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Influence of Climate and socio-economic factors on the Spatio-Temporal Variability of Soil Organic Matter: A Case Study of Central Heilongjiang Province, China

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Journal of Integrative Agriculture 2014年第7期13卷 1486-1500页

作者： SHI Shu-qin CAO Qi-wen YAO Yan-min TANG Hua-jun YANG Peng WU Wen-bin XU Heng-zhou LIU Jia LI Zheng-guo School of Management Tianjin Polytechnic University Key Laboratory of Agri-Informatics Ministry of Agriculture/Institute of Agricultural Resources & Regional Planning Chinese Academy of Agricultural Sciences College of Management Tianjin University

For the scientific management of farmland, it is significant to understand the spatio-temporal variability of soil organic matter and to study the influences of related factors. Using geostatistical theory, GIS spatial analysis, trend analysis and a Geographically Weighted Regression （GWR） model, this study analyzed the response of soil organic matter to climate and socio-economic factors in central Heilongjiang Province during the past 25 years. Second soil survey data of China for 1979-1985, 2005 field sampling data, climate observations and socio-economic data for 1980-2005 were analyzed. First, soil organic matter in 2005 was spatially interpolated using the Co-Kriging method along with auxiliary data sets of soil type and pH. The spatio-temporal variability was then studied by comparison with the 1980s second soil census data. Next, the temporal trends in climate and socio-economic factors over the past 25 years were investigated. Finally, we examined the variation of the response of soil organic matter to climate and socio-economic factors using the GWR model spatially and temporally. The model showed that 53.82% area of the organic matter content remained constant and 29.39% has decreased during the past 25 years. The impact of precipitation on organic matter content is mainly negative, with increasing absolute values of the regression coefficient. The absolute value of regression coefficient of annual average temperature has decreased, and more areas are now under its negative effects. In addition, the areas of positive regression coefficient of annual sunshine hours have northward shifted, with the increasing absolute value of positive coefficient and decreasing absolute value of negative coefficient. The areas of positive regression coefficient of mechanized farming as a socio-economic factor have westward shifted, with the increasing absolute value of negative coefficient and decreasing absolute value of positive coefficient. The area of regions with the positive regression coefficient of irrigation ha

关键词： soil organic matter climate socio-economic factors GWR Heilongjiang Province

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Impacts of socio-economic factors on sediment yield in the Upper Yangtze River

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Journal of Geographical Sciences 2011年第2期21卷 359-371页

作者： DU Jun SHI Changxing FAN Xiaoli ZHOU Yuanyuan Key Laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources Research CAS Beijing 100101 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

In recent years, the role of human activities in changing sediment yield has become more apparent for the construction of hydraulic engineering and water conservation projections in the Upper Yangtze River, but it has not been evaluated at the macro scale. Taking Sichuan Province and Chongqing City as an example, this paper studies the relationship between socio-economic factors and sediment yield in the Upper Yangtze River based on section data in 1989 and 2007. The results show that sediment yield is significantly correlated with population density and cultivated area, in which the former appears to be more closely related to sediment yield. Moreover, in the relation of sediment yield vs. population density, a critical value of population density exists, below which the sediment yield increases with the increase of population density and over which the sediment yield increases with the decrease of population density. The phenomenon essentially reflects the influence of natural factors, such as topography, precipitation and soil property, and some human activities on sediment yield. The region with a higher population density than critical value is located in the east of the study area and is characterized by plains, hills and low mountains, whereas the opposite is located in the west and characterized by middle and high mountains. In the eastern region, more people live on the lands with a low slope where regional soil erosion is slight; therefore, sediment yield is negatively related with population density. In contrast, in the western region, the population tends to aggregate in the areas with abundant soil and water resources which usually lead to a higher intensity of natural erosion, and in turn, high-intensity agricultural practices in these areas may further strengthen local soil erosion. It is also found that population tends to move from the areas with bad environment and high sediment yield to the areas with more comfortable environment and less sediment yield. The natural factors have greater influen

关键词： the Upper Yangtze River socio-economic factors human activities sediment yield

