oueslati, Foued Gharbi, Rafla Attia, Thabet Aouedi","doi":"10.1002/ldr.5488","DOIUrl":"https://doi.org/10.1002/ldr.5488","url":null,"abstract":"Soil erosion is a severe environmental and agricultural phenomenon which can be accelerated with climate change and land use, particularly in the Mediterranean region. In Tunisia, studies on the spatial distribution of erosion and deposition patterns can help to effectively implement soil and water conservation practices. Accordingly, the main objective of this research was to estimate soil erosion rates in two cultivated soils (SE1 and SE2), at El Rmel watershed of northeastern Tunisia. Three different time scales were observed via three tools, the 137Cs, the 210Pbex radioisotopes and the USLE model. The FRN's conversion mass balance model 2 (MBM2) was used to convert activities into erosion rates. Based on the 137Cs, 210Pbex, and USLE model, the mean erosion rates were, respectively, 37, 52, and 33 t ha−1 year−1, at the cereal cultivated SE1 site and 4, 9, and 6 t ha−1 year−1, at the olive tree cultivated SE2 site. It is supposed that the difference in time scale expressed by the three methods (100 years by 210Pbex, 60 years by 137Cs, and 40 years by USLE), may have had a notable impact on the discrepancy in estimated erosion rates. The mean farm slope for SE1 and SE2 were, respectively, 14% and 8% and tillage was through three operations per year. Furthermore, the cereal crops site characterized by steep slopes show much higher erosion rates. Consequently, planting olive trees will be very helpful in reducing soil erosion and will be of great impact either environmentally and/or economically.","PeriodicalId":203,"journal":{"name":"Land Degradation & Development","volume":"77 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143077294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Soil Aggregate Stability and Characteristics of Nitrogen, Phosphorus, and Potassium Contents in Cut Slope Soils With Different Aspects in Plateau Areas

IF 4.7 2区农林科学

Land Degradation & Development Pub Date : 2025-02-02 DOI: 10.1002/ldr.5485

Ziye Xu, Meihua Sheng, Shenghao Ai, Qinqing Yang, Zhuojun Li, Tingting Chen, Jianing Kou, Yingwei Ai, Xiaoyan Ai

{"title":"Soil Aggregate Stability and Characteristics of Nitrogen, Phosphorus, and Potassium Contents in Cut Slope Soils With Different Aspects in Plateau Areas","authors":"Ziye Xu, Meihua Sheng, Shenghao Ai, Qinqing Yang, Zhuojun Li, Tingting Chen, Jianing Kou, Yingwei Ai, Xiaoyan Ai","doi":"10.1002/ldr.5485","DOIUrl":"https://doi.org/10.1002/ldr.5485","url":null,"abstract":"Slope aspects can affect the soil-forming process. The implementation of road construction projects in plateau regions has resulted in the formation of numerous cut slopes. However, the soil aggregate stability and the characteristics of soil nitrogen (N), phosphorus (P), and potassium (K) nutrients under different cut slope aspects (east-facing slope (EFS), west-facing slope (WFS), south-facing slope (SFS) and north-facing slope (NFS)) are still unclear. In this context, the present study aims to assess the characteristics and influencing factors of soil aggregate stability, as well as N, P, and K contents, under different slope aspects in typical cut slope soils with the four different aspects in the southwestern plateau of China. In addition, the relationships of the soil aggregate stability with the soil N, P, and K contents were further explored in this study. The results showed significant differences in the soil aggregate stability (MWD, mean weight diameter) between the four slope aspects. The MWD values of the WFS and SFS were 1.18 and 1.16, respectively, which were significantly higher than those of the EFS and NFS (p < 0.05). Large macroscopic aggregates (LMA) showed the greatest contribution to the MWD values. The soil total phosphorus (TP), total nitrogen (TN), total potassium (TK), alkali-hydrolyzed nitrogen (AN), available phosphorus (AP), available potassium (AK), and soil organic carbon (SOC) contents showed significant differences between the four slope aspects and soil particle sizes. However, comparatively lower SOC contents were observed in the silt and clay fraction (SCA). The SOC contents and soil pH were the major factors influencing the LMA and SCA, which, in turn, affected the soil aggregate stability and contents of N, P, and K. The current study provides a useful reference for improving the quality of cut slope soils.","PeriodicalId":203,"journal":{"name":"Land Degradation & Development","volume":"3 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143077295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0