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The Impact of Cropland Spatial Pattern Change on Grain Production in China
Li Yuanyuan, Tan Minghong, Zhang Hongqi
Strategic Study of CAE 2018, Volume 20, Issue 5, Pages 90-95 doi: 10.15302/J-SSCAE-2018.05.014
Cropland is the basis of grain production. In recent decades, the spatial pattern of cropland in China has changed significantly, which has caused some impact on grain production. Based on land cover data of 1990, 2000, and 2010, this study explored changes in the spatial pattern of cropland, and constructed a database with a spatial resolution of 1 km based on county-level agricultural statistics and soil organic matter data, which is the representative of crop productivity. The results show that: during the period from 1990 to 2010, drastic reclamation happened in Northeast and Northwest China while the cropland acreage decreased in Huang-Huai-Hai Plain; the main source of new cropland during the study period was grassland (46.9%), and the lost cropland was mainly converted to forest land (36.6%) in the first ten years and then to construction land (53.0%) in the following ten years; the changes in the spatial pattern of cropland have caused a decrease of 2.0% in the average crop productivity, and during this period, the construction land mostly occupied high-quality cropland, while the newly reclaimed cropland had lower crop productivity.
Keywords： 耕地是粮食生产的基础，近几十年来中国耕地空间格局变化显著，对粮食生产造成一定影响。本研究以1990 年土地覆被数据为基础，探究耕地空间格局变化，并基于县级农业统计数据和土壤有机质数据得到空间分辨率为1 ，在此期间建设用地多占用优质耕地，而新开垦的耕地粮食生产力普遍较低。
Strategies for Soil Fertility Improvement of Arable Land in China
Yingjie Hu, Xiangbin Kong, Yuzhen Zhang
Strategic Study of CAE 2018, Volume 20, Issue 5, Pages 84-89 doi: 10.15302/J-SSCAE-2018.05.013
This paper systematically reviews the trends of soil fertility of arable land in China and puts forwards that the soil fertility improvement of arable land in China should realize the strategic change from single application of chemical fertilizer to the combined application of organic and inorganic fertilizers, combine cultivation with preservation to maintain soil fertility, and implement spatial differentiation control. Moreover, this paper summarizes the ways to improve the soil fertility of arable land in China, including increasing the application of organic fertilizer, promoting straw returning to the field, resuming and promoting green manure cultivation, improving the farming conditions, and optimizing the layout of agroforestry networks. At last, this paper proposes policy suggestions of implementing high-standard farmland construction projects, soil improvement and restoration projects, grass-crop rotation projects, straw returning projects, and livestock and poultry manure application projects.
Keywords： 保持土壤肥力，应实行空间差异化管控的战略思路，总结出增施有机肥、推广秸秆还田、恢复推广绿肥种植以及提升农田耕作条件和优化农田林网布局等耕地土壤肥力提升实现途径，提出了国家继续实施高标准农田建设工程、土壤改良修复工程 本文系统梳理了中国耕地土壤肥力变化态势，提出我国耕地土壤肥力提升应实现从单一施用化肥向有机无机肥相结合的战略转变，应
Study on the Spatial Patterns of the Qinba Mountain Area Based on High-Speed Transportation Networks
Wu Tinghai and Zhang Neng
Strategic Study of CAE 2016, Volume 18, Issue 5, Pages 52-59 doi: 10.15302/J-SSCAE-2016.05.008
Improving regional accessibility is an important mean to carry out poverty alleviation and realize sustainable development in the Qinba Mountain Area of China. This paper studies the accessibility of central cities in the Qinba Mountain Area to surrounding urban agglomerations, and determines the spatial patterns of the region by using the high-speed transportation network identified in National Highway Network Planning (2013—2030) and China's Medium and Long Term Railway Network Planning. The study finds that with the development and construction of the rapid transit network planned by our country, three main radial urban corridors from Xi'an to Wanzhou, Xiangyang, and Luoyang, separately and three secondary urban corridors, namely, the Xi’an—Tianshui, Xi'an—Guangyuan, and Dazhou—Xiangyang—Nanyang—Luoyang corridors will be formed, in Qinba Mountain Area. These urban corridors will lead to the emergence of four vast green fields which are taking Longnan, Bazhong, Shiyan, and Luanchuan as the core. This paper suggests that the future spatial planning should establish the spatial order in the Qinba Mountain Area and arrange the urban corridors and the vast green fields properly to achieve a balance between protection and development.
