Search scope:
排序： Display mode:
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
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。
The Assessment of the Impacts of Land Use Change on the Ecosystem Carbon Sink
Wu Jianguo,Zhang Xiaoquan,Xu Deying
Strategic Study of CAE 2003, Volume 5, Issue 9, Pages 65-71
Based on the analyzing of the carbon cycle under different ecosystem in Liupan mountain forest zone and the conception of carbon sink and source , the impacts of land use change on the carbon sink of ecosystem were assessed. It is found that the function of ecosystem carbon source or sink under different land uses includes carbon storage, input and output of ecosystem carbon pool, net change of carbon storage and stabilization of soil organic carbon (SOC). The ecosystem carbon storage under natural secondary forest or plantation ecosystem is higher than that under cropland or rangeland ecosystem . The storage of ecosystem carbon, SOC, active SOC pool, slow SOC, protected and unprotected fraction of SOC and labile fraction of SOC under secondary forest or plantation ecosystem are higher than those under cropland and rangeland ecosystem. Natural secondary forest ecosystem is strong carbon sink, while plantation ecosystem is weak carbon sink, and cropland or rangeland ecosystem is source. The measures of increasing ecosystem sink include increasing input of ecosystem carbon pool, decreasing output of ecosystem carbon pool and increasing stabilization of SOC in ecosystem.
Keywords： land use change soil organic carbon carbon cycle ecosystem carbon sink/source
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
Zhenrui Zhang, Xinghui Xia, Zhifeng Yang
Engineering 2023, Volume 28, Issue 9, Pages 11-15 doi: 10.1016/j.eng.2022.04.014
Keywords： China city areas THE AUTHORS.Published behalf Company Engineering Education Press Academy carbon changes decades: Implications
Ziming Han, Haodi Feng, Xiao Luan, Yunpeng Shen, Liren Ren, Liujie Deng, D.G. Joakim Larsson, Michael Gillings, Yu Zhang, Min Yang
Engineering 2022, Volume 15, Issue 8, Pages 78-88 doi: 10.1016/j.eng.2022.05.011
Fermentation-based antibiotic production results in abundant nutrient-rich fermentation residue with high potential for recycling, but the high antibiotic residual concentration restricts its usefulness (e.g., in land application as organic fertilizer). In this study, an industrial-scale hydrothermal facility for the treatment of erythromycin fermentation residue (EFR) was investigated, and the potential risk of the long-term soil application of treated EFR promoting environmental antibiotic resistance development was evaluated. The treatment effectively removed bacteria and their DNA, and an erythromycin removal ratio of up to approximately 98% was achieved. The treated EFR was utilized as organic fertilizer for consecutive field applications from 2018 to 2020, with dosages ranging from 3750 to 15 000 kg∙hm－2, resulting in sub-inhibitory levels of erythromycin (ranging from 0.83–76.00 μg∙kg－1) in soils. Metagenomic shotgun sequencing was then used to characterize the antibiotic resistance genes (ARGs), mobile genetic elements (MGEs), and bacterial community composition of the soils. The soil ARG abundance and diversity did not respond to the treated EFR application in the first year, but gradually changed in the second and third year of application. The highest fold change in relative abundance of macrolide-lincosamidestreptogramin (MLS) and total ARGs were 12.59 and 2.75 times, compared with the control (CK; without application), respectively. The soil MGEs and taxonomic composition showed similar temporal trends to those of the ARGs, and appeared to assist in driving increasing ARG proliferation, as revealed by correlation analysis and structural equation models (SEMs). The relative abundance of particular erm resistance genes (RNA methyltransferase genes) increased significantly in the third year of treated EFR application. The close association of erm with MGEs suggested that horizontal gene transfer played a critical role in the observed erm gene enrichment. Metagenomic binning results demonstrated that the proliferation of mac gene-carrying hosts was responsible for the increased abundance of mac genes (efflux pump genes). This study shows that sub-inhibitory levels of erythromycin in soils had a cumulative effect on soil ARGs over time and emphasizes the importance of long-term monitoring for assessing the risk of soil amendment with treated industrial waste.
