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Characteristics of Heavy Metal Circulation in Biosphere

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Agricultural Science & Technology 2014年第4期15卷 642-647页

作者： dewu zeng Kailin ZHU Xiaodong PEI Liuyang County Tobacco Company of Hunan Province

In order to control heavy metal pollution effectively, this paper reviews heavy metal source and transport characteristics in heavy metal circulation in bio- sphere, including geochemical cycle and biological cycle of heavy metals. The inter- body of geochemical cycle of heavy metals includes soil, gas as well as water body, and the interbody of biological cycle of heavy metals includes environment, plant, microorganisms and animals. As to macro-cycle, transportation character in each interbody is different. Heavy metal circulation in different interbody interacts with each other and is in dynamic balance. Heavy metals in soil include two parts, i.e. active and inert forms, which are in dynamic equilibrium. This equilibrium may be affected by different physicochemical factors. Heavy metal content at different soil depth reflects historical accumulation level of heavy metal. In contrast to agri- cultural eco-system itself, industrial and urban activities are of great menace. Fluvial transport and atmospheric input are significant pathways of heavy metal circulation. Sludge plays an accumulative role of heavy metals, and can release its heavy met- als to water body causing secondary pollution. Balance of heavy metal immobiliza- tion and release is interrupted by physicochemical characters and microbial activity. Temperature can influence atmospheric heavy metal content, and volatile heavy meal precipitation is an indLspensable source in soil and water body. In regard to micro-cycle, plants is the main part in heavy metal cycle, microorganisms play roles in accelerator and animals in recipient. Specific transportation and assigned location of heavy metal in plants are adopted to keep internal heavy metal equilibrium.

关键词： Heavy metal Geochemical cycle Biological cycle Transport process

Development of Customized Production Machine for Flue-cured Tobacco Formula Nutritional Soil

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Asian Agricultural Research 2021年第5期13卷 43-47页

作者： Jianyong LI Jianwen WANG Mengxiang PENG LiLI Jiongjiong ZHAO Liangjiao LIU dewu zeng Liuyang Branch of Changsha Tobacco Company Changsha 410302 China

On the basis of full investigation and repeated trials,nutritional soil composed of cake fertilizer,mushroom residue,cow dung and calcium magnesium phosphate fertilizer was determined as an alternative for traditional flue-cured tobacco fired ash *** accordance with the feed grinding,mixing and processing integrated principle,processing machine for flue-cured tobacco nutritional soil was *** clogging problem of mixing box was solved by improving grinding and stirring method of mixing *** and large-scale production and commercialized supply of flue-cured tobacco nutritional soil was piloted to simplify the production process and reduce the production cost of nutritional soil for flue-cured tobacco and meet the needs of green development of tobacco production,thereby creating good social and economic benefits.

关键词： Flue-cured tobacco Nutritional soil Formula Processing machinery

Analysis of Growth Laws of Leaves of Flue-cured Tobacco in Various Periods

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Agricultural Science & Technology 2017年第9期18卷 1653-1657页

作者： Liangjiao LIU Li LI Cui WANG Jianyong LI Chungui TANG dewu zeng Liuyang Branch of Changsha Tobacco Company Changsha 410302China Changsha Tobacco Company Changsha 410003China

The growth laws of leaves of flue-cured tobacco in different positions in various periods were summarized. The results showed that the growth speed of new leaves of flue-cured tobacco increased constantly until their growth was the fastest, and then it reduced irreversibly. The length and width of leaves in each position increased fastest when they grew depending on photosynthates instead of or- ganic compounds from functional leaves. Therefore, it is concluded that the increases of leaf length, width and area, and dry matter, and the peak of photosynthetic rate appear successively during the process of leaves of flue-cured tobacco, and the leaf area correction coefficient of leaves of flue-cured tobacco is related to the shape of leaves, which are affected by leaf position and the variety of flue-cured tobacco. The study can provide scientific reference for further research on the growth laws of leaves of flue-cured tobacco.

