Einige ergänzende Ergebnisse zur Molybdänversorgung Thüringer Ackerböden     

Richard Ebeling  Karl-Heinz Müller  Bodo Witter  Werner Bergmann 《Archives of Agronomy and Soil Science》2013,59(12):1081-1086

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Erste Ergebnisse über den Einfluß der Kalkung saurer Böden auf Ertrag,Ca-, Mg-, Mn- und Mo-Gehalt von Kulturpflanzen sowie verfügbare Mengen dieser Nährstoffe im Boden     

Werner Bergmann  Karlheinz Beer  Walter Katzenberger  Alfred Prausse  Bodo Witter 《Archives of Agronomy and Soil Science》2013,59(10):931-945

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Volatile organic compounds produced by castor bean cake incorporated into the soil exhibit toxic activity against Meloidogyne incognita     

Luma A Pedroso  Vicente P Campos  Marcio P Pedroso  Aline F Barros  Eduardo S Freire  Franciely MP Resende 《Pest management science》2019,75(2):476-483

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Influence of non-cellulose structural carbohydrate composition on plant material decomposition in soil   总被引：1，自引：0，他引：1  

Sophie Gunnarsson  Håkan Marstorp  A Sigrun Dahlin  Ernst Witter 《Biology and Fertility of Soils》2008,45(1):27-36

The C mineralisation pattern during the early stage of decomposition of plant materials is largely determined by their content of different carbohydrates. This study investigated whether detailed plant analysis could provide a better prediction of C mineralisation during decomposition than proximate analysis [neutral detergent solution (NDF)/acid detergent solution (ADF)]. The detailed analysis included sugars, fructans, starch, pectin, cellulose, lignin and organic N. To determine whether differences in decomposition rate were related to differences in hemicellulose composition, the analysis particularly emphasised the concentrations of arabinose and xylose in hemicelluloses. Carbon dioxide evolution was monitored hourly in soil amended with ten different plant materials. Principal component and regression analysis showed that C mineralisation during day 1 was closely related to free sugars, fructans and soluble organic N components (R ² = 0.83). The sum of non-cellulose structural carbohydrates (intermediate NDF/ADF fraction) was not related to C mineralisation between days 1 and 9. In contrast, a model including starch and protein in addition to the non-cellulose structural carbohydrates, with the hemicelluloses replaced by arabinose and xylose, showed a strong relationship with evolved CO₂ (R ² = 0.87). Carbon mineralisation between days 9 and 34 was better explained by xylan, cellulose and lignin (R ² = 0.72) than by lignocellulose in the ADF fraction. Our results indicated that proximate analyses were not sufficient to explain differences in decomposition. To predict C mineralisation from the range of plant materials studied, we propose a minimum set of analyses comprising total N, free sugars, starch, arabinose, xylan, cellulose and lignin.  相似文献   

Hunting practices in northern Australia and their implication for disease transmission between community dogs and wild dogs     

V Gabriele‐Rivet  VJ Brookes  J Arsenault  MP Ward 《Australian veterinary journal》2019,97(8):268-276

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Experimental infection of turkeys and chickens with a herpesvirus of turkeys (HVT)     

R L Witter  J J Solomon 《Avian diseases》1972,16(1):34-44

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Attenuated revertant serotype 1 Marek's disease viruses: safety and protective efficacy.   总被引：2，自引：0，他引：2  

R L Witter 《Avian diseases》1991,35(4):877-891

In earlier studies, a revertant serotype 1 Marek's disease virus (MDV), clone Md11/75C/R2, was found to be a highly protective vaccine virus but was mildly pathogenic for susceptible chickens. The term "revertant" indicates that the virus, after attenuation, gained virulence following backpassage in chickens. The present study is an attempt to develop a more attenuated but still protective vaccine virus from Md11/75C/R2. Forty-two derivative viruses or clones from Md11/75C/R2 were evaluated. Two of these, designated clones R2/23 and R2/29, induced viremia but little or no pathology in preliminary trials and were selected for further study. In a series of nine trials, both clones provided protection against challenge with very virulent MDV strains that was superior to that induced by turkey herpesvirus (HVT) and was not significantly different (P greater than 0.05) from that induced by a bivalent (HVT + SB-1) vaccine. Both clones appeared fully attenuated based on pathogenicity tests in susceptible antibody-negative chickens. Both clones gained virulence on backpassage in chickens, but this seemed of little concern because neither virus spread by contact to other chickens. Although the two clones were very similar, clone R2/23 appeared to have a slightly lower pathogenic potential following backpassage and thus best meets the combined criteria of safety and efficacy.  相似文献   

The effects of changing wind regimes on the development of blowouts in the coastal dunes of The Netherlands     

P. D. Jungerius  J. V. Witter  J. H. van Boxel 《Landscape Ecology》1991,6(1-2):41-48

Blowouts are the main features of aeolian activity in many dune areas. To assess the impact of future climatic change on the geomorphological processes prevailing in a dune landscape it is essential to understand blowout formation and identify the meteorological parameters which are important.The development, that is, local erosion and accumulation, of six blowouts in a dune terrain along the Dutch coast has been related to wind velocity and wind direction, as measured at a nearby standard meteorological station. Blowout changes correlate best with wind velocities between 6.25 and 12.5 m/s (measured at 10 m height) which are the critical wind velocities for moving particles in the 0.15 to 0.42 mm range. These winds mostly blow from the southwest. Consequently, the blowouts are elongated in the same direction.Extreme aeolian events such as northwestern storms have little effect on blowout development compared to events which have a lower magnitude but occur with a higher frequency. An eventual shift towards higher effective wind velocities would probably result not in larger blowouts but in a break-down of the whole system, especially if this shift were accompanied by a change in wind direction. The accumulation of sand in the blowouts during storms should be seen as a first step of adaptation to a higher energy level.  相似文献   

Die Molybdänversorgung der Thüringer Böden und der Einfluß einer Molybdändüngung auf Ertrag,Rohprotein- und Mineralstoffgehalt von Luzerne     

Karl-Heinz Müller  Erhard Wuth  Bodo Witter  Richard Ebeling  Werner Bergmann 《Archives of Agronomy and Soil Science》2013,59(4-5):353-373

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Oestrogen and Progesterone Receptor Gene Expression in Canine Oocytes and Cumulus Cells Throughout the Oestrous Cycle     

JSA Gonçalves  CI Vannucchi  FC Braga  FF Paula-Lopes  MP Milazzotto  MEOA Assumpção  JA Visintin 《Reproduction in domestic animals》2009,44(S2):239-242

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