Keywords： Pharmaceutical manufacturing Resistome Antibiotic Risk assessment Remediation Land application
Strategic Management of Large Projects
Wang Yingluo,Liu Yi,Li Yuan
Strategic Study of CAE 2004, Volume 6, Issue 2, Pages 28-32
The strategic management of large projects is both theoretically and practically important. Some scholars have advanced flexible strategy theory in China. Strategic flexibility and flexible strategy, and the basic system and characteristics of flexible strategy coupled with the changes of flexible strategy and integration of strategic management are discussed in this paper.
Keywords： flexible strategy strategic management large projects
Achieve the Great Leap from a Large Manufacturing Country to a World Manufacturing Power
The Research Group for the Manufacturing Power Strategy
Strategic Study of CAE 2015, Volume 17, Issue 7, Pages 1-6
The joint major consulting project “Manufacturing power strategy research” by the Chinese Academy of Engineering (CAE) and the Ministry of Industry and Information Technology began in 2013. The manufacturing development problems of machinery, aerospace, aviation, railway traffic, ship, automobile, power equipment, information electronics, metallurgy, chemical, textile, home appliance, instrument, and so on a total of 13 areas were researched. The present status, opportunities and challenges on manufacturing industry in China were analyzed. The reason why manufacturing industry in China is huge but not strong was summarized. Meanwhile, the ideas and targets of manufacturing power engineering science and technology strategy were put forward. The study built up an index system for manufacturing nations and forecasted the development trend of the manufacturing industry in China. Finally, the project proposed for guiding principles and strategic countermeasures transform manufacturing. According to the research team, China should become a manufacturing power by 2025, reach a medium level among the world’s best manufacturers by 2035, and rank near the top of the league table by 2045. The project provided scientific decision-making support for “Made in China 2025”.
Keywords： manufacturing power strategy engineering science and technology index system guiding principles strategic countermeasures “Made in China 2025”
Rui Li, Beidou Xi, Yu Jiang, Zheng Xu, Mingxiao Li, Yan Hao, Fanhua Meng, Shaobo Gao, Lei Chen, Lixu Zhu
Strategic Study of CAE 2018, Volume 20, Issue 5, Pages 45-51 doi: 10.15302/J-SSCAE-2018.05.007
As the two largest “granaries” in China, the Northeast and Huang-Huai-Hai Plains are the main agricultural producing areas in North China, and the soil environmental risk management and control of these areas are vital to the national food security supply lifeline. This study analyzed the soil heavy metal pollution risks of main agricultural producing areas in North China by the potential ecological risk index method. The high-risk areas of Cd pollution are mainly distributed in Shenyang City in the east of Liaohe Plain, Jinzhou City and Huludao City in the south of Liaohe Plain, Shuangyashan in the Sanjiang Plain, Tianjin City in the Haihe Plain, and Xinxiang City in the southwest of the yellow river flood plain; Hg pollution high-risk areas are mainly distributed in Beijing and Tianjin of the Haihe Plain, and around the Shenyang City of the Liaohe Plain. The chemical industry, followed by the livestock and poultry industry, as well as the metal smelting and processing industry, is the major potential source of heavy metal pollution of soil in the Northeast and Huang-Huai-Hai Plains. This study proposed the “one area, one policy” pollution prevention strategy and key environmental protection projects from the aspects of environment monitoring and warning of agricultural products producing areas, clean production of industrial and mining enterprises, and comprehensive treatment of livestock and poultry pollution, which is based on local conditions and classification guidance. This study can provide important references for the strategic planning of sustainable development of the ecological environment of major agricultural producing areas in North China.
