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Given that farmland serves as a strategic resource to ensure national food security, blind emphasis on the improvement of food production capacity can lead to soil overutilization and impair other soil functions. Hence, the evaluation of soil health (SH) should comprehensively take soil productivity and ecological environmental effects into account. In this study, five functions from the perspective of functional soil management were summarized, including primary productivity, provision and cycling of nutrients, the provision of functional and intrinsic biodiversity, water purification and regulation, and carbon sequestration and regulation. For each soil function, in view of the natural and ameliorable conditions affecting SH, basic indicators were selected from the two aspects of inherent and dynamic properties, and restrictive indicators were chosen considering the external properties or environmental elements, with the minimum limiting factor method coupled with weighted linear model. The new evaluation system was tested and verified in Yixing City, China. The healthy and optimally functional soils were concentrated in the northeast and mid-west of Yixing City, whereas unhealthy soils were predominant in the south and around Taihu Lake. The main limitations to SH improvement included cation exchange capacity, nutrient elements, and soluble carbon. The SH evaluation method was verified using the crop performance validation method, and a positive correlation was noted between food production stability index and soil health index, indicating that the evaluation system is reasonable.
Rui Zhao; Kening Wu. Soil Health Evaluation of Farmland Based on Functional Soil Management—A Case Study of Yixing City, Jiangsu Province, China. Agriculture 2021, 11, 583 .
AMA StyleRui Zhao, Kening Wu. Soil Health Evaluation of Farmland Based on Functional Soil Management—A Case Study of Yixing City, Jiangsu Province, China. Agriculture. 2021; 11 (7):583.
Chicago/Turabian StyleRui Zhao; Kening Wu. 2021. "Soil Health Evaluation of Farmland Based on Functional Soil Management—A Case Study of Yixing City, Jiangsu Province, China." Agriculture 11, no. 7: 583.
Given that cultivated land serves as a strategic resource to ensure national food security, blind emphasis on improvement of food production capacity can lead to soil overutilization and impair other soil functions. Therefore, we took Heilongjiang province as an example to conduct a multi-functional evaluation of soil at the provincial scale. A combination of soil, climate, topography, land use, and remote sensing data were used to evaluate the functions of primary productivity, provision and cycling of nutrients, provision of functional and intrinsic biodiversity, water purification and regulation, and carbon sequestration and regulation of cultivated land in 2018. We designed a soil function discriminant matrix, constructed the supply-demand ratio, and evaluated the current status of supply and demand of soil functions. Soil functions demonstrated a distribution pattern of high grade in the northeast and low grade in the southwest, mostly in second-level areas. The actual supply of primary productivity functions in 71.32% of the region cannot meet the current needs of the population. The dominant function of soil in 34.89% of the area is water purification and regulation, and most of the cultivated land belongs to the functional balance region. The results presented herein provide a theoretical basis for optimization of land patterns and improvement of cultivated land use management on a large scale, and is of great significance to the sustainable use of black soil resources and improvement of comprehensive benefits.
Rui Zhao; Junying Li; Kening Wu; Long Kang. Cultivated Land Use Zoning Based on Soil Function Evaluation from the Perspective of Black Soil Protection. Land 2021, 10, 605 .
AMA StyleRui Zhao, Junying Li, Kening Wu, Long Kang. Cultivated Land Use Zoning Based on Soil Function Evaluation from the Perspective of Black Soil Protection. Land. 2021; 10 (6):605.
Chicago/Turabian StyleRui Zhao; Junying Li; Kening Wu; Long Kang. 2021. "Cultivated Land Use Zoning Based on Soil Function Evaluation from the Perspective of Black Soil Protection." Land 10, no. 6: 605.
Urbanization is the development trend of all countries in the world, but it has caused considerable ecological problems that need to be alleviated by building ecological security patterns. This study took Ningbo as an example to construct and optimize an ecological security pattern. We analyzed land use types, normalized difference vegetation index, and landscape connectivity for ecological sources selection. In constructing the resistance surface, we considered natural and socio-economic factors. On this basis, we identified ecological corridors based on a minimum cumulative resistance model. Finally, the ecological security pattern was optimized through space syntax. Results showed that Ningbo has 18 ecological sources, with an area of 3051.27 km2 and 29 ecological corridors, with a length of 1172.18 km. Among them, 11 are first-level, 10 are second-level, and 8 are third-level corridors. After optimization, the area and protection cost of the ecological security pattern were significantly reduced, which can effectively alleviate the trade-off between ecological protection and economic development. This research can provide a reference for the construction and optimization of ecological security patterns and has reference significance for ecological protection in rapidly urbanized areas.
Yu Han; Chaoyue Yu; Zhe Feng; Hanchu Du; Caisi Huang; Kening Wu. Construction and Optimization of Ecological Security Pattern Based on Spatial Syntax Classification—Taking Ningbo, China, as an Example. Land 2021, 10, 380 .
AMA StyleYu Han, Chaoyue Yu, Zhe Feng, Hanchu Du, Caisi Huang, Kening Wu. Construction and Optimization of Ecological Security Pattern Based on Spatial Syntax Classification—Taking Ningbo, China, as an Example. Land. 2021; 10 (4):380.
Chicago/Turabian StyleYu Han; Chaoyue Yu; Zhe Feng; Hanchu Du; Caisi Huang; Kening Wu. 2021. "Construction and Optimization of Ecological Security Pattern Based on Spatial Syntax Classification—Taking Ningbo, China, as an Example." Land 10, no. 4: 380.
Under the task requirements of China’s 3rd national land survey on the grade determination of cultivated land, research on a reasonable and unified survey and evaluation system of cultivated land quality (CLQ) is of great importance. From the three dimensions of agricultural climate, production potential, and health status components of cultivated land, six factors are selected in this study to construct a set of simple, practicable, and operable county-level CLQ survey and evaluation system. These factors are climate conditions of cultivated land, soil characteristics, tillage conditions, the attributes of cultivated land type, environmental conditions, and biological activity. The developed survey and evaluation system meets the demands of national engineering for the inclusion and coordination of multiple departments based on the current evaluation system and evaluation methodology of all relevant land administrative departments. Wen County, Henan Province is used for field verification and evaluation. Results demonstrate that the average quality index of cultivated land in Wen County is 2196.33, ranging from 660.70 to 2802.96 with the largest area of the first-class and second-class land accounting for 20.98% and 52.61% of the county’s cultivated land, respectively; the third-class and fourth-class land, 12.63% and 13.78%. The obvious regional differentiation characteristics are presented along the boundary of Qingfengling with the quality of northern cultivated land higher than that in the south. The comparison with the results of the national utilization gradation in 2018 infers that they are in accordance with the distribution of CLQ, which bears a significant positive correlation trend with the measured grain output of the field. The constructed evaluation system serves as a rewarding attempt of a unified survey and evaluation of CLQ at the county scale to reflect the production capacity of local crops, realize the sharing of data platforms, save manpower and capital investment, improve the practical connection of supervision and management of cultivated land protection in different departments, and meet the requirements of current cultivated land protection and management.
Rui Zhao; Kening Wu; Xiaoliang Li; Nan Gao; Mingming Yu. Discussion on the Unified Survey and Evaluation of Cultivated Land Quality at County Scale for China’s 3rd National Land Survey: A Case Study of Wen County, Henan Province. Sustainability 2021, 13, 2513 .
AMA StyleRui Zhao, Kening Wu, Xiaoliang Li, Nan Gao, Mingming Yu. Discussion on the Unified Survey and Evaluation of Cultivated Land Quality at County Scale for China’s 3rd National Land Survey: A Case Study of Wen County, Henan Province. Sustainability. 2021; 13 (5):2513.
Chicago/Turabian StyleRui Zhao; Kening Wu; Xiaoliang Li; Nan Gao; Mingming Yu. 2021. "Discussion on the Unified Survey and Evaluation of Cultivated Land Quality at County Scale for China’s 3rd National Land Survey: A Case Study of Wen County, Henan Province." Sustainability 13, no. 5: 2513.
There are complex tradeoffs and synergies between ecosystem services. At the regional scale, some ecosystem services play a more critical role in regional ecological security and social development. Therefore, it is necessary to identify key ecosystem services and prioritize their protection and management to ensure their sustainable and effective delivery in a region. This paper proposes a set of research schemes that comprehensively examine the supply, trade-off, and demand of ecosystem services, using the city belt along the Chaobai River in north China as an example for empirical research. Demarcating a 1km×1km area, we first analyze the spatial-temporal supply patterns of Net Primary Productivity (NPP), Water Yield (WY), Soil Retention (SR), Sand Retention (SAR), and Habitat Quality (HQ) from 2010 to 2015 using the CASA, InVEST, USLE, RWEQ and InVEST models, respectively. Thereafter, we define the Regional Key Ecosystem Service (RKES) through regional reality and Spearman correlation analysis among the five ecosystem services. Finally, based on the disparity between the supply and demand of the RKES, we develop a land zoning approach and propose targeted zoning management measures. The results show that WY was the RKES in the study area. The demand for WY did not exceed supply, and the supply and demand were always in a state of mismatch. The stable area with surplus supply and demand of WY was designated as an Ecological Protected Area, a core area to guarantee the RKES. In general, our scheme can be targeted to address the protection of RKES from the perspective of land management. This is of great significance for ensuring regional ecological security and sustainable use of ecosystem services, and could be used to inform the formulation of ecological protection policies.
Xiao Li; Xiao Yu; Kening Wu; Zhe Feng; Yanan Liu; Xiaoliang Li. Land-use zoning management to protecting the Regional Key Ecosystem Services: A case study in the city belt along the Chaobai River, China. Science of The Total Environment 2020, 762, 143167 .
AMA StyleXiao Li, Xiao Yu, Kening Wu, Zhe Feng, Yanan Liu, Xiaoliang Li. Land-use zoning management to protecting the Regional Key Ecosystem Services: A case study in the city belt along the Chaobai River, China. Science of The Total Environment. 2020; 762 ():143167.
Chicago/Turabian StyleXiao Li; Xiao Yu; Kening Wu; Zhe Feng; Yanan Liu; Xiaoliang Li. 2020. "Land-use zoning management to protecting the Regional Key Ecosystem Services: A case study in the city belt along the Chaobai River, China." Science of The Total Environment 762, no. : 143167.
Soil health has been a major focus of research by international scholars because it is an important factor that supports human survival and development. However, few scholars have performed bibliometric analyses of research on soil health. This study investigated the current research status and development characteristics of soil health. We performed a bibliometric analysis of documents on soil health from 1999 to 2018 in the Web of Science Core Collection. The bibliometric analysis tools, CiteSpace and HistCite software, were applied. A total of 1629 documents on soil health in the Web of Science Core Collection were identified. From the research status of soil health, the number of publications will continue to increase. Most of the research institutions examining soil health are located in the USA, and there is little cooperation and communication among countries, neither do research institutions in this field. Each country has its own research labs while lab cooperation within individual countries is relatively close. Most documents on the research of soil health have been published in the journal Applied Soil Ecology. In addition, research directions are expanding from the basic study of soil production, soil health indicators, and soil pollution to the comprehensive study of soil ecosystem. Bibliometric analysis tools, CiteSpace and HistCite software, provide a comprehensive approach for making predictions regarding trends in the field. This method was used in this study to identify the hotspots, frontiers, and future development of soil health to provide guidance for future research.
Yanan Liu; Kening Wu; Rui Zhao. Bibliometric analysis of research on soil health from 1999 to 2018. Journal of Soils and Sediments 2019, 20, 1513 -1525.
AMA StyleYanan Liu, Kening Wu, Rui Zhao. Bibliometric analysis of research on soil health from 1999 to 2018. Journal of Soils and Sediments. 2019; 20 (3):1513-1525.
Chicago/Turabian StyleYanan Liu; Kening Wu; Rui Zhao. 2019. "Bibliometric analysis of research on soil health from 1999 to 2018." Journal of Soils and Sediments 20, no. 3: 1513-1525.
The implementation of the Beijing, Tianjin, and Hebei coordinated development strategy has seriously increased the influence of land use and urban traffic. Thus, understanding the coordination between urban land and transportation systems is important for the efficient and sustainable development of cities, especially in this rapidly urbanizing era. Urban–industrial land and highway networks are, respectively, primary types of urban land and transportation systems, and have significant impacts on social and economic development. However, limited studies have been conducted to examine the relationships between urban–industrial land and highway networks. Therefore, this paper aims to examine the coupling coordination relationship between urban–industrial land use efficiency, and the accessibility of the highway networks of cities. Specifically, in the context of the Beijing–Tianjin–Hebei (BTH) urban agglomeration, the coupling coordination between urban-industrial land use efficiency and accessibility of the highway traffic network was empirically analyzed. The results show that: (i) The differences in urban-industrial land use efficiency in the BTH region are significant. Capital cities in the BTH urban agglomeration have higher economic, social, and comprehensive efficiency, while in industrial cities, the use of urban–industrial land should prioritize ecological and environmental issues. (ii) Because of its good geographical location Beijing has the best accessibility, with an accessibility index of 1.416, while Qinhuangdao had the lowest accessibility index of 0.039. (iii) In most BTH cities, the urban-industrial comprehensive land use level has fallen behind the highway network development level. The results of this study can provide references for the coordinated development of the BTH urban agglomeration.