关键词： Flue-cured tobacco Leaf position Leaves Growth laws

德夯岩溶河谷异质生境中半蒴苣苔的水分生理生态适应性

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中国岩溶 2024年第4期43卷 900-910页

作者：王晨瑶张婷曾德武李龙叶庆子田向荣吉首大学生物资源与环境科学学院湖南吉首416000 武陵山区植物资源保护与利用湖南省高校重点实验室湖南吉首416000 湘西世界地质公园湖南吉首416000 杜仲综合利用技术国家地方联合工程实验室湖南吉首416000

以湘西世界地质公园德夯岩溶河谷内克隆植物半蒴苣苔(Hemiboea subcapitata)为材料,测定其生长、形态与光合水分生理指标,探究其对德夯岩溶台地河谷演化中形成的三类异质生境(峡谷岩壁表面、风化碎裂岩表和河岸有机质层)的水分生理生态... 详细信息

以湘西世界地质公园德夯岩溶河谷内克隆植物半蒴苣苔(Hemiboea subcapitata)为材料,测定其生长、形态与光合水分生理指标,探究其对德夯岩溶台地河谷演化中形成的三类异质生境(峡谷岩壁表面、风化碎裂岩表和河岸有机质层)的水分生理生态适应性。结果显示:(1)异质生境中半蒴苣苔单(分)株叶片自然含水量仅有较小差异(风化碎裂岩表>河岸有机质层的趋势;峡谷岩壁表面单株叶片比河岸有机质层单株平均增厚近60μm,比叶面积则降低至其78.2%,气孔密度则显著降低至其66%。(4)光合生理指标中,叶片气孔限制值随叶片水势降低而显著增加,同时气孔导度明显提升,故而胞间CO_(2)浓度并无明显变化,但峡谷岩壁表面单株叶片的净光合速率仅达到河岸有机质层单株叶片的69.6%。(5)水分亏缺最多的峡谷岩壁表面单株叶片水分利用效率却最低(3.029±0.461μmol CO_(2)·mmol^(-1)H_(2)O),仅为河岸有机质层单株的73%。表明,半蒴苣苔可通过自身水分维持机制来保证岩溶异质生境中单株水分的相对稳定,并以增加根系密度、匍匐茎长度、叶片厚度和重量,减少气孔密度等形态可塑性来适应干旱的岩溶岩壁生境,通过增加气孔导度保持蒸腾拉力来维持胞间CO_(2)浓度,以高耗水来维持生长状态相对稳定的方式达成对岩溶河谷水分异质性生境的适应。

关键词：岩溶河谷半蒴苣苔水分利用效率水分生理生态适应

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烟草重金属污染及其防控措施研究进展

中国烟草科学 2014年第1期35卷 127-132页

作者：曾德武李帆赵建武朱开林裴晓东长沙市烟草公司浏阳市分公司湖南浏阳410300

探讨了重金属污染对烟草生长发育、烟叶品质、生理代谢及细胞结构等方面的影响,阐述了烟草对重金属的转运及分布规律,并对防控修复措施及未来研究方向提出了建议。

关键词：重金属污染烟草生长烟叶品质防控措施

高望界国家级自然保护区野生观赏植物资源调查分析

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中国野生植物资源 2020年第5期39卷 58-62,78页

作者：曹巧曾德武刘娜黄昀连家莹刘世彪吉首大学生物资源与环境科学学院湖南吉首416000

对高望界国家级自然保护区野生观赏植物资源进行野外实地调查,并分析保护区野生观赏植物资源的特征。结果表明,保护区内具有野生观赏植物89科157属199种,其中蕨类植物4科4种,木本植物58科130种,草本植物37科65种,蔷薇科、唇形科、兰科... 详细信息

对高望界国家级自然保护区野生观赏植物资源进行野外实地调查,并分析保护区野生观赏植物资源的特征。结果表明,保护区内具有野生观赏植物89科157属199种,其中蕨类植物4科4种,木本植物58科130种,草本植物37科65种,蔷薇科、唇形科、兰科、豆科和樟科的种类所占比例较多。从观赏类型分析,以观花草本植物的种类最为丰富,达51种,观果木本植物次之,有39种,观花木本植物38种,以观形观叶草本植物、观果草本植物、草质藤本植物和蕨类植物较少。旨在对保护区野生观赏植物资源的价值进行探讨,并对其保护和开发利用提出建议。