Keywords： 的污染防治战略及重点环保工程。本研究对我国北方主要农产品产地生态环境可持续发展战略规划具有重要参考意义。 污染高风险区域主要集中分布于辽河平原东部的沈阳市、南部的锦州市与葫芦岛市，三江平原双鸭山市，海河平原天津市，以及黄泛平原西南部的新乡市；Hg 污染高风险区域主要分布于海河平原北京市、天津市，辽河平原沈阳市周边化工行业是导致东北及黄淮海平原农产品产地土壤重金属污染的最主要潜在污染源，其次为畜禽养殖业、金属冶炼加工业。本研究从农产品产地环境监测预警、工矿企业清洁生产、畜禽养殖污染综合治理等方面，以因地制宜、分类指导为原则，提出了 ，是北方主要农产品产地，其土壤环境风险管控关系着全国粮食安全供给命脉。本研究通过潜在生态指数法分析了北方主要农产品产地土壤重金属污染风险，研究结果表明，Cd 污染高风险区域主要集中分布于辽河平原东部的沈阳市、南部的锦州市与葫芦岛市，三江平原双鸭山市，海河平原天津市，以及黄泛平原西南部的新乡市
Zoning of Agricultural Resource and Environment in China
Erqi Xu
Strategic Study of CAE 2018, Volume 20, Issue 5, Pages 57-62 doi: 10.15302/J-SSCAE-2018.05.009
Problems in China’s agricultural resources and environment have become increasingly prominent, with distinct resource and environment constraints for regional agricultures. Based on regional differentiation in agricultural resource and environment characteristics, this paper divided the country into 10 first-level zones and 57 second-level zones at the county scale. The first-level zones were divided according to regional differentiation in climate and geotectonic. And the second-level zones differentiate in water resources, land resources, and environmental conditions. It analyzed the agricultural production conditions, types of resources and their different combinations, environmental production conditions, and existing problems in these zones. This study proposed the strategies of “optimizing the spatial layout of eastern, central, and western regions” and “improving Northeast China, regulating North China, and recovering South China”. Twenty-seven second-level zones, undertaking the supply of major agricultural products in China, were identified and labeled as “major agricultural developing regions in China”. The development direction and construction measures of the major agricultural developing regions in China were suggested to maintain and improve the health and sustainability of China’s agricultural production system.
Keywords： 一级区依据气候条件和大地构造的地域分异，二级区根据水资源、土地资源和环境条件问题差异。分析了全国各分区农业生产条件、资源类型及其组合的特点、环境生产条件和存在问题，提出 中国农业资源环境问题日益突出，区域农业资源限制因素和环境制约问题各不相同。依据农业资源环境地域分异，以县域为制图单元，本文将全国划分为10 提高东北，整治华北，恢复南方 战略，并划分了27 个承担主要农产品供给保障功能的 ，指明其建设方向措施，以维护和改善我国农业生产系统的健康和可持续性
Study on the trinity strategy of coal chemical industry park
Wang Yingluo
Strategic Study of CAE 2008, Volume 10, Issue 12, Pages 39-44
The National Eleventh Five-Year Plan for National Economic and Social Development of China clearly points out that China will vigorously develop coal chemical industry, promote in-depth processing and utilization of coal, develop circular economy, conserve resource, promote clean production and reduce the impact of development on environment and ecology. This paper firstly discussed the trinity strategy of "Coal mining – Coal chemical industry – Coal chemical industry equipment manufacturing" , then discussed the strategic meaning, feasibility and economic benefit of the trinity strategy,finally proposed a kind of circular economy development mode of coal chemical industry park, including the implementation steps of trinity strategy, the operation and management mode of implementing circular economic industry park.
Keywords： coal mining coal chemical industry equipment manufacturing
Quasi-period Changes of the Operational Parameters for Hot Oil Pipelines
Cui Hui
Strategic Study of CAE 2006, Volume 8, Issue 1, Pages 51-53
Subjected to the annual changes of the air temperature, the quasi-period rules of the operational parameters of the buried hot oil pipelines and the surrounding soil temperature are theoretically presented in this paper. On the basis of large numbers of actual operational data, the rationality of the rules is further validated. In addition, the delay of the operational parameters must be considered in the studies of the saving energy, optimizing operation and economically pigging for hot oil pipelines.
Keywords： hot oil pipeline air temperature soil environment quasi-period
Li Wenhua1,Cheng Shengkui,Mei Xurong,Liu Moucheng and Hong Chuanchun
Strategic Study of CAE 2016, Volume 18, Issue 1, Pages 56-64 doi: 10.15302/J-SSCAE-2016.01.008
Food security is based on the agricultural resources and environment. At present, China's agricultural resources and environment have been faced with three problems. First, due to the shrinking of sown areas and the quality reduction and spatial pattern changes of cultivated land, China's cultivated land resource cannot provide sustainable support for its food production. Second, the contradiction between "the increasing grain demand and the decreasing water resource" has become obvious and the "north-to-south grain transfer" has been increasingly difficult. Third, the agricultural eco-environment has deteriorated and the service function of the agricultural ecosystem cannot be brought into full play. To solve these problems, we should implement the efficient modern ecological agriculture strategy, rebalancing strategy in the grain production area and the trade substitution strategy. Based on these strategies, relevant policy suggestions are also put forward.
Keywords： cultivated land resource water resource agricultural resource and eco-environment ecosystem services eco-compensation
The Chemicals Input Status and Transformation Path of the Planting Industry in China
Yi Xiaoyan,Yuan Meng and Yin Changbin
Strategic Study of CAE 2017, Volume 19, Issue 4, Pages 124-129 doi: 10.15302/J-SSCAE-2017.04.020
This paper examines the total inputs and regional characteristics of chemical input in China since the 1990s, analyzes existing problems of chemical input, and puts forward a general transformation idea, transformation path, and security system for chemicals. Certain phenomena that result in obvious problems for this industry include the excessive use and a low utilization rate of chemicals, regional imbalances in chemicals input, imbalanced crops, and irrational crop structure within the planting industry. In addition, input methods need improvement. It is essential to transform the production mode by optimizing regional layouts, reforming planting systems, developing new chemicals, and adopting precision agricultural technologies. It is also necessary to strengthen support for and promote the green and sustainable development of farming based on scientific and technological innovation, integrated demonstrations, subsidy systems, standard specifications, and industry/university/research institute collaborations.
Keywords： planting industry chemical input transformation path chemical fertilizers and pesticides security system
Title Author Date Type Operation
Strategies for Soil Fertility Improvement of Arable Land in China
Yingjie Hu, Xiangbin Kong, Yuzhen Zhang
Journal Article
The Impact of Cropland Spatial Pattern Change on Grain Production in China
Li Yuanyuan, Tan Minghong, Zhang Hongqi
Journal Article
The Assessment of the Impacts of Land Use Change on the Ecosystem Carbon Sink
Wu Jianguo,Zhang Xiaoquan,Xu Deying
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
Soil Organic Carbon Changes in City Areas of China Over the Past Three Decades: Implications for Achieving Carbon Neutrality
Zhenrui Zhang, Xinghui Xia, Zhifeng Yang
Journal Article
Francis Zvomuya: Restoring Degraded Soil Fertility and Improving Crop Productivity: Canadian Experience and Practices (2019.8.22）
23 Apr 2021
Conference Videos
Three-Year Consecutive Field Application of Erythromycin Fermentation Residue Following Hydrothermal Treatment: Cumulative Effect on Soil Antibiotic Resistance Genes
Ziming Han, Haodi Feng, Xiao Luan, Yunpeng Shen, Liren Ren, Liujie Deng, D.G. Joakim Larsson, Michael Gillings, Yu Zhang, Min Yang
Journal Article
Achieve the Great Leap from a Large Manufacturing Country to a World Manufacturing Power
The Research Group for the Manufacturing Power Strategy
Journal Article
Soil Pollution Risk Assessment and Comprehensive Prevention Strategy for Major Agricultural Producing Areas in North China
Rui Li, Beidou Xi, Yu Jiang, Zheng Xu, Mingxiao Li, Yan Hao, Fanhua Meng, Shaobo Gao, Lei Chen, Lixu Zhu
Journal Article
Study on Strategies for the Sustainable Development of China’s Agricultural Resources and Environment
Li Wenhua1,Cheng Shengkui,Mei Xurong,Liu Moucheng and Hong Chuanchun
Journal Article
京公网安备 11010502051620号
