Guideline for the description of soils in the Berlin metropolitan area: an extension for surveying and mapping anthropogenic and natural soils in urban environments within the German soil classification system     

Makki  Mohsen  Thestorf  Kolja  Hilbert  Sabine  Thelemann  Michael  Makowsky  Lutz 《Journal of Soils and Sediments》2021,21(5):1998-2012

Journal of Soils and Sediments - In urban areas, humans shape the surface, (re-)deposit natural or technogenic material, and thus become the dominant soil formation factor. The 2015 edition of the...  相似文献   

The role of polymerase chain reaction and its newer developments in feline medicine     

Lutz H  Leutenegger C  Hofmann-Lehmann R 《Journal of Feline Medicine and Surgery》1999,1(2):89-100

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聚合条件对羧甲基纤维素、玉米淀粉双母体高吸水性树脂性能的影响     

李蜀眉  田维平  塔娜  温国华  刘润芝  李佳  目仁更 《内蒙古农业大学学报(自然科学版)》2008,29(2)

采用自由基聚合法,以过硫酸铵为引发剂,N,N'-亚甲基双丙烯酰胺为交联剂,羧甲基纤维素及玉米淀粉与丙烯酸进行自由基接枝共聚合成吸水剂.并详细考察了中和丙烯酸时,KOH的用量及中和度对高吸水性树脂吸收能力的影响.实验表明:丙烯酸的中和度为95%时,高吸水性树脂对纯水、自来水和生理盐水的吸收率有最高值,分别是592g/g、300g/g和99g/g.当氢氧化钾的中和百分比为1%时,高吸水性树脂对纯水、自来水和生理盐水有最高吸收率,分别为630g/g、340g/g和95g/g.  相似文献   

Prey preferences of notonectids towards larval mosquitoes across prey ontogeny and search area     

Arpita Dalal  Ross N Cuthbert  Jaimie TA Dick  Susmita Gupta 《Pest management science》2020,76(2):609-616

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Pesticide contamination of the upper Elbe River and an adjacent floodplain area     

Karlsson  Anneli S.  Lesch  Michael  Weihermüller  Lutz  Thiele  Björn  Disko  Ulrich  Hofmann  Diana  Vereecken  Harry  Spielvogel  Sandra 《Journal of Soils and Sediments》2020,20(4):2067-2081

Journal of Soils and Sediments - Pesticide contamination of river waters is a global problem, and therefore, authorities regularly monitor the water quality status. Especially, flood events might...  相似文献   

工厂化水产养殖水质监测系统   总被引：1，自引：0，他引：1  

肖瑞超  位耀光  他旭翔  张龙 《水产学杂志》2017,(5):51-56

工厂化水产养殖的密度高、风险大,养殖对象对pH、溶解氧、温度、氨氮、亚硝酸盐等水质参数的变化敏感,受影响严重,监测水质参数极为重要。本文针对工厂化水产养殖水质监测特点和需求,研发了工厂化水产养殖水质监测系统。分析研究pH、溶解氧、温度、亚硝酸盐等水质参数的阈值,设计水质监测数据无线采集节点和基于Zigbee的无线监测网络,建立水质监测系统软件平台。结果表明,该系统能够实现工厂化水产养殖水质实时监测,保证生产安全,提高水产养殖生产效率。  相似文献   

Einfluss selektiver mechanischer Fruchtbehangsregulierung auf Ethylensynthese als Stressindikator sowie Ertrag und Fruchtqualität bei Kernobst     

