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Soil Organic Carbon Mineralization as Affected by Cyclical Temperature Fluctuations in a Karst Region of Southwestern China

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Pedosphere 2015年第4期25卷 512-523页

作者： CI en Mahdi M.AL-KAISI WANG Liange DING Changhuan XIE Deti college of resources and environment Southwest University Department of Agronomy Iowa State University

The diurnal fluctuation in soil temperature may influence soil organic carbon （SOC） mineralization, but there is no consensus on SOC mineralization response to the cyclical fluctuation in soil temperature. A 56-d incubation experiment was conducted to investigate the effects of constant and variable temperatures on SOC mineralization. Three soils were collected from the karst region in western Guizhou Province, southwestern China, including a limestone soil under forest, a limestone soil under crops and a yellow soil under crops. According to the World Reference Base （WRB） classification, the two limestone soils were classified as Haplic Luvisols and the yellow soil as a Dystric Luvisol. These soils were incubated at three constant temperatures （15, 20 and 25 ℃） and cyclically fluctuating temperatures （diurnal cycle between 15 and 25 ℃）. The results showed that the 56-d cumulative SOC mineralized （C56） at the fluctuating temperatures was between those at constant 15 and 25 ℃, suggesting that the cumulative SOC mineralization was restricted by temperature range. The SOC mineralization responses to the fluctuating temperatures were different among the three soils, especially in contrast to those at constant 20 ~C. Compared with constant 20 ℃, significant （P 〈 0.05） decreases and increases in C56 value were found in the limestone soil under forest and yellow soil under crops at the fluctuating temperatures, respectively. At the fluctuating temperatures, the forest soil with lower temperature coefficient Q10 （the relative change in SOC mineralization rate as a result of increasing the temperature by 10 ℃） had a significantly （P 〈 0.05） lower SOC mineralization intensity than the two cropland soils. These indicated that differences in temperature pattern （constant or fluctuating） could significantly influence SOC mineralization, and SOC mineralization responses to the fluctuating temperatures might be affected by soil characteristics. Moreover, the warmer temperatures mi

关键词： labile C limestone soil recalcitrant C temperature coefficient (Q10) yellow soil

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Tourism resource assessment and spatial analysis of wine tourism development： a case study of the eastern foothills of China＇s Helan Mountains

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Journal of Mountain Science 2018年第3期15卷 645-656页

作者： WANG Lei LIU Jia-ming WANG Ling-en ZHU He LIN Jing Institute of Geographic sciences and Natural resources Research Chinese Academy of Sciences Beijing 100101 China college of Humanities Ningxia University Yinchuan 750021 China Key Laboratory of Regional Sustainable Development Modeling Chinese Academy of Sciences Beijing 100101 China University of Chinese Academy of sciences Beijing 100049 China

The reasonable development and utilization of mountainous regions closely relates to local economic development and ecological security. The wine production region in the eastern foothills of the Helan Mountains in Ningxia, Ningxia Hui Autonomous Region, with its excellent terroir, is emerging as one of China's three major geographical attractions. Based on surveys of tourism resources and spatial analysis for this wine producing region, we propose a highly representative and practicable path for wine tourism development. Based on China's national standard in Classification, Investigation and Evaluation of Tourism resources(GB/T 18972-2003), which recommended the types and grades of tourism resources in one area, we conduct an analysis of resource characteristics and the current state of development. Using Arc GIS software, spatialautocorrelation analysis, average nearest neighbor analysis, as well as clustering and outlier analysis, we are able to derive the spatial distribution characteristics of tourism resources. Our survey showed that tourism resources in this area are relatively abundant and have good quality and clear combination advantages. Nonetheless, there are resources shortage for wine tourism and poor integration of wine production with the tourism industry. Regarding the spatial distribution of resources, we revealed the current states of and issues surrounding regions with concentrated resources, as well as characteristics of this clustering. Finally, we proposed a development path for wine tourism in this region based on the five dimensions of management mode, industrial path, product development, spatial optimization, and market development.