Keywords： the Qinba Mountain Area spatial patterns high-speed transportation network spatial planning urban corridor vast green fields
Research on the Strategy for Improving Cultivated Land Quality in China
Hongqi Zhang, Minghong Tan, Xiangbin Kong, Yongmei Xu, Erqi Xu, Erping Shang
Strategic Study of CAE 2018, Volume 20, Issue 5, Pages 16-22 doi: 10.15302/J-SSCAE-2018.05.003
Based on a systematic analysis of changes in quantity and quality of cultivated land in China, this paper put forward an overall strategic thinking of realizing three strategic transformations in the cultivated land management from the aspects of quantity, quality, and ecology of the cultivated land. Five important measures, including enhancing the cultivated land quantity in China, curbing undisciplined growth of construction land, improving the fertility of cultivated soil, preventing and controlling heavy metal pollution of soil, and preventing and controlling agricultural film pollution, were proposed. It was also recommended that four major projects, namely middle- and low-yield farmland reforms, comprehensive improvement of rural land, comprehensive reparation of heavy metal pollution of soil, and soil and water conservation, sand prevention, and saline soil improvement, should be implemented as soon as possible.
Keywords： cultivated land quality temporal and spatial change strategy major projects
The new space of Shanghai City development and the new evolution stage of the Yangtze estuary
Chen Jiyu,Jiang Xuezhong,He Qing
Strategic Study of CAE 2013, Volume 15, Issue 6, Pages 20-24
The natural evolution pattern of the Yangtze estuary was changed by human activities. The estuary is not controlled by the sides' cape as it did in the past. In the middle of the estuary, a beaded island chain was formed by the Changxing Island, the Jiuduansha mudflat, the Hengsha Island and the Hengsha east shoal, and a new sub estuarine delta is coming into being. This sub delta keeps expanding outward relying on the engineering constructions. The Hengsha east shoal will become land due to mudflat enclosure and siltation with waterway dredging soil. The new reclaimed land area could reach 400 km2 and more than 18 km deep-water shoreline exists along the north coast of the mudflat edge. The plenty resources of the new sub estuarine delta and an artificial island outside the estuary could become a new space for Shanghai City development and a suitable location of deep-water harbor site.
Keywords： Yangtze estuary estuary pattern sub delta
Bian Yousheng,Cai Bofeng,Zhao Nan
Strategic Study of CAE 2005, Volume 7, Issue 12, Pages 54-60
The ecological function division is the premise of reconciliation of economy, society and environment 3S technologies are the important guarantee of the accuracy and feasibility for the ecological function division. Taking the city of Puyang in Henan Province as an example, the characteristics and advantages of using 3S technologies for ecological function region division are demonstrated. The 3S technologies can make the data much more accurate, more close to the status quo and more scientific. The spatial analysis function can fulfill the overlay analysis of differently weighed factors. The ecological pattern which deeply influences the ecological function are sufficiently considered in the division process thanks to 3S technologies. All mentioned above greatly improve the reasonability and practical significance of the ecological function division.
Keywords： ecological function division 3S spatial analysis ecological pattern
Exploration and research of space physics and space weather
Wang Chi
Strategic Study of CAE 2008, Volume 10, Issue 6, Pages 41-45
Space physics is a fast-growing cross-discipline science with the advance of satellite technology since 1957. Space environment is becoming more and more important as the fourth living environment for human being. Starting from the early 1990s, space weather is born by applying the fundamentals of space physics to applications. The space weather study is aimed to investigate and alleviate the disaster effects of solar activity on our high-tech systems on the earth and in space. This report gives a brief summary of the history, current status and future direction of the international space physics and space weather exploration and study, and introduces the suggested space physics and space weather mid-long term development strategic plan and exploration roadmap.
Keywords： space physics space weather space physics exploration strategic plan
Coordinated Development of Space Science, Space Technology, and Space Application in China
Zhou Jianping, Wu Ji
Strategic Study of CAE 2023, Volume 25, Issue 2, Pages 59-66 doi: 10.15302/J-SSCAE-2023.02.007
Owing to historical reasons and investment restrictions, China’s aerospace industry initially focused on space technology and application, with insufficient emphasis on space science; therefore, space science, technology, and application developed independently. The development of space technology should be deeply integrated into space science and application, thus to strengthen China’s aerospace industry and create new opportunities and achievements. This study explores the implications of space science, space technology, and space application and clarifies their interrelationships. Moreover, it systematically analyzes the development trend in space science, technology, and application worldwide and reviews the development situation of space-related fields in China. Based on this, it examines the necessity for coordinating the development of space science, technology, and application in China and summarizes the major challenges. Considering their overlapping needs and mutual promotion, space science, technology, and application should be coordinated throughout the process of planning, deployment, and implementation. First, the advantages of the new national system should be exploited to conduct top-level planning under unified management. Second, the innovation-driven development strategy should be insisted to promote the international competitiveness of China’s aerospace industry through technological progress. Third, basic research in the space field should be strengthened and high-level scientists and engineers should be cultivated. Lastly, resource planning and coordination should be strengthened to promote the rational opening and full utilization of space application data.