Ting Kong  Lutz Damerow  Michael Blanke 《Erwerbs-Obstbau》2009,51(2):39-53

The overall objective of this work was to improve fruit quality, break alternate bearing and reduce hand thinning using fewer chemicals in fruit crops. A device was constructed for mechanical thinning, which consisted of three independent horizontal rotors with ropes and freely adjustable angles on a frame, mounted on a front three point hitch and powered by the tractor hydraulics. This can be adapted to any fruit tree trained as spindle, Solaxe, (tall) vertical axis or fruit wall (le mur fruitier) irrespective of rootstock employed. Rotor speed varied from 300 to 460?rpm at either 5 or 7.5?km/h tractor speed. Eight-year-old or twelve-old apple trees cvs. ‘Gala’ and ‘Golden Delicious’ were mechanically thinned in 2007 between pink bud and full bloom (flower bud stages 6–8 or F1–F2) near Bonn, Germany; non-thinned and hand-thinned apple trees of the same block and variety served as control. Mechanically thinned flowering branches showed a similar amount of ethylene efflux (0.4–0.6?ppm C₂H₄/branch) as non-thinned flower branches, preventing potentially unexpected subsequent fruit drop, except for those removed by the rotors. The impact of the horizontal rotors on the branches was from the upper side and removed excessive flowers right to the tree trunk viz. the centre of the tree canopy, where fruits of lesser quality are expected leaving 2–3 flowers per cluster. Leaf damage was less than??10%, even at the fast rotor speed of 420?rpm, which was associated with negligible wood injury. Mechanical thinning induced firmer and sweeter fruit, i.e. tastier apples with longer shelf life, relative to control fruit from non-thinned apple trees. The greatest efficacy in terms of final fruit quality in the grading/sorting was achieved by a rotor speed of 360?rpm at a tractor speed of 5?km/h: Fruit mass increased by up to 20?g and the proportion of fruit larger than 70–75?mm by 10–30% compared with the fruit from non-thinned trees. Mechanical thinning with this newly constructed device led to a 10–20% reduction in yield, but increased returns due to better fruit size and colouration in apple with the potential to overcome alternate bearing.  相似文献   

Combining agent-based and stock-flow modelling approaches in a participative analysis of the integrated land system in Reichraming, Austria   总被引：1，自引：0，他引：1  

Veronika Gaube  Christina Kaiser  Martin Wildenberg  Heidi Adensam  Peter Fleissner  Johannes Kobler  Juliana Lutz  Andreas Schaumberger  Jakob Schaumberger  Barbara Smetschka  Angelika Wolf  Andreas Richter  Helmut Haberl 《Landscape Ecology》2009,24(9):1149-1165

The integrated modelling of coupled socio-ecological systems in land-change science requires innovative model concepts capable of grasping the interrelations between socioeconomic and natural components. Here, we discuss the integrated socio-ecological model SERD (Simulation of Ecological Compatibility of Regional Development) that was developed for the municipality of Reichraming in Upper Austria in a participative 2-year process involving local stakeholders. SERD includes three main components: (1) an agent-based actors module that simulates decisions of farmsteads, the municipal administration and other important actors; (2) a spatially explicit (GIS based) land-use module that simulates land-use change at the level of individual parcels of land and (3) an integrated socio-ecological stock-flow module that simulates carbon and nitrogen flows through both socioeconomic and ecological system compartments. We report on outcomes of a scenario analysis that outlines possible future trajectories depending on both external (e.g. agricultural subsidies and prices) and internal (e.g. innovation, willingness to co-operate) factors. We find that both external and internal factors can affect the behaviour of the integrated system considerably. Local and regional policies are found to be able to counteract adverse global socioeconomic conditions to some extent, but not to reverse the trend altogether. We also find strong interdependencies between socioeconomic and ecological components of the system. Fully evaluating these interdependencies is, however, not possible at the local scale alone and will require explicit consideration of higher-level effects in future research.  相似文献   

Übersicht der außeralpinen Waldgesellschaften Süddeutschlands     

J. L. Lutz 《European Journal of Forest Research》1949,68(2):76-114

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III. Buchbesprechungen     

von Pechmann  Huber  H. Waldbauer  J. L. Lutz  Ernst  Speer  E. Weiger 《European Journal of Forest Research》1951,70(12):760-768

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