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【Objective】The study aimed to explore the ecological security pattern of Kashi region to provide ecological guarantee for regional ecological security protection and sustainable development of oasis region. 【Method】The paper analyzed and identified ecological source sites based on Morphological Spatial Pattern Analysis model and landscape connectivity, applied Minimal Cumulative Resistance model and gravity model to identify and analyze ecological corridors connecting each ecological source site, and combined ecological break-point identification and ecological network analysis to enhance the regional ecological security pattern.【Result】 (i) The ecological patches in Kashi had a high area share and a good ecological safety foundation, but the large number of patches and large area differences led to a large fragmentation of ecological patches and a large ecological safety potential. (ii) The distribution of ecological patches, ecological source sites and core ecological source sites formed an obvious differentiated zoning, and 16 core ecological source sites were finally identified. (iii) 66 ecological corridors with a total length of 5693.356 kilometers were identified, and their role of connecting ecological source sites was good. (iv) The ecological security pattern of 'one source, one corridor, two zones, two belts, three cores and three axes' was proposed, which provided the priority for ecological security protection. 【Conclusion】The construction and restoration of ecological security pattern in Kashi prefecture was of great significance to regional ecological security. [ABSTRACT FROM AUTHOR]

[Objective] The purpose of this paper is to analyze the dynamic changes and driving forces of grassland resources in Huize county of Yunnan province. [ Method] Based on the remote sensing data of2009a and 2016a, the change and driving force of grassland resources in the study area were analyzed quantitatively by comprehensive dynamic change of grassland resources, geo-informatic spectrum and logistic re gression model with the township as the research scale. [ Result] From the data of 2009 - 2016, the comprehensive dynamic change of grass land resources was 5. 85%, in which Xinjie township ( 14. 21 % ) and Tianba township ( 14. 00%) were more drastic changes, Wuxing township (2. 53%) and Jinzhong town (3. 41 % ) were relatively stable; According to the geo-informatic spectrum, the increased patch area of grassland resources was 41 953. 43 hm², the decreased area was 20 818. 92 hm², and the net increase was 21 134. 51 hm², which the newly increased grassland resources mainly came from woodland and cultivated land, accounting for 56. 85%, and the decreased grassland resources mainly flowed to woodland and cultivated land, accounting for 52. 20% ; From the driving forces of grassland resources change, the driving forces of grassland resources increase were annual rainfall, distance from highway, slope 25° - 90° and per capita net income; The driving forces affecting the reduction of grassland resources were annual rainfall, slope 25° - 90° and distance from highway; The driving forces affecting the overall change of grassland resources were slope 25° - 90°, 15° - 25°, 6° - 15°, 2° - 6°, annual average rainfall, ele vation and distance from highway. [ Conclusion] This study can provide important basis for ecological environment protection and sustainable development of Huize county in the future. [ABSTRACT FROM AUTHOR]

[Objective] The present paper aimed to reveal the landscape pattern evolution and driving factors of karst rocky desertification area, and provide a reference for optimizing the land landscape pattern, rocky desertification control and regional sustainable development in the demonstration area. [Method] Taking the typical Karst Plateau Bijie Salaxi demonstration area as the research object, the remote sensing images of three key time periods were selected, including ETM in 2005, 2010 and OLI in 2015. 3 S technology and landscape index analysis method were employed to study landscape pattern and the driving factors. [Result] The main landscape of the study area was cultivated land, followed by shrub forest. The changes of landscape transfer were mainly manifested in the transformation from cultivated land to forest, grassland and construction land, which accounted for 73. 31 % and 24. 75 % of the cultivated land transfer respectively in 2010; By 2015, they accounted for 79. 80 % and 19. 99 % respectively. At the landscape type level, the fragmentation degree of cultivated land, forestland and shrub land was increasing, and the fragmentation degree of grassland and construction land increased first and then decreased. Except for the unused land, the landscape patch shape tended to be complicated. In the overall level of the landscape, the landscape of demonstration area had developed in the direction of fragmentation, complexity, discretization and homogenization in the last 10 years. [Conclusion] The implementation of rocky desertification control project, urbanization construction and land abandonment were the main factors leading to the change of landscape pattern. [ABSTRACT FROM AUTHOR]

【Objective】This paper constructed the urban land use efficiency index system.【Methods】The present situation of urban land use efficiency in Hebei province from 2008 to 2017 was analyzed by means of CCR model,hyperefficient DEA model and Malmquist index.【Results】The average land use efficiency of cities in Hebei province byDEA model was 0.961 and 0.913 from 2008 to 2017, respectively.In terms of the time dimension under the hyperefficient DEA model,the average annual land use efficiency in Hebei province from 2008 to 2017 was the lowest in 2010 and the highest in 2017.In the spatial dimension,the average land utilization rate of cities in Hebei province from 2007 to 2018 was 0.905-1.391,the highest in Tangshan,and the lowest in Baoding.Using the Malmquist total factor change index,the average land use efficiency in Hebei province from 2008 to 2017 was 1.011,with the average annual increase of 1.1 %.【Conclusion】The use of advanced science and technology and information management tools could strengthen the control of urban land area,revitalize stocks and increase government supervision,thereby further improving urban land use efficiency and making urban land use develop in a direction of smart growth. [ABSTRACT FROM AUTHOR]

As the chemical fertilizer and pesticide are the main agricultural inputs,they have remarkable roles in sugarcane production. However,the rising of production costs and problems of environmental pollution become more and more serious because of excessive application. Therefore,chemical fertilizer and pesticide application reduction and efficiency enhancement technologies of sugarcane production are important safeguards to promote transformation and upgrading of sugarcane industry and achieve sugarcane green and efficient production. In the present paper,the current situation of the application of chemical fertilizers and pesticides on sugarcane production were analyzed,the technical measures of chemical fertilizer and pesticide application reduction and efficiency enhancement of sugarcane production were systematically combed,and the following constructive methods were proposed:(i)The concept of reducing the use of chemical fertilizer and pesticide should be formed through the guiding role of policies.(ii)To develop new types of products that are conducive to green and efficient production.(iii)To promote application reduction and efficiency enhancement technologies to reduce the use of chemical fertilizer and pesticide and improve quality and ensure the effectiveness. Through the above technologies and methods,it is hoped to achieve the healthy and green development of sugarcane industry. [ABSTRACT FROM AUTHOR]

[Objective] In recent years, the sustainable development of ecological and economic systems has become a key area and a hot issue in geography research. [Method]Based on the theory of energy, this paper constructed an evaluation index system for the sustainable development of regional eco-economic systems, and ArcGis software was used to analyze the sustainable development status and regional differences of Shanxi’s eco-economic system in 2016. [Result] (i) In 2016, the sustainable development level of the eco-economic system in Shanxi province was low overall, the energy value of non-renewable resources occupied a dominant position, and the dependency on traditional resources was excessive; (ii) Due to the regional economic development level and region differences in resource reserves, Shanxi province ecological economic system in the social subsystems, economic subsystems and natural subsystems had significant regional differences in energy index measurement ; (iii) From the comprehensive evaluation of sustainable development, the external economy of Xinzhou city had the greatest contribution, the economic development in Jinzhong city had the most vitality and potential, and Yuncheng city had the best indicators of sustainable development. [Conclusion]There are obvious regional differences in the sustainability of the ecological economic system in Shanxi Province, but the development potential is large. Each region should formulate corresponding policies and measures according to local conditions, and strive to improve the system earning capacity and sustainable development. [ABSTRACT FROM AUTHOR]

【Objective】Rwanda belongs to tropical plateau landscape, with many mountains, known as the ‘country’ of thousands of hills, high population density, farming land less, for a long time unreasonable traditional agricultural practices and deforestation for firewood caused serious soil erosion and restricted the sustainable development of local agriculture. 【Method】The China-Rwanda Agricultural Technology Demonstration Center considered the JUNCAO project as one of the important contents to solve this problem. In this paper, three different models of runoff field experiment were set up, with ‘traditional hillside cropping’ model as the control(CK). 【Result】The water loss rate of ‘contour planting giant grass’ model decreased by 82.39 %, the soil loss rate reduced by 96.26 %; And the water loss rate of ‘ contour planting giant grass & terraces inter-cropping’ model decreased by 74.64 %, soil loss rate reduced by 90.4 %. ‘contour planting giant grass’ model was higher in organic matter C, effective P and K content than traditional cultivation mode, indicating that the cultivation of giant grass had the potential to improve soil fertility. 【Conclusion】 Planting giant grass(JUNCAO) had a better effect on the water and soil conservation, and improving soil fertility and high yield, and by harnessing JUNCAO technology, the mushroom industry and animal husbandry was to open a new way for the sustainable development of local agriculture. [ABSTRACT FROM AUTHOR]