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Environmental risks for application of magnesium slag to soils in China

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Journal of Integrative Agriculture 2020年第7期19卷 1671-1679页

作者： wang xiao-bin YAN Xiang LI Xiu-ying Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural SciencesBeijing 100081P.R.China

Magnesium slag(MS)is one of the main industrial solid wastes produced by the magnesium *** the problem of its disposal has attracted much attention with increasing amounts of solid wastes generated in the production of metallic *** MS contains calcium(Ca),magnesium(Mg),and silicon(Si),some have tried to use MS as Si-Ca-Mg fertilizer or for soil amendment in ***,in the magnesium metallurgical process,some pollutant elements are introduced into MS,resulting in the enrichment of these pollutants in MS,such as arsenic(As),chromium(Cr),cadmium(Cd),mercury(Hg),copper(Cu),nickel(Ni),fluorine(F)and chlorine(CI).Research indicates that the enrichment of these pollutants can result in high levels,especially for Cd,Hg,Cu,Ni,F and CI(0-4,0-0.74,20-127,100-170,2277-14800 and 133-1000 mg kg1,respectively)in some MS in *** levels are often far beyond the limits(S0.3,s0.5,≤50 and≤60 mg·kg-1 for Cd,Hg,Cu and Ni,respectively)of the Chinese Risk Screening Values for Soil Contamination of Agricultural Land based on the Soil Environmental Quality Risk Control Standard for Soil Contamination of Agricultural Land(GB 15618-2018)or the critical reference values(<800 and≤200 for F and CI,respectively).The elements Hg,Cu,Cr and F(detected in MS leachate at 0.00023--0.0052,0.043--3.89,0.026-0.171,and 1.43-8.52 mg·L-1,respectively)also exceed the limits(Class IV-V)of the Chinese Standard for Groundwater Quality(GB/T 14848-2017).Based on the above results,it is suggested that without any pretreatment for reducing harmful pollutants MS should not be allowed to be applied for soil remediation or conditioning directly into farmlands in order to ensure soil health,food safety and environmental quality.

关键词： environmental safety risk heavy metals industrial solid wastes magnesium slag

Pharmaceutical innovation and advancement of Clinical therapy and public health:enlightenment from artemisinin development

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Chinese Journal of Natural Medicines 2016年第1期14卷 3-4页

作者： wang xiao-bin Department of Population Family and Reproductive HealthJohns Hopkins University Bloomberg School of Public Health

The discovery of artemisinin is significant because not only it is an innovative new drug,but also its treatment of malaria has saved millions of lives worldwide,especially in(tropical)developing *** 2015 Nobel Prize in Physiology or Medicine was awarded to Professor Tu You-You,a scientist from China,who made this seminal *** is one of the most prevalent

关键词：临床治疗药物创新青蒿素公共卫生诺贝尔生理学或医学奖世界卫生组织亚热带地区发展中国家

Potential Effect of Conservation Tillage on Sustainable Land Use: A Review of Global Long-Term Studies

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Pedosphere 2006年第5期16卷 587-595页

作者： wang xiao-bin CAI Dian-Xiong W.B.HOOGMOED O.OENEMA U.D.PERDOK State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 （China） Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing 100081 （China） Farm Technology Group Wageningen University P. O. Box 17 6700 AA Wageningen （The Netherlands） Soil Quality Group Wageningen University P.O.Box 8005 6700 EC Wageningen （The Netherlands）

Although understood differently in different parts of the world, conservation tillage usually includes leaving crop residues on the soil surface to reduce tillage. Through a global review of long-term conservation tillage research, this paper discusses the long-term effect of conservation tillage on sustainable land use, nutrient availability and crop yield response. Research has shown several potential benefits associated with conservation tillage, such as potential carbon sequestration, nutrient availability, and yield response. This research would provide a better perspective of the role of soil conservation tillage and hold promise in promoting application of practical technologies for dryland farming systems in China.

关键词： conservation tillage no-till reduced tillage residue management

Effects of Soil Water Content on Cotton Root Growth and Distribution Under Mulched Drip Irrigation

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Agricultural Sciences in China 2009年第6期8卷 709-716页

作者： HU xiao-tang, CHEN Hu, wang Jing, MENG xiao-bin and CHEN Fu-hong Agricultural College, Shihezi University, Shihezi 832003, P.R.China [a]Agricultural College Shihezi University Shihezi 832003 P.R. China

The relation between soil water content and the growth of cotton root was studied for the scheme of field water and cotton yield under mulched drip irrigation. Based on the field experiments, three treatments of soil water content were conducted with 90%, 75%θf, and 60%θf （θfis field water capacity）. Cotton roots and root-shoot ratio were studied with digging method, and the soil moisture was observed with TDR （time domain reflector）, and cotton yield was measured. The results indicated that the growth of cotton root accorded with Logistic growth curve in the three treatments, the cotton root grew quickly and its weight was very high under 75%θf because of the suitable soil water condition, while grew slowly and its weight was lower under 90%θf due to water moisture beyond the suitable condition, and the root weight was in between under 60%θf For the three water treatments, the cotton root weight decreased with soil depth, and decreased more significantly in deeper soil layer with the soil moisture increasing. And the ratio of cotton root weight in 0-30 cm soil layer to the total root weight was the highest under 75%θf. The cotton root system was distributed mainly in the soil of narrow row and wide row mulched with plastic film, and little in the soil outside plastic film. The weight of cotton root was the highest in the soil of narrow row or wide row mulched with plastic film under 75%θf. Root-shoot ratio decreased with the soil moisture increasing. The soil water content affected cotton yields, and cotton yield was the highest under 75%θf. The higher soil moisture level is unfavorable to the growth of cotton root system and yield of cotton under mulched drip irrigation.

关键词： mulched drip irrigation cotton (Gossypium hirsutum L.) soil water content root

Scenario Analysis of Tillage, Residue and Fertilization Management Effects on Soil Organic Carbon Dynamics

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Pedosphere 2005年第4期15卷 473-483页

作者： wang xiao-bin CAI Dian-Xiong W. B. HOOGMOED O. OENEMA U. D. PERDOK Soil and Fertilizer Institute Chinese Academy of Agricultural Sciences Beijing 100081 （China） Soil Technology Group Wageningen University P. O. Box 17 6700 AA Wageningen （The Netherlands） Soil Quality Group Wageningen University P. O. Box 8005 6700 EC Wageningen （The Netherlands）

Based on data from 10-year field experiments on residue/fertilizer management in the dryland farming region of northern China, Century model was used to simulate the site-specific ecosystem dynamics through adjustment of the model＇s parameters, and the applicability of the model to propose soil organic carbon （SOC） management temporally and spatially, in cases such as of tillage/residue/fertilization management options, was identified v/a scenario *** between simulations and actual measurements were in close agreement when appropriate applications of stover,manure and inorganic fertilizer were combined. Simulations of extreme C/N ratios with added organic materials tended to underestimate the measured effects. Scenarios of changed tillage methods, residue practices and fertilization options showed potential to maintain and enhance SOC in the long run, while increasing inorganic N slowed down the SOC turnover rate but did not create a net C sink without any organic C input. The Century model simulation showed a good relationship between annual C inputs to the soil and the rate of C sequestration in the top 20 cm layer and provided quantitative estimations of changes in parameters crucial for sustainable land use and management. Conservation tillage practices for sustainable land use should be integrated with residue management and appreciable organic and inorganic fertilizer application, adapted according to the local residue resource, soil fertility and production conditions. At least 50% residue return into the soil was needed annually for maintenance of SOC balance, and manure amendment was important for enhancement of SOC in small crop-livestock systems in which crop residue land application was limited.

关键词： Century model conservation tillage crop residue dryland soil organic carbon

Effects of Corn Stover Incorporated in Dry Farmland on Soil Fertility

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Agricultural Sciences in China 2001年第1期 95-101页

作者： wang xiao-bin Cai Dian-xiong ZHANG Jing-qing GAO Xu-ke Soil and Fertilizer Institute Chinese Academy of Agricultural Sciences Beijing 100081 Soil and Fertilizer Institute Chinese Academy of Agricultural Sciences Beijing 100081 Soil and Fertilizer Institute Chinese Academy of Agricultural Sciences Beijing 100081 Soil and Fertilizer Institute Chinese Academy of Agricultural Sciences Beijing 100081

Seven years' field experiments on application of corn stover and/or cattle manure combined with chemical fertilizers were carried out in Shouyang Dryland Farming Experimental Station. Results showed that the increased available N in the plough layer was mainly influenced by the application of cattle manure; the available P was mainly influenced by the application of chemical fertilizer; the available K was mainly influenced by the incorporation of corn stover. The organic matter contents in the soils treated with corn stover or cattle manure were kept in balance under the experimental conditions. Corn yield and water use efficiency were influenced significantly not only by fertilizer N but also by incorporated corn stover. The results suggested that the highest N uptake, yield and water use efficiency could be obtained at rates of 105 kg fertilizer N, 6000 kg corn stover, and 1500 kg cattle manure per hectare. The experiments supplied information on nutrient recycling and use of corn stover as sources of fodder and organic fertilizer for balancing application of organic and inorganic fertilizer, improving soil fertility and increasing crop yield with incorporation of corn stover in soil.

关键词： Corn Dryland Soil fertility Corn stover

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自动拨号报警图像监控系统的设计与实现

西安石油大学学报（自然科学版） 2011年第1期26卷 90-94,121-122页

作者：汪晓斌常州纺织服装职业技术学院信息技术系江苏常州213164

设计了一种图像监控系统,系统选取基于ARM7的处理器AT91SAM7x128,以μC/OS-II为操作系统.当系统巡逻信号被触发时,图像监控系统可以通过公用电话网自动拨号报警,图像可以通过串口摄像头模块C328采集,存储到U盘中.该设计突破了传统安防... 详细信息

设计了一种图像监控系统,系统选取基于ARM7的处理器AT91SAM7x128,以μC/OS-II为操作系统.当系统巡逻信号被触发时,图像监控系统可以通过公用电话网自动拨号报警,图像可以通过串口摄像头模块C328采集,存储到U盘中.该设计突破了传统安防报警系统的设计思想,为家庭、店铺等终端用户提供了较好的图像监控系统解决方案.

关键词：自动拨号报警图像监控 AT91SAM7x128 C328

基于改进BA模型的不同规模海运复杂网络演化研究

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交通运输系统工程与信息 2013年第2期13卷 103-110页

作者：王杰李雪王晓斌大连海事大学交通运输管理学院辽宁大连116026

以复杂网络理论为基础,分析海运网络的拓扑结构具有无标度网络特性,可运用BA无标度网络模型构建演化海运网络.连接概率是BA模型中节点优先连接的重要依据,据此,针对海运网络港口节点进行研究,通过加权量化和MATLAB编程将影响节点间连接... 详细信息

以复杂网络理论为基础,分析海运网络的拓扑结构具有无标度网络特性,可运用BA无标度网络模型构建演化海运网络.连接概率是BA模型中节点优先连接的重要依据,据此,针对海运网络港口节点进行研究,通过加权量化和MATLAB编程将影响节点间连接的因素组成节点吸引度,引入连接概率公式,改进了BA模型.分别选取2010年全球15个和25个主要集装箱港口的相关数据,运用上述改进BA模型分别得到不同规模的海运网络演化情况,演化结果验证了海运复杂网络具有无标度网络特征,呈现的特性与网络规模没有必然联系,规模大的网络平均路径更长、集聚性更强,度值相差更悬殊.进一步运用全球班轮航线实际网络进行验证,得到两者结构特性基本相同.

关键词：水路运输复杂网络海运网络演化网络规模改进BA模型连接概率

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农业立体污染及其防治研究的探讨

中国农业科学 2005年第2期38卷 350-357页

作者：章力建蔡典雄王小彬张建君金轲中国农业科学院中国农业科学院北京100081

概述了农业立体污染防治研究的由来、发展趋势,从不当农业生产措施导致水体-土壤-生物-大气圈层交叉污染不断升级,提出了我国农业立体污染的学术观点与防治理论,并提出了我国未来5～10年农业立体污染优先考虑的研究领域、研究重点及防... 详细信息

概述了农业立体污染防治研究的由来、发展趋势,从不当农业生产措施导致水体-土壤-生物-大气圈层交叉污染不断升级,提出了我国农业立体污染的学术观点与防治理论,并提出了我国未来5～10年农业立体污染优先考虑的研究领域、研究重点及防治技术措施。

关键词：农业立体污染污染防治综合研究