Klee- und Kleegras-Ertrags- und -Vorfruchtprüfungen im Erzgebirge Teil II: Aussaatzeiten,Bestandsentwicklung     

W. Simon  D. Eich  K. Werner 《Archives of Agronomy and Soil Science》2013,59(5):382-398

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Problematik und erste Ergebnisse der Müncheberger Höchstertragsversuche     

Erich Rübensam  Dietrich Eich 《Archives of Agronomy and Soil Science》2013,59(8):749-758

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Suspected paraspinal abscess and spinal epidural empyema in a dog     

Cherrone KL  Eich CS  Bonzynski JJ 《Journal of the American Animal Hospital Association》2002,38(2):149-151

Epidural spinal cord compression was visualized myelographically in a dog presented for rapid development of paraparesis. A large, fluid-filled pocket in the epaxial musculature was found at surgery and appeared to communicate with the first lumbar vertebra. Unfortunately, cytopathological evaluation of the fluid was not performed. No etiological agents were isolated on aerobic culture. The dog responded well to decompressive surgery and medical therapy consisting of antibiotics, pain medication, and nursing care. In the veterinary literature, only two studies of spinal epidural empyema in the dog have been reported. Of these dogs, one had successful decompressive surgery performed. The other dogs in these two reports were euthanized. The dog presented in this report fully recovered. Spinal epidural empyema should be considered as a differential diagnosis in dogs presenting with a fever and a rapidly progressing myelopathy.  相似文献   

Recovery of 15N Labelled Urea as Affected by Fixation of Ammonium by Clay Minerals     

Huating Dou  Diedrich Steffens 《植物养料与土壤学杂志》1995,158(4):351-354

A greenhouse experiment was conducted with Lolium perenne to determine whether ammonium (NH₄⁺-N) fixation by clay minerals can increase the recovery of nitrogen following application of ¹⁵N labelled urea. A silty loam subsoil, B_t horizon from an Alfisol derived from loess, pH (CaCl₂) 7.9, was chosen for the experiment. The NH₄⁺-N fixation capacity was altered by varying the distribution of potassium (K) in the upper and lower soil layer. In the K₀ treatment (control), the upper soil layer fertilized with urea was not supplied with K, whereas the lower soil layer was fertilized with 300 mg K kg^?1 soil. In the K₁^?, K₂^? and K₃ treatment the upper soil was supplied with 100-, 200- and 300 mg K kg^?1 soil, respectively. The soil in the lower layer of the K₃ treatment was not supplied with K. The recovery of ¹⁵N from applied urea (¹⁵N uptake of Lolium perenne plus residual soil ¹⁵N_t) was 86.1% in the K₀ treatment and 75.2%, 69.1% and 69.6% in K_1-, K_2- and K₃ treatments, respectively, showing that ¹⁵N losses were smallest in the K₀ treatment. Two weeks after applying ¹⁵N labelled urea the amounts of nonexchangeable ¹⁵NH₄⁺-N in the upper soil layer were significantly higher in the K₀ treatment than in the treatments with K application. Apparently, NH₄⁺-N fixation by clay minerals can reduce NH₃ volatilization after urea fertilization, if the amount of exchangeable K is low.  相似文献   

Proton release by N2‐fixing plant roots: A possible contribution to phytoremediation of calcareous sodic soils     

Manzoor Qadir  Diedrich Steffens  Feng Yan  Sven Schubert 《植物养料与土壤学杂志》2003,166(1):14-22

With a world‐wide occurrence on about 560 million hectares, sodic soils are characterized by the occurrence of excess sodium (Na⁺) to levels that can adversely affect crop growth and yield. Amelioration of such soils needs a source of calcium (Ca²⁺) to replace excess Na⁺ from the cation exchange sites. In addition, adequate levels of Ca²⁺ in ameliorated soils play a vital role in improving the structural and functional integrity of plant cell walls and membranes. As a low‐cost and environmentally feasible strategy, phytoremediation of sodic soils — a plant‐based amelioration — has gained increasing interest among scientists and farmers in recent years. Enhanced CO₂ partial pressure (P_CO2) in the root zone is considered as the principal mechanism contributing to phytoremediation of sodic soils. Aqueous CO₂ produces protons (H⁺) and bicarbonate (HCO₃^‐). In a subsequent reaction, H⁺ reacts with native soil calcite (CaCO₃) to provide Ca²⁺ for Na⁺ Ca²⁺ exchange at the cation exchange sites. Another source of H⁺ may occur in such soils if cropped with N₂‐fixing plant species because plants capable of fixing N₂ release H⁺ in the root zone. In a lysimeter experiment on a calcareous sodic soil (pH_s = 7.4, electrical conductivity of soil saturated paste extract (EC_e) = 3.1 dS m^‐1, sodium adsorption ratio (SAR) = 28.4, exchangeable sodium percentage (ESP) = 27.6, CaCO₃ = 50 g kg^‐1), we investigated the phytoremediation ability of alfalfa (Medicago sativa L.). There were two cropped treatments: Alfalfa relying on N₂ fixation and alfalfa receiving NH₄NO₃ as mineral N source, respectively. Other treatments were non‐cropped, including a control (without an amendment or crop), and soil application of gypsum or sulfuric acid. After two months of cropping, all lysimeters were leached by maintaining a water content at 130% waterholding capacity of the soil after every 24±1 h. The treatment efficiency for Na⁺ removal in drainage water was in the order: sulfuric acid > gypsum = N₂‐fixing alfalfa > NH4NO3‐fed alfalfa > control. Both the alfalfa treatments produced statistically similar root and shoot biomass. We attribute better Na+ removal by the N₂‐fixing alfalfa treatment to an additional source of H⁺ in the rhizosphere, which helped to dissolve additional CaCO₃ and soil sodicity amelioration.  相似文献   

Phosphate availability from phosphate rock as related to nitrogen form and the nitrification inhibitor DMPP   总被引：1，自引：0，他引：1  

Rahmatullah  Maqsood A. Gill  Alexander H. Wissemeier  Diedrich Steffens 《植物养料与土壤学杂志》2006,169(5):675-678

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Carl Sprengel – 150 Jahre „Bodenkunde”︁–     

Diedrich Schroeder 《植物养料与土壤学杂志》1987,150(1):51-53

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Repair of diaphyseal femoral fractures in cats using interlocking intramedullary nails: 12 cases (1996-2000).     

A Larin  C S Eich  R B Parker  W P Stubbs 《Journal of the American Veterinary Medical Association》2001,219(8):1098-1104

OBJECTIVE: To determine the outcome of femoral fractures repaired with 4.0- and 4.7-mm interlocking intramedullary nails in cats. DESIGN: Retrospective study. ANIMALS: 12 cats with diaphyseal femoral fractures. PROCEDURE: Records of all cats in which the 4.0- and 4.7-mm interlocking nail system was used for repair of diaphyseal femoral fractures at the Animal Medical Center and Florida Veterinary Specialists between 1996 and 2000 were reviewed. Information included signalment, type of fracture, size of the implant, details of the surgery, intra- and postoperative complications, fracture healing, and clinical outcome. RESULTS: Femoral fractures in 12 cats were repaired. Eleven of the fractures were comminuted, with 2 of these being open. Clinical outcome was excellent in 7 cats, good in 3, and fair in 1. One resulted in a nonunion. Complications included screw breakage (1 cat) and fracture distal to the nail (1). Fracture distal to the nail occurred from a second trauma. CONCLUSION AND CLINICAL RELEVANCE: Use of the interlocking nail has been limited in cats because of the small diameter of the medullary canal. Use of the 4.0-mm nail will allow for greater application of this implant in small patients. Results of this study indicate that the 4.0- and 4.7-mm interlocking nails can be used to repair simple or comminuted diaphyseal femoral fractures in cats.  相似文献   

Der Einfluß der uni- bzw. bilateralen Salpingektomie auf die Implantation beim Kaninchen     

S. Al-Hasani  H. van  der Ven K. Diedrich  U. Hamerich  F. Lehmann  D. Rrebs 《Reproduction in domestic animals》1984,19(3):145-148

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Comment on "Nonreciprocal light propagation in a silicon photonic circuit"     

Fan S  Baets R  Petrov A  Yu Z  Joannopoulos JD  Freude W  Melloni A  Popović M  Vanwolleghem M  Jalas D  Eich M  Krause M  Renner H  Brinkmeyer E  Doerr CR 《Science (New York, N.Y.)》2012,335(6064):38; author reply 38

We show that the structure demonstrated by Feng et al. (Reports, 5 August 2011, p. 729) cannot enable optical isolation because it possesses a symmetric scattering matrix. Moreover, one cannot construct an optical isolator by incorporating this structure into any system as long as the system is linear and time-independent and is described by materials with a scalar dielectric function.  相似文献