Chenxi Li; Xing Gao; Bao-Jie He; Jingyao Wu; Kening Wu. Coupling Coordination Relationships between Urban-industrial Land Use Efficiency and Accessibility of Highway Networks: Evidence from Beijing-Tianjin-Hebei Urban Agglomeration, China. Sustainability 2019, 11, 1446 .
AMA StyleChenxi Li, Xing Gao, Bao-Jie He, Jingyao Wu, Kening Wu. Coupling Coordination Relationships between Urban-industrial Land Use Efficiency and Accessibility of Highway Networks: Evidence from Beijing-Tianjin-Hebei Urban Agglomeration, China. Sustainability. 2019; 11 (5):1446.
Chicago/Turabian StyleChenxi Li; Xing Gao; Bao-Jie He; Jingyao Wu; Kening Wu. 2019. "Coupling Coordination Relationships between Urban-industrial Land Use Efficiency and Accessibility of Highway Networks: Evidence from Beijing-Tianjin-Hebei Urban Agglomeration, China." Sustainability 11, no. 5: 1446.
Industrial spatial agglomeration is the most prominent geographical feature of economic activities. This paper examined the current situation of manufacturing industry agglomeration in Hebei Province by using the industrial location quotient and exploratory spatial data analysis. The results showed that (1) the industrial location quotient of 11 cities’ 31 manufacturing industries in Hebei Province indicated that there was a significant difference among manufacturing industry agglomeration of the 11 cities in Hebei Province. (2) Global spatial autocorrelation of manufacturing industry agglomeration showed that TA (Manufacture of Textile, Apparel), T (Manufacture of Textile), PFM (Manufacture and Processing of Ferrous Metals), CF (Manufacture of Chemical Fibre), LFF (Manufacture of Leather, Fur, Feather and Its Products and Footwear), AAE (Manufacture of Articles for Culture, Arts and Crafts, Education, Sport Activities and Entertainment Goods) and RP (Manufacture of Rubber and Plastic) showed agglomeration characteristics. (3) According to the industrial location quotient and local spatial autocorrelation, the spatial cluster of manufacturing industry agglomeration in Hebei Province was divided into “Diffusion Centre”, “Primary Diffusion Centre”, “Polarization Centre” and “Less Developed Area”.
Chenxi Li; Kening Wu; Xiangyu Gao. Manufacturing industry agglomeration and spatial clustering: Evidence from Hebei Province, China. Environment, Development and Sustainability 2019, 22, 2941 -2965.
AMA StyleChenxi Li, Kening Wu, Xiangyu Gao. Manufacturing industry agglomeration and spatial clustering: Evidence from Hebei Province, China. Environment, Development and Sustainability. 2019; 22 (4):2941-2965.
Chicago/Turabian StyleChenxi Li; Kening Wu; Xiangyu Gao. 2019. "Manufacturing industry agglomeration and spatial clustering: Evidence from Hebei Province, China." Environment, Development and Sustainability 22, no. 4: 2941-2965.