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Spatial Heterogeneity Association of HIV Incidence with socio-economic factors in Zimbabwe

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Journal of Geographical Research 2021年第3期4卷 51-60页

作者： Tawanda Manyangadze Moses J Chimbari Emmanuel Mavhura Geography Department Faculty of Science and EngineeringBindura University of Science EducationBag 1020BinduraZimbabwe School of Nursing and Public Health Department of Public Health Medicine University of KwaZulu-NatalDurbanSouth Africa

This study examined the spatial heterogeneity association of HIV incidence and socio-economic factors including poverty severity index,permanently employed females and males,unemployed females,percentage of poor households i.e.,poverty prevalence,night lights index,literacy rate,household food security,and Gini index at district level in Zimbabwe.A mix of spatial analysis methods including Poisson model based on original log likelihood ratios(LLR),global Moran’s I,local indicator of spatial association-LISA were employed to determine the HIV hotspots.Geographically Weighted Poisson Regression(GWPR)and semi-parametric GWPR(s-GWPR)were used to determine the spatial association between HIV incidence and socio-economic factors.HIV incidence(number of cases per 1000)ranged from 0.6(Buhera district)to 13.30(Mangwe district).Spatial clustering of HIV incidence was observed(Global Moran’s I=-0.150;Z score 3.038;p-value 0.002).Significant clusters of HIV were observed at district level.HIV incidence and its association with socio-economic factors varied across the districts except percentage of females unemployed.Intervention programmes to reduce HIV incidence should address the identified socio-economic factors at district level.

关键词： HIV and AIDS Spatial modelling Geographical weighted Poisson regression model socio-economic factors Zimbabwe

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factors in fluencing farmers' participation in crop intensification program in Rwanda

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Journal of Integrative Agriculture 2017年第6期16卷 1406-1416页

作者： Alphonse Nahayo Morris O.Omondi ZHANG Xu-hui LI Lian-qing PAN Gen-xing Stephen Joseph Institute of Resources Ecosystem and Environment of Agriculture Nanjing Agricultural University Nanjing 210095 P.R. China College of Agriculture Animal Science and Veterinary Medicine University of Rwanda Musanze P. O. Box 210 Rwanda University of New South Wales School of Material Science and Engineering Sydney NSW 2052 Australia

The crop intensification program（CIP）was introduced in Rwanda in 2007 by the Ministry of Agriculture and Animal Resources（MINAGRI）,Rwanda,as a solution to the land fragmentation,low use of agricultural inputs and low access to extension services.However,due to the voluntary nature of farmers’participation and their reluctance to participate,this study aimed at assessing the factors that influence their participation.Data were collected from 340 respondents through a household survey in Mayange and Rusarabuye sectors.Descriptive statistics and binary logistic regression model were used to analyze the data.Results show that the factors that significantly influenced the farmers’participation in the CIP include gender,non-farm income,farmland size,farming experience,land acquisition means,market access,trust and agro-ecological conditions.In fact,the non-farm income significantly increased the farmers’decisions to participate in the CIP（P〈0.001）as it eases the financial capital needed to invest in the CIP activities.On the land acquisition means,the farmers who inherited or bought the land positively and significantly participated in the CIP（P〈0.05）because they had the land tenure security.However,the participation in the CIP was hindered by inadequate irrigation and mechanization facilities,lack of farmers’participation in the CIP planning process,inadequate extension services,inadequate agricultural inputs and inadequate post-harvest technologies.Closer collaboration between farmers,local leaders,extension agents and agricultural service providers as well as the farmers’practical skills in irrigation and mechanization could enhance the participation to the program.Therefore,there is a need on the part of policymakers to empower farmers with adequate knowledge on better cropping practices and agricultural technologies through appropriate extension services and bottom-up based program.