关键词：野生观赏植物资源调查高望界国家级自然保护区

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烤烟配方营养土定制化生产机械研制

农业工程 2020年第12期10卷 18-22页

作者：李建勇王建文彭孟详李立赵冏炅刘良教曾德武长沙市烟草公司浏阳分公司湖南长沙410302

在充分调查论证和反复试验基础上,确定以饼肥、菌渣、牛粪和钙镁磷肥的配方营养土替代传统烤烟火土灰配方营养土。根据饲料粉碎搅拌加工一体化原理,研制烤烟营养土加工机械。针对混制箱的堵塞问题,通过改进混制系统的粉碎和搅拌方式予... 详细信息

在充分调查论证和反复试验基础上,确定以饼肥、菌渣、牛粪和钙镁磷肥的配方营养土替代传统烤烟火土灰配方营养土。根据饲料粉碎搅拌加工一体化原理,研制烤烟营养土加工机械。针对混制箱的堵塞问题,通过改进混制系统的粉碎和搅拌方式予以消除。试点机械化、规模化制作烤烟营养土,商品化供应烟农,简化烟农营养土制作工序,降低烟农营养土制作成本,满足烟叶生产规模化降本增效和烟叶生产绿色发展的需要,具有较好的社会和经济效益。

关键词：烤烟营养土配方加工机械

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简洁无电感忆阻混沌电路及其特性

电子与信息学报 2020年第4期42卷 862-869页

作者：曾以成成德武谭其威湘潭大学物理与光电工程学院湘潭411105

采用非理想有源电压控制忆阻器和磁通控制型光滑3次非线性忆阻器,该文设计了一种不含电感的简单(只含5个电子元器件)双忆阻混沌电路。采用常规的非线性分析手段详细研究了电路参数变化时系统的基本动力学行为,例如平衡点稳定性分析,相... 详细信息

采用非理想有源电压控制忆阻器和磁通控制型光滑3次非线性忆阻器,该文设计了一种不含电感的简单(只含5个电子元器件)双忆阻混沌电路。采用常规的非线性分析手段详细研究了电路参数变化时系统的基本动力学行为,例如平衡点稳定性分析,相轨图以及李雅普诺夫指数谱和分岔图等。通过调节系统控制参数,该系统可产生多涡卷、多翼以及暂态混沌等十分丰富的动力学现象。此外,还研究了系统依赖于忆阻器初始状态的多稳态,得到了一些有意义的结果。为验证电路的可行性及稳定性,通过对忆阻器的模拟等效电路的搭建,并将该等效电路应用于所提出的混沌电路中,硬件电路实验结果以及Multisim电路仿真结果与理论分析一致。

关键词：忆阻器混沌电路多稳态暂态混沌

Nature and timing of a prehistoric giant landslide on the eastern margin of the Tibetan Plateau

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Journal of Mountain Science 2020年第6期17卷 1438-1451页

作者： ZHAO Xun WANG Yun-sheng WANG Shi-yuan ZHAO Bo zeng Lu LIU Yu FENG Qian-qian State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of TechnologyChengdu 610059China Sichuan Earthquake Agency Chengdu 610041China Key Laboratory of Mountain Hazards and Earth Surface Processes Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610041China

Studying the characteristics of a prehistoric giant landslide and ascertaining its relationship with palaeo-seismic events could provide useful information on the role of regional tectonic activities in hillslope ***,a giant palaeoseismic landslide(GPSL),namely,the Luanshibao(LSB)landslide,located on the eastern margin of the Qinghai-Tibet Plateau,was investigated to ascertain its characteristics and occurrence *** relationship between occurrence age and palaeoseismic episodes was also discussed by using 14 C dating on the adjacent active faults,including the regional Yidun-Litang-dewu(YD-LT-DW)fault zone,which crossed the LSB *** dating of multiple samples acquired from palaeo-seismic trenches revealed that at least 5 palaeo-seismic episodes had occurred in the vicinity of the LSB landslide over the last 5000 *** occurrence age of the LSB landslide(3635±387 a BP)coincides with palaeo-seismic episode I,and the LSB landslide is convincingly inferred to have been triggered during episode I,which reached a seismic intensity(Chinese scale)of at least degree VII near the LSB landslide during *** timing of a second reactivation phase coincides with palaeo-seismic episode IV,which occurred at 2100-2200 a *** study could provide reference for studying the regional palaeoseismic activities and palaeo landslide evolution near the Litang area.

关键词： Prehistoric landslide Active fault zone Palaeo-seismic episode Dating