As an important constitute of land consolidation, high-standard basic farmland construction is an important means to protect the quantity, quality and ecological environment of cultivated land. Its target not only lies in the increase of cultivated land quantity, but also the improvement of cultivated land quality, agricultural production conditions and ecosystem environments. In the present study, the quality evaluation method and construction arrangement of cultivated land were explored to facilitate the process of decision-making and implementation for high-standard basic farmland construction (HSBFC) with administrative village as the unit. Taking the land comprehensive improvement project area in Quzhou County, Handan City, Hebei Province as a case study, the whole process of the study comprised of three steps: 1) establishment of the evaluation model of cultivated land quality uniformity based on regional optimum cultivated land quality, and construction of the uniformity evaluation index system from the aspects of soil fertility quality, engineering quality, spatial quality and eco-environment quality, according to the new concept of cultivated land quality; 2) calculation of cultivated land quality uniformity by grading indicators, assigning scores and weighting sums, exploring the local homogenization characteristics of regional cultivated land quality through spatial autocorrelation analysis, and analyzing the constraints and transformative potential of barrier factors; 3) arrangement of HSBFC according to the principle of concentration, continuity and priority to the easy operation. The results revealed that the value of farmland quality uniformity for the administrative villages in the study area was between 7.76 and 21.96, and there was a difference between various administrative villages. The regional spatial autocorrelation patterns included High-High (HH), Low-Low (LL), High-Low (HL) and Low-High (LH). These indicate that regional cultivated land quality has local homogenization characteristics. The most restrictive factors in the study area were the medium and low transformation difficulty indexes, including soil organic matter content, farmland shelterbelt network density, field regularity and scale of the field. In addition, there were also high transformation difficulty indicators in some areas, such as sectional configuration. The project area was divided into four partitions: major construction area, secondary construction area, general construction area, and conditional construction area. The cultivated land area of each subarea was 1538.85 ha, 1224.27 ha, 555.93 ha, and 1666.63 ha, respectively. This comprised of 30.87%, 24.56%, 11.15% and 33.42% of the total project area, respectively. The evaluation model and index system could satisfy the evaluation of farmland quality and diagnosis of obstacle factors to facilitate the subsequent construction decision. The present study provides reference for the practice of regional HSBFC, and a new feasible idea and method for related studies.
Wen Song; Kening Wu; Huafu Zhao; Rui Zhao; Ting Li. Arrangement of High-standard Basic Farmland Construction Based on Village-region Cultivated Land Quality Uniformity. Chinese Geographical Science 2018, 29, 325 -340.
AMA StyleWen Song, Kening Wu, Huafu Zhao, Rui Zhao, Ting Li. Arrangement of High-standard Basic Farmland Construction Based on Village-region Cultivated Land Quality Uniformity. Chinese Geographical Science. 2018; 29 (2):325-340.
Chicago/Turabian StyleWen Song; Kening Wu; Huafu Zhao; Rui Zhao; Ting Li. 2018. "Arrangement of High-standard Basic Farmland Construction Based on Village-region Cultivated Land Quality Uniformity." Chinese Geographical Science 29, no. 2: 325-340.
The original version of this article unfortunately contains mistakes.
Chenxi Li; Kening Wu; Jingyao Wu. Correction to: A bibliometric analysis of research on haze during 2000-2016. Environmental Science and Pollution Research 2017, 25, 15268 -15268.
AMA StyleChenxi Li, Kening Wu, Jingyao Wu. Correction to: A bibliometric analysis of research on haze during 2000-2016. Environmental Science and Pollution Research. 2017; 25 (15):15268-15268.
Chicago/Turabian StyleChenxi Li; Kening Wu; Jingyao Wu. 2017. "Correction to: A bibliometric analysis of research on haze during 2000-2016." Environmental Science and Pollution Research 25, no. 15: 15268-15268.
As one of the bibliometric analysis tools, CiteSpace software was applied to quantitatively and visually evaluate global scientific documents of research on haze from 2000 to 2016. Five thousand six hundred six documents from the Science Citation Index Expanded (SCI-Expanded) and Social Science Citation Index (SSCI) of the Web of Science database were statistically analyzed and examined. The distributions on authorship, countries/territories, institutes, and keywords were generated. The amount of publications has increased nearly for the past 17 years. The most productive author was Li J. with 46 articles. The publications on haze research were primarily originated from the USA, China, Germany, and France. By synthetically analyzing the keywords, the dominant hot spots of haze research could be concluded as “aerosol,” “atmosphere,” “particle,” “PM2.5,”and “air quality.”
Chenxi Li; Kening Wu; Jingyao Wu. A bibliometric analysis of research on haze during 2000–2016. Environmental Science and Pollution Research 2017, 24, 24733 -24742.
AMA StyleChenxi Li, Kening Wu, Jingyao Wu. A bibliometric analysis of research on haze during 2000–2016. Environmental Science and Pollution Research. 2017; 24 (32):24733-24742.
Chicago/Turabian StyleChenxi Li; Kening Wu; Jingyao Wu. 2017. "A bibliometric analysis of research on haze during 2000–2016." Environmental Science and Pollution Research 24, no. 32: 24733-24742.