Keywords： aerospace industry space science space technology space application coordinated development sharing of space data
The Role of Hydropower in Climate Change Mitigation and Adaptation: A Review
Luis Berga
Engineering 2016, Volume 2, Issue 3, Pages 313-318 doi: 10.1016/J.ENG.2016.03.004
Hydropower is a clean, renewable, and environmentally friendly source of energy. It produces 3930?(TW•h)•a–1, and yields 16% of the world’s generated electricity and about 78% of renewable electricity generation (in 2015). Hydropower and climate change show a double relationship. On the one hand, as an important renewable energy resource, hydropower contributes significantly to the avoidance of greenhouse gas (GHG) emissions and to the mitigation of global warming. On the other hand, climate change is likely to alter river discharge, impacting water availability and hydropower generation. Hydropower contributes significantly to the reduction of GHG emissions and to energy supply security. Compared with conventional coal power plants, hydropower prevents the emission of about 3?GT CO2 per year, which represents about 9% of global annual CO2 emissions. Hydropower projects may also have an enabling role beyond the electricity sector, as a financing instrument for multipurpose reservoirs and as an adaptive measure regarding the impacts of climate change on water resources, because regulated basins with large reservoir capacities are more resilient to water resource changes, less vulnerable to climate change, and act as a storage buffer against climate change. At the global level, the overall impact of climate change on existing hydropower generation may be expected to be small, or even slightly positive. However, there is the possibility of substantial variations across regions and even within countries. In conclusion, the general verdict on hydropower is that it is a cheap and mature technology that contributes significantly to climate change mitigation, and could play an important role in the climate change adaptation of water resource availability. However, careful attention is necessary to mitigate the substantial environmental and social costs. Roughly more than a terawatt of capacity could be added in upcoming decades.
Keywords： Renewable energy Hydropower Climate change mitigation Impacts of climate change
Microseismic monitoring technology
Tang Chunhua,Gu Guangqing
Strategic Study of CAE 2012, Volume 14, Issue 4, Pages 95-99
Microseismic (MS) monitoring is a hot topic in the applied geophysics recently. The MS mechanism and histories are introduced firstly in this article, and then the instruction of the MS equipment such as acquisition strategies, optimal sensors, array design, digital-signal processing, event location, velocity calibration, and monitoring deployment, is discussed. MS is a great technology with a long future, and we need to foster the understanding and acceptance of this technology.
Keywords： microseismic monitoring hydraulic fracturing oil and natural gas SNR (signal to noise ratio) event location
The Realistic Pattern and Path Choice of the Development of Agricultural Software Industry
Ma Chen, Li Jin, Zhang Qian, Feng Xian, Jie Xiaojing
Strategic Study of CAE 2021, Volume 23, Issue 4, Pages 19-29 doi: 10.15302/J-SSCAE-2021.04.003
As the integration of information technology and agricultural development accelerates, the agricultural software industry has emerged to support the development of smart agriculture. In this article, we first analyze the development status of and challenges faced by China’s agricultural software industry by analyzing the development strategies of the industry in China and abroad and using literature review and survey data. Subsequently, we propose the strategic goals, major engineering projects, and policy measures for the development of China’s agricultural software industry. China’s agricultural software industry has a large gap with other countries in terms of technology development and promotion, enterprise operation, and user accumulation. The major challenges include difficulty in development, weak innovation capabilities, low return on investment, and insufficient protection of intellectual property rights, restricting the growth of China’s agricultural software industry. China should regard the software development of agricultural technologies as the main line and focus on strengthening the innovative capabilities of its agricultural software industry by 2035. The major engineering projects we proposed involve agricultural enabling software and platform development, precision agriculture management software application promotion, agricultural software industry cluster establishment, and agricultural software enterprise cultivation. Furthermore, China should improve its policy support system, strengthen the overall coordination mechanism, optimize the discipline system, and strengthen talent training for the agricultural software industry.
Keywords： agricultural software industry feature classification current pattern path choice suggestions for major projects
Disastrous weather trend under global climate change and its influence on offshore wind power
Ge Shanshan,Zhang Ren
Strategic Study of CAE 2010, Volume 12, Issue 11, Pages 71-77
The state of disastrous weather in China is studied comprehensively, and the characteristics of global climate change, driving factors and trend are analyzed based on the research achievement. Furthermore, the response on extreme weather of China is explored under global climate change. Thus, metrological and hydrological factors that affect offshore wind power are proposed and analyzed, and the issue against the typhoon of offshore wind power station was especially emphasized.
Keywords： global climate change disastrous weather offshore wind power
Research on Cyberspace Sovereignty
Fang Binxing,Zou Peng and Zhu Shibing
Strategic Study of CAE 2016, Volume 18, Issue 6, Pages 1-7 doi: 10.15302/J-SSCAE-2016.06.001
Cyberspace sovereignty (referred to here by its short form, cyber sovereignty) is the extension of national sovereignty to the platform of information and communication technology systems. This article defines cyberspace and cyber sovereignty, discusses the existence of cyber sovereignty, and judges several erroneous points of view that deny cyber sovereignty.
Keywords： cyberspace cyberspace sovereignty stakeholder
Li Boheng
Strategic Study of CAE 2004, Volume 6, Issue 3, Pages 1-5
There is limited agricultural land but large population in China. Along with the rapid economic development, large area of agricultural land is converted to be nonagricultural use by numerous projects every year. There is obvious conflict between population growth and agricultural land reduction. In order to support sustainable economic development, the Chinese Government has decided to implement the protection system of primary agricultural land. Class 1 and Class 2 of high quality agricultural land is defined based on the detailed rural land survey. These higher quality agricultural lands are listed as primary agricultural land and protected with strict regulations. The primary agricultural land protection system is one of the basic conditions to support sustainable development and prosperity of China.
Keywords： enhance agricultural land protection
Yun Gao,Xiang Gao,Xiaohua Zhang
Engineering 2017, Volume 3, Issue 2, Pages 272-278 doi: 10.1016/J.ENG.2017.01.022
The Paris Agreement proposed to keep the increase in global average temperature to well below 2 °C above pre-industrial levels and to pursue efforts to limit the temperature increase to 1.5 °C above pre-industrial levels. It was thus the first international treaty to endow the 2 °C global temperature target with legal effect. The qualitative expression of the ultimate objective in Article 2 of the United Nations Framework Convention on Climate Change (UNFCCC) has now evolved into the numerical temperature rise target in Article 2 of the Paris Agreement. Starting with the Second Assessment Report (SAR) of the Intergovernmental Panel on Climate Change (IPCC), an important task for subsequent assessments has been to provide scientific information to help determine the quantified long-term goal for UNFCCC negotiation. However, due to involvement in the value judgment within the scope of non-scientific assessment, the IPCC has never scientifically affirmed the unacceptable extent of global temperature rise. The setting of the long-term goal for addressing climate change has been a long process, and the 2 °C global temperature target is the political consensus on the basis of scientific assessment. This article analyzes the evolution of the long-term global goal for addressing climate change and its impact on scientific assessment, negotiation processes, and global low-carbon development, from aspects of the origin of the target, the series of assessments carried out by the IPCC focusing on Article 2 of the UNFCCC, and the promotion of the global temperature goal at the political level.
Keywords： Climate change International negotiation Intergovernmental Panel on Climate Change United Nations Framework Convention on Climate Change Long-term goal Critical vulnerability Intuitive building
Title Author Date Type Operation
The Impact of Cropland Spatial Pattern Change on Grain Production in China
Li Yuanyuan, Tan Minghong, Zhang Hongqi
Journal Article
Strategies for Soil Fertility Improvement of Arable Land in China
Yingjie Hu, Xiangbin Kong, Yuzhen Zhang
Journal Article
Study on the Spatial Patterns of the Qinba Mountain Area Based on High-Speed Transportation Networks
Wu Tinghai and Zhang Neng
Journal Article
Research on the Strategy for Improving Cultivated Land Quality in China
Hongqi Zhang, Minghong Tan, Xiangbin Kong, Yongmei Xu, Erqi Xu, Erping Shang
Journal Article
The new space of Shanghai City development and the new evolution stage of the Yangtze estuary
Chen Jiyu,Jiang Xuezhong,He Qing
Journal Article
Application of 3S Technologies to Regional Ecological Function Division —A Case of City of Puyang in Henan Province
Bian Yousheng,Cai Bofeng,Zhao Nan
Journal Article
Coordinated Development of Space Science, Space Technology, and Space Application in China
Zhou Jianping, Wu Ji
Journal Article
The Role of Hydropower in Climate Change Mitigation and Adaptation: A Review
Luis Berga
Journal Article
The Realistic Pattern and Path Choice of the Development of Agricultural Software Industry
Ma Chen, Li Jin, Zhang Qian, Feng Xian, Jie Xiaojing
Journal Article
Disastrous weather trend under global climate change and its influence on offshore wind power
Ge Shanshan,Zhang Ren
Journal Article
Enhance the Protection System of Primary Cultivated Land to Promote Sustainable Prosperity of the Chinese Nation
Li Boheng
Journal Article
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