关键词： chemical fertilizers crop intensification program extension services improved seeds post-harvest techniques institutional factors socio-economic factors constraints

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factors affecting the distribution of microplastics in soils of China

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Frontiers of Environmental Science & Engineering 2023年第9期17卷 157-176页

作者： Yin Liu Matthias CRillig Quan Liu Jingjing Huang Muhammad Amjad Khan Xiaohui Li Qin Liu Qingqing Wang Xuesong Su Linyi Lin Yang Bai Genmao Guo Yi Huang Yong Sik Ok Shan Hu Junfeng Wang Honggang Ni Qing Huang Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province/Center for Eco-Environmental Restoration Engineering of Hainan Province/State Key Laboratory of Marine Resource Utilization in South China Sea/College of Ecology and Environment Hainan UniversityHaikou 570228China Institute of Biology Ecology of PlantsFreie Universität Berlin/Berlin Brandenburg Institute of Advanced Biodiversity Research(BBIB)Berlin 14195Germany Hainan Inspection and Detection Center for Modern Agriculture Haikou 570100China Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural SciencesBeijing 100081China China College of Management and economics Tianjin UniversityTianjin 300072China College of Environmental Sciences and Engineering Peking UniversityBeijing 100871China Korea Biochar Research Center APRU Sustainable Waste Management Program&Division of Environmental Science and Ecological EngineeringKorea UniversitySeoul 02841Republic of Korea School of Urban Planning and Design Peking University Shenzhen Graduate SchoolShenzhen 518055China

Microplastics(MPs)are found worldwide in high abundance,posing a potential threat to ecosystems.Despite the ubiquity of MPs in the environment,very little is known about the regional distribution of MPs and underlying factors affecting this distribution in the field,which likely include human activity,but also features of the environment itself.Here,out of a total of 1157 datapoints investigated in 53 Chinese studies,9.68%datapoints were removed as outliers in the heterogeneity analysis.This review revealed that the abundance of MPs was highly heterogeneous.In addition,microplastic(MP)distribution maps based on China demonstrated that the highest abundance of MPs tended to occur near large rivers and central land affected by the intersection of two monsoons.The model-fitting and previous studies showed that MP abundance in China was correlated with longitude,agricultural mulching film usage per capita,temperature,and precipitation.However,due to the heterogeneity of MPs and the low matching degree between the current environmental data and the sampling points,this pattern was not as evident as reported in any single study.factors affecting the distribution of MPs can not be captured by linear relationships alone,and systematic selection of suitable environmental factors and further model optimization are needed to explore the cause of MP pollution in soil.Overall,this review revealed an uneven distribution of MPs and serves as a reference for model prediction to assess and control plastic pollution in natural soil environments.

关键词： Microplastic distribution Microplastic heterogeneity Effecting factors Agriculture socio-economic factors

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Analysis of Environmental and socio-economic Determinants Affecting Population Longevity Level at County Level in China

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Chinese Journal of Population,Resources and Environment 2005年第1期3卷 36-41页

作者： Lu Jiehua , Wang Hongbo 1 2 & Pan Yi 1 1. Institute of Population Research, Peking University, Beijing 100871, China 2. Department of sociology, University of California at Los Angeles, Los Angeles, USA. Institute of Population Research Peking University Beijing 100871 China Department of sociology University of California at Los Angeles Los Angeles United States

Based on the current literature, this paper is mainly intended to test whether environmental factors and socio-economic factors will have direct effect on the longevity at county level in China in order to determine the major determinants affecting local longevity level. Using the multi-regression model, we find the result that factors such as temperature, climate, longitude, type of soils, as well as type of agricultural food production play a major role in shaping the longevity at county level, and that socio- economic factors like infant mortality and gross death rate also have some direct impact on longevity, but the degree of impact is not as strong as the above environmental factors.

