III. Buchbesprechungen     

J. N. Köstler  Huber  Speer  Schaile  Mägdefrau 《European Journal of Forest Research》1951,70(9):577-580

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Zum Auftreten von Schädlingen an Besenginster     

Revierförster Rudolf Gauß 《Journal of pest science》1950,23(5):72-73

Ohne Zusammenfassung  相似文献   

Vital staining of fungi in pure cultures and in soil with fluorescein diacetate     

B.E. Söderström 《Soil biology & biochemistry》1977,9(1):59-63

A method for vital staining of fungal mycelium with fluorescein diacetate (FDA) is described. In experiments with pure cultures, good correlation was obtained between relative staining efficiency, growth rate, and respiration. FDA thus appears to be a true vital stain, in that it stains only metabolically active mycelia.In fresh soil suspensions stained with FDA, brightly fluorescent hyphae and portions of hyphae were observed. The applicability of the method for measurement of active mycelium in the soil is discussed.  相似文献   

Zur pedochemie des berylliums — untersuchungen einer bodengesellschaft im gebiet des bärhaldegranits (südschwarzwald)     

K Keilen  K Stahr  H.v.d Goltz  H.W Zöttl 《Geoderma》1977,17(4):315-329

The profile distribution of Be is given for a toposequence of podzols, brown earths, stagnogley, forest bog and “Ockererde” (slope gley with infiltrated Al, Mn and Fe). Analysed were the parent rock, fine earth, four fractions of mineral soil (fine skeleton, sand, silt, clay) and the needles of spruce trees.Beryllium is involved in selective weathering processes of elements. Accordingly, the Be-content increases from the fine skeleton to sand, rock, silt and clay, progressively. Through pedogenetic enrichment, Be accumulates in the mica-rich silt fraction.Uptake of Be by spruce is very low even from these acid soils. The accumulation in the needles becomes greater with increasing age.The pedochemical behaviour of Be is very similar to that of Al.Be is incorporated very little in the organic matter cycle, and is therefore not enriched in the soil humus.The brown earth has lost Be, especially in the A_h-horizon.In the A_e-horizon of the podzol, loss of Be is even greater; the loss is partly offset by Be-enrichment in the B-horizon.In the profiles of depressions, the Be-content is high and is ascribed to lateral flow from the slopes. Be-enrichment is especially high in horizons with a pH of about 5.The Be-balance of the watershed indicates an export of about 10% of the original amount.  相似文献   

Host-plant specificity in the infection of cereals with Azospirillum spp     

Vera Lucia D. Baldani  Johanna Döbereiner 《Soil biology & biochemistry》1980,12(4):433-439

The specificity of the infection of maize, wheat and rice roots by N₂-fixing Azospirillum spp was studied in four greenhouse experiments using pots with unsterilized soil and in two field experiments. In all experiments A. lipoferum was most frequently isolated from externally sterilized roots of maize, and A. brasilense nir^? (nitrite reductase negative) from wheat and rice. In pot experiments, A. brasilense nir⁺ was isolated with moderate frequency from within maize roots but rarely from within wheat or rice roots. Inoculation of the pots with a mixture of representative strains of the three Azospirillum groups had no effect on the proportion of strains recovered from each plant species. In the field experiments, inoculation with spontaneous streptomycin-resistant mutants of two of the representative strains confirmed the apparent specificity of A. lipoferum for maize roots and of A. brasilense for wheat but the results were partially obscured by the unexpectedly high proportion of streptomycin-resistant strains isolated from within the roots of uninoculated plants.  相似文献   

Bericht über die Tagung der Sektion Pathologie in Wageningen (Niederlande) vom 2.–6. Juni 1980     

Dr. Bärbel Schöber 《Potato Research》1980,23(4):463-478

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Some problems in assessing the fluorescein diacetate-active fungal biomass in the soil     

B.E. Söderström 《Soil biology & biochemistry》1979,11(2):147-148

A technique for assessing the metabolically-active fungal biomass by means of fluorescein diacetate (FDA) staining was recently described (Söderström, 1977). In this note some practical details in the application of this technique to studies of FDA-active fungal biomass in the soil are discussed.  相似文献   

Zur Prüfung von Vorbeugungs- und Bekämpfungsmitteln gegen Termiten     

Karl Gösswald 《Journal of pest science》1943,19(3):30-34

Ohne Zusammenfassung Mit 10 Abbildungen  相似文献   

Altersermittlung beim Saatgut der Fichte und Kiefer     

Adil Göksin 《European Journal of Forest Research》1942,64(5):111-117

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III. Bücheranzeign     

Jabriciuz  Rohmeder  Röftler  Schüpfer  L. 《European Journal of Forest Research》1940,62(10):230-235

Ohne Zusammenfassung  相似文献