关键词： Development path Helan Mountains Resource assessment Wine tourism

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Integrating a model with remote sensing observations by a data assimilation approach to improve the model simulation accuracy of carbon flux and evapotranspiration at two flux sites

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Science China Earth sciences 2016年第2期59卷 337-348页

作者： ZHANG TingLong SUN Rui PenG ChangHui ZHOU GuoYi WANG ChunLing ZHU QiuAn YANG YanZheng college of resources and environmental Science Northwest A&F University Laboratory of Ecosystems Forecasting and Global Change College of Forestry Northwest A&F University State Key Laboratory of Remote Sensing Science Co-sponsored by Beijing Normal University and IRSA School of Geography and Remote Sensing sciences Beijing Normal University Institute of environment sciences Department of Biological Sciences University of Quebec at Montreal South China Botanical Garden Chinese Academy of Sciences

Model simulation and in situ observations are often used to research water and carbon cycles in terrestrial ecosystems, but each of these methods has its own advantages and limitations. Combining these two methods could improve the accuracy of quantifying the dynamics of the water and carbon fluxes of an ecosystem. Data assimilation is an effective means of integrating modeling with in situ observation. In this study, the ensemble Kalman filter(en KF) and the unscented Kalman filter(UKF) algorithms were used to assimilate remotely sensed leaf area index(LAI) data with the Biome-BGC model to simulate water and carbon fluxes at the Harvard Forest environmental Monitoring Site(EMS) and the Dinghushan site. After MODIS LAI data from 2000–2004 were assimilated into the improved Biome-BGC model using the en KF algorithm at the Harvard Forest site, the R2 between the simulated and observed results for NEE and evapotranspiration increased by 7.8% and 4.7%, respectively. In addition, the sum of the absolute error(SAE) and the root mean square error(RMSE) of NEE decreased by an average of 21.9% and 26.3%, and the SAE and RMSE of evapotranspiration decreased by 24.5% and 25.5%, respectively. MODIS LAI data of 2003 were assimilated into the Biome-BGC model for the Dinghushan site, and the R2 values between the simulated and observed results for NEE and evapotranspiration were increased by 6.7% and 17.3%, respectively. In addition, the SAE values of NEE and ET were decreased by 11.3% and 30.7%, respectively, and the RMSE values of NEE and ET decreased by 10.1% and 30.9%, respectively. These results demonstrate that the accuracy of carbon and water flux simulations can be effectively improved when remotely sensed LAI data are properly integrated with ecosystem models through a data assimilation approach.

关键词： Net ecosystem exchange ensemble Kalman filter Unscented Kalman filter Biome-BGC model Leaf area index

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Global land 1° mapping dataset of XCO_(2) from satellite observations of GOSAT and OCO-2 from 2009 to 2020

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Big Earth Data 2023年第1期7卷 170-190页

作者： Mengya Sheng Liping Lei Zhao-Cheng Zeng Weiqiang Rao Hao Songd Changjiang Wu Key Laboratory of Digital Earth Science Aerospace Information Research InstituteChinese Academy of SciencesBeijingChina college of resources and environment University of Chinese Academy of SciencesBeijingChina Division of Geological and Planetary sciences California Institute of TechnologyPasadenaCaliforniaUSA School of Earth sciences China University of GeosciencesBeijingChina

A global mapping data of atmospheric carbon dioxide(CO_(2))concen-trations can help us to better understand the spatiotemporal varia-tions of CO_(2) and the driving factors of the variations to support the actions for emissions reduction and *** gases satel-lites that measure atmospheric CO_(2),such as the Greenhouse Gases Observing Satellite(GOSAT)and Orbiting Carbon Observatory(OCO-2),have been providing global observations of the column averaged dry-air mole fractions of CO_(2)(XCO_(2))since ***,these XCO_(2) retrievals are irregular in space and time with many *** this paper,we mapped a global spatiotemporally continuous XCO_(2) data-set(Mapping-XCO_(2))using the XCO_(2) retrievals from GOSAT and OCO-2 during the period from April 2009 to December 2020 based on a geostatistical approach that fills those data *** dataset covers a geographic range from 56°S to 65°N and 169°W to 180°E for a 1°grid interval in space and 3-day time *** uncer-tainties of the mapped XCO_(2) values are generally less than 1.5 parts per million(ppm).The spatiotemporal characteristics of global XCO_(2) that are revealed by the Mapping-XCO_(2) are similar to the model data obtained from *** to the ground observa-tions,the overall standard bias is 1.13 *** results indicate that this long-term Mapping-XCO_(2) dataset can be used to investigate the spatiotemporal variations of global atmospheric XCO_(2) and can support studies related to the carbon cycle and anthropogenic CO_(2) *** dataset is available at http://***/10.7910/DVN/4WDTD8 and https://***/en/detail?dataSetId=c2c3111b421043fc8d9b163c39e6f56e.

关键词： Global land mapping atmospheric CO_(2)column concentration satellite observation GOSAT OCO-2

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Development of the Supply Chain Oriented Quality Assurance System for Aerospace Manufacturing SMEs and Its Implementation Perspectives

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Chinese Journal of Mechanical engineering 2016年第6期29卷 1067-1073页

作者： HUSSEIN Abdullahi CHenG Kai college of engineering Design and Physical Sciences Brunel University London

Aerospace manufacturing SMEs are continuously facing the challenge on managing their supply chain and complying with the aerospace manufacturing quality standard requirement due to their lack of resources and the nature of business. In this paper, the ERP system based approach is presented to quality control and assurance work in light of seamless integration of in-process production data and information internally and therefore managing suppliers more effectively and efficiently. The Aerospace Manufacturing Quality Assurance Standard （BS/en9100） is one of the most recognised and essential protocols for developing the industry-operated-and-driven quality assurance systems. The research investigates using the ERP based system as an enabler to implement BS/en9100 quality management system at manufacturing SMEs and the associated implementation and application perspectives. An application case study on a manufacturing SME is presented by using the SAP based implementation, which helps fiarther evaluate and validate the approach and application system development.

关键词： BS/en 9100 Quality Assurance aerospace manufacturing ERP system aerospace quality assurance SAP programming

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Accumulation of cadmium and copper by female Oxya chinensis (Orthopera: Acridoidea) in soil-plant-insect system

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Journal of environmental sciences 2006年第2期18卷 341-346页

作者： LI Li-jun LIU Xue-mei DUAN Yi-hao GUO Ya-ping CHenG Bin GUO Jun XI Yu-ying MA en-bo Institution of Soil Science and Fertilizer Shanxi Academy of Agriculture Sciences Taiyuan 030031 China college of Life Science and Technology Shanxi University Taiyuan 030006 China School of environmental Science and resources Taiyuan 030006 China

One purpose of this research is to present accumulation of cadmium （Cd） and copper （Cu） by female Oxya chinensis （Orthopera： Acridoidea） in a simulated soil-plant-insect ecosystem treated with Cd. Fourth-instar nymphs of O. chinensis had been fed on wheat （Triticurn aestivum） seedlings contaminated with Cd and Cu for one month. In the ecosystem, the Cd concentration in wheat seedlings rose greatly with the increasing of Cd in the soil, but the Cu concentration in wheat seedlings was not found elevated. There was a highly significant difference（P〈0.05） in Cd concentrations of wheat seedlings and not any significant difference（P〉0.05） in Cu concentrations of wheat seedlings. The Cd and Cu concentration in different body part-head, thorax, abdomen, and hind femur, varied under different Cd concentrations in soil. There were significant differences （P〈0.05） in the four parts of Cd and Cu accumulations with all treatments. The order of Cd accumulation was thorax 〉abdomen 〉head 〉hind femur and the Cu was abdomen 〉thorax 〉 head〉hind femur. The results indicated that Cd and Cu were accumulated from the soil to grasshoppers through the plant; that is to say, Cd and Cu in environment could be transported to animal or human via food chain.

关键词： accumulation cadmium(Cd) copper(Cu) grasshopper(Oxya chinensisi) soil-plant-insect ecosystem

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Pedigree tracing of Fenneropenaeus chinensis by microsatellite DNA markers genotyping

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Acta Oceanologica Sinica 2006年第5期25卷 151-156,157页

作者： DONG Shirui KONG Jie ZHANG Qingwem LIU Ping MenG Xianhong WANG Rucai college of Life sciences and Technology Ocean University of China Qingdao 266003 China Key Laboratory of Ministry of Agriculture for Sustainable Utilization of Marine Fisheries resources Yellow Sea Fisheries Research Institute Chinese Academy of Fishery Sciences Qingdao 266071 China

Two microsateUite DNA loci were used to trace the pedigree structure of six families in the shrimp Fenneropenaeus chinensis. Four of the families were natural mating, and the others were mated by artificial insemination. Eleven alleles were acquired at two microsatellite DNA loci （locus RS0622 and locus en0033 ） by investigating 145 offsprings and 11 parents. Five alleles were acquired from locus RS0622 and six from locus en0033. As analyzed, the gene frequencies were between 0. 024 1 and 0. 493 1, the heterozygosity was 0.652 2 and 0.688 8, and the polymorphism information content （PIC） was 0.585 7 and 0.652 9 for the locus RS0622 and the locus en0033, respectively. Twenty-three genotypes were detected and the genotypes of the losing parents were also inferred. The pedigrees of three F1 and three F2 generations were determined by matching the genotype at each locus.

关键词： Fenneropenaeus chinensis microsateUite pedigree genotype

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A Feasible Atmospheric Correction Method to TM Image

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Journal of China University of Mining and Technology 2007年第1期17卷 112-115页

作者： ZHenG Wei LIU Chuang ZenG Zhi-yuan LONG en Institute of Geographical sciences and Natural resources Research Chinese Academy of Sciences Beijing 100101 China Graduate University of Chinese Academy of sciences Beijing 100039 China college of Geographical Science Nanjing Normal University Nanjing Jiangsu 210097 China

In this paper, an atmospheric correction method to TM image is presented, which can simulate the atmospheric correction parameters, such as optical depth, sky radiance and path radiance at the time the satellite passes,by using interpolation among local meteorological records, parameterization models and dark pixels. The TM image of the Nanjing area in China was corrected by this method. For analyzing the accuracy of this method, the calculated reflectance, apparent reflectance and ground measured reflectance were compared. NDVI before and after atmospheric cor- rection were also compared. The results show that the method is applicable and efficient in the visible to near infrared band of TM image. In order to improve the accuracy of the method, the infrared spectrum measured data for the two other bands of TM image are required in future field investigations. The method is suitable to many other satellite optical remote sensing images with the same or similar spectral characteristics of TM images.

关键词： atmospheric correction remote sensing image TM image

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Nitrogen uptake and transfer in broad bean and garlic strip intercropping systems

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Journal of Integrative Agriculture 2018年第1期17卷 220-230页

作者： TANG Qiu-xiang Haile Tewolde LIU Hong-bin Ren Tian-zhi JIANG Ping-an ZHAI Li-mei LEI Bao-kun LIN Tao LIU en-ke college of Agronomy Xinjiang Agricultural University Institute of Agricultural resources and Regional Planning Chinese Academy of Agricultural Sciences/Key Laboratory of Nonpoint Source Pollution ControlMinistry of Agriculture Crop Science Research Laboratory USDA-ARS Agro-environmental Protection Institute Ministry of Agriculture Institute of Agriculture environmental resources Research Yunnan Academy of Agricultural Sciences Institute of Industrial Crops Xinjiang Academy of Agricultural Sciences Institute of environment and Sustainable Development in Agriculture Chinese Academy of Agricultural Sciences

Utilization and transfer of nitrogen （N）in a strip intercropping system of garlic （Allium safivum L.） and broad bean （Vicia faba L.） have been investigated rarely. The objectives of this study were to quantify N uptake and utilization by intercropped broad bean and garlic and determine the magnitude of N transfer from broad bean to garlic. Field and pot trials were carried out in the Erhai Lake Basin in China using ^15N tracer applied to the soil or injected into broad bean plants. Strip intercropping of garlic and broad bean increased N absorption （47.2%） compared with sole crop broad bean （31.9%） or sole crop garlic （40.7%） and reduced soil residual N. Nearly 15% of 15N injected into petioles of broad bean intercropped with garlic was recovered in garlic at harvest, suggesting that N could be transferred from broad bean to strip intercropped garlic. The findings provide a basis for evaluating legumes＇ role in optimizing N fertilization when intercropped with non-legumes.

关键词： legumes sole crop 1SN abundance nitrogen isotope rhizoshpere

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Land cover changes based on plant successions: Deforestation, rehabilitation and degeneration of forest in the upper Dadu River watershed

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Science China Earth sciences 2005年第12期48卷 2214-2230页

作者： YAN Jianzhong1,2,3, ZHANG Yili1, BAI Wanqi1, LIU Yanhua4, BAO Weikai5, LIU Linshan1, 2 & ZHenG Du1 1. Institute of Geographic sciences and Natural resources Research, Chinese Academy of sciences, Beijing 100101, China 2. Graduate School of the Chinese Academy of sciences, Beijing 100039, China 3. college of resources and environment, Southwest Agricultural University, Chongqing 400716, China 4. The Ministry of Science and Technology, P. C. China, Beijing 100862, China 5. Chengdu Institute of Biology, Chinese Academy of sciences, Chengdu 610041, China 1. Institute of Geographic sciences and Natural resources Research Chinese Academy of Sciences 100101 Beijing China 2. Graduate School of the Chinese Academy of sciences 100039 Beijing China 3. college of resources and environment Southwest Agricultural University 400716 Chongqing China 4. The Ministry of Science and Technology P. C. China 100862 Beijing China 5. Chengdu Institute of Biology Chinese Academy of Sciences 610041 Chengdu China

To link regional land use/cover changes with environmental effects, land cover changes are required to reflect vegetation successions, whereas the land cover classification systems commonly used nowadays cannot serve this purpose. In this paper, a new land cover classification system is established in which land covers are classified by the vegetation succes-sions, taking Zamtang County, Barkam County and Jinchuan County in the upper Dadu River watershed as a study area. Using multi-temporal remote sensing images, the land cover data of 1967, 1986 and 2000 are obtained by means of integration of unsupervised classification and visual interpretation methods. The database facilitates the study of land use/cover changes, en-vironmental effects and ecological construction. Land cover changes reflect the main ecological processes in the upper Dadu River watershed. The landscape composed mainly of grasslands, wildwoods and alpine scrubs in 1967 was changed to that of grasslands, secondary forests, al-pine scrubs, fragmentary wildwoods, artificial forests, secondary scrubs in 2000, meanwhile, the landscape got more fragmentized. The total area of the forests decreased by 9.43%. Study results have shown the process of restoration of logged areas in forest centers. From 1967 to 2000, only 6.86 percents of logged areas were converted to shrubs, meadows or crop-lands, and the rest were converted into artificial forests or secondary forests. So the ecological shelter functions will be restored, stage by stage. Firewood collection, charcoal production and overgrazing are the three major triggers for the extensive degradation of alpine oak forests, Sa-bina tibetica forests and meadows. The arid valley grasslands expanded too. The degradation of vegetation in the southern slopes impairs ecological shelter functions and affects livelihood of local residents, so it is essential to find effective measures for ecological restoration and recon-struction. Field investigations have found

关键词： land use/cover classification, upper Dadu River watershed, vegetation successions, GIS, RS.

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