关键词： longevity socio-economic factors environmental factors

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Situational Analysis of Access to Essential Healthcare Services in Nigeria: Implication for Trans-Sectorial Policy Considerations in Addressing Health Inequities

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Health 2022年第5期14卷 553-575页

作者： Sunday Atobatele Oluomachukwu Omeje Oluwafisayo Ayodeji Faith Oisagbai Sidney Sampson Sydani Group Abuja Nigeria

Background: socioeconomic factors influence health outcomes and the distribution of health resources within and between countries globally. In Nigeria, there are various socio-economic factors that have been reported to be responsible for health inequities across the different geopolitical zones. Objective: To assess health inequities in relation to socio-economic factors that affect access to essential health care services in Nigeria, using family planning, maternal care, and childcare as indicators. Method: The study involved a cross-sectional secondary analysis of data from the 2018 Nigeria Demographic and Health Survey (NDHS) and a literature review of transdisciplinary approaches to addressing health inequities. Result: The overall result from the findings suggests a strong influence of geographical and socioeconomic factors in the distribution of healthcare services. Specifically, family planning services were more readily available and accessible in the Southern zones of Nigeria than in the Northern zone of Nigeria, which could be attributed to socio-cultural, religious, and access-related barriers. Results also showed that access to most maternal and child health care services was often skewed towards the southern zones, which could be due to the presence of more healthcare workers who provide these services coupled with higher access to maternal care, hence a higher uptake and utilization of maternal care services. Also, children in the northern zones had lesser odds of receiving basic and age-appropriate vaccination than those in other regions, which could be attributed to the supply-side disparities that exist between the northern and southern regions. Conclusion: This study concludes that level of educational attainment, wealth quintiles, as well as financial barriers, are the major socio-economic factors that influence access to maternal and childcare services.

关键词： Health Inequities socio-economic factors Family Planning Maternal Care Childcare

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Research Progress on the Relationship between Air Pollution and socio-economic Growth in China

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Meteorological and Environmental Research 2021年第6期12卷 1-6页

作者： Xiaoming CHUAI Lele DU Haixia ZHOU Safety and Emergency Management Research Center Henan Polytechnic UniversityJiaozuo 454000China Library of Henan Polytechnic University Jiaozuo 454000China

Air pollution is a hot issue studied by scholars all over the world.Academic circles generally believe that socio-economic factors such as extensive economic growth,unbalanced proportion of industrial structure and unreasonable energy consumption structure are the main"culprits"of serious air pollution in China.Therefore,the relationship between air pollution and socio-economic growth has very important theoretical and practical significance for air pollution prevention and control and promoting the sustainable and healthy development of cities.Through literature research and summary methods,this paper studies the severity and harmfulness of air pollution in China,and deeply studies the research progress of socio-economic influencing factors of air pollution,environmental Kuznets curve hypothesis of air pollution,decoupling relationship between air pollution and socio-economic growth,so as to provide useful reference for the prevention and control of air pollution.

关键词： Air pollution socio-economic factors Kuznets curve Decoupling theory Prevention and control countermeasures

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Regional distribution pattern of the invasive plant species in China

Regional distribution pattern of the invasive plant species ...

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“全国第五届青年植物生态学学术研讨会”暨“第二届植物生...

作者： Jian Liu, Shi-Chu Liang, Feng-Hong Liu, Ren-Qing Wang, Ming Dong (Laboratory of Quantitative Vegetation Ecology, Institute of Botany, the Chinese Academy of Sciences, Beijing 100093, P.R. China School of Life Sciences, Shandong University, Ji’nan 250100,P.R.China)

Plant invasions have been attracting increasingly extensive attention of ecologists for their worldwide environmental impacts and huge economical costs. Research on the characteristics of the recipient regions is essential for understanding the process of plant invasion. However, few previous studies on invasibility of habitats are on social factors although human activities are critical in the process of plant invasion. China is a vast country with mega-biodiversity and a long history of introduction of exotic plant species. These make China particularly vulnerable to invasive plant species. Currently, alien plant species are widespread in the country. Therefore the study of invasive plants in China is urgent in practice and theoretically important for developing invasion ecology. In present study we collected data of species richness of invasive plants in 31 provincial administrative unit of China and performed Spearman’s rank correlation between the species richness and possible natural and socio-economic factors. We found that the socio-economic factors (such as human density and GDP) correlated positively with the species richness of invasive plants in China. In conjunction with the natural and socio-economic correlations in the study of regional distribution pattern of the major invasive plants, we discussed the factors influencing the regional distribution pattern of the major invasive plants in China.

关键词： invasive plant species human activities socio-economic factors

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