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  • Artikel  (11)
  • Manganese  (11)
  • 1990-1994
  • 1980-1984  (11)
  • 1945-1949
  • 1983  (11)
  • Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft  (11)
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  • Artikel  (11)
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  • 1990-1994
  • 1980-1984  (11)
  • 1945-1949
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  • Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft  (11)
  • Biologie  (2)
  • 1
    Digitale Medien
    Digitale Medien
    Soil moisture influence on micronutrient cation availability under aerobic conditions (1983)
    Springer
    Plant and soil 72 (1983), S. 77-83 
    Details
    ISSN: 1573-5036
    Schlagwort(e): Copper ; Gezira soils ; Iron ; Micronutrient availability ; Microbial activity ; Manganese ; Oxidation ; Zinc
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary The three major soil series comprising the Gezira scheme (Sudan) are Hosh, Suleimi, and Laota. Surface soil samples from each soil series were employed to study the effect of soil moisture on the DTPA-extractable micronutrient cation under aerobic conditions. The study continued for 8 weeks using an incubation technique at two levels of soil moisture (continuously moist and moist/dry cycles). The DTPA-extractable Cu, Fe, Mn and Zn from air-dry soil samples were much higher compared to values from their incubated counterparts. For the three soils the CO2 production (microbial activity) reached the maximum in 5 weeks and then levelled off while the lowest values of micronutrient cation from the incubated soils were obtained between 2 to 8 weeks. Generally, the study suggests that the hot dry months preceding crop growth should increase clay surface acidity and hence availability of mironutrient cations.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02185096
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Varietal differences in physiological and biochemical responses to changes in the ionic environment (1983)
    Springer
    Plant and soil 72 (1983), S. 245-259 
    Details
    ISSN: 1573-5036
    Schlagwort(e): Armeria ecotypes ; Armeria maritima ; Maize ; Magnesium ; Manganese ; Mannose ; Phosphate ; Sodium ; Zea mays
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary Experimental assessment of differences between cultivars of crop species or ecotypes of wild species from different localities in their capacities for ion absorption and transport is made difficult by the problem of obtaining seed material of comparable ionic content. When young seedlings are used this problem is particularly acute if the seeds of the different cultivars have not been raised under identical soil conditions. Propagation of material from ecotypes under controlled conditions is one approach to the solution of this problem. Six maize cultivars have been selected for similarity of phosphate content and the capacity for phosphate absorption from 5 μM KH2PO4 has been shown to vary by threefold whereas the proportion of the accumulated phosphate that reaches the shoot differs by much less. This level of phosphate supply approached that likely to induce deficiency and when the concentration is reduced to 1 μM differences in transport capacity of up to fourfold were observed when the rate of arrival at the tip of the first leaf was continuously monitored. The rapidity with which the transport is shut off by adding 1 mM D(+) mannose to the root environment also varies significantly indicating that sizeable differences in either the accumulation of mannose or the activity of phosphomannoisomerase exist in these cultivars. Ecotypes ofArmeria maritima collected from three sites, inland serpentine, inland mine dumps and coastal salt marsh were maintained as stock plants on the same peat mixture. Samples taken from these stocks were raised on a standard culture solution to provide genetically different material grown under constant conditions. The capacities for ion uptake were shown to differ very considerably and these differences were accentuated when the plants were grown in a range of concentrations of MgSO4, NaCl and MnSO4. The absorption of phosphate and its incorporation into nucleic acids were increased temporarily in the presence of 50 mM MgSO4 but the pattern of these changes was different in the three ecotypes. The absorption of Na, Cl, and Rb was measured after treatment with a range of concentrations of NaCl and the effect of treatment with MnSO4 on subsequent absorption of Mn and SO4 was also measured. The coastal plants were significantly more efficient in their absorption of these ions when treated at the lower levels of NaCl (0.5 and 10.0 mM). The short term absorption rates were not reflected in the overall accumulation of sodium over periods of 10 weeks and the coastal plants appeared to reduce the root content of sodium by transfer to the shoot and by increased active pumping to the exterior.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02181964
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  • 3
    Digitale Medien
    Digitale Medien
    Effect of soil salinity on the electro-chemical and chemical kinetics of some plant nutrients in submerged soils (1983)
    Springer
    Plant and soil 75 (1983), S. 455-472 
    Details
    ISSN: 1573-5036
    Schlagwort(e): Ammonification ; Eh ; Flooded soils ; Iron ; Manganese ; Nitrate reduction ; Phosphorus ; pH ; Salinity and extractable cations ; Zinc
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary The electro-chemical and chemical kinetics of six California rice soils were significantly influenced by the presence of salts up to an EC of 9 mmhos/cm in saturation extract (ECe). Subsamples of each soil salinity treatment were incubated for periods up to 10 weeks after flooding. Most of the changes in Eh and pH values took place in the first 3–4 weeks after submergence. Salinity decreased pH values, but slightly increased the redox-potential. Both ammonification and nitrate reduction were significantly decreased, by increasing soil salinity. Salinity up to 9 mmhos/cm did not affect levels of Bray and Kurtz extractable P, but increased the water extractable Ca, Mg, K and Mn. In DTPA extract, salinity in incubated soils had no effect on Zn in 4 soils, but it decreased Fe in acid and neutral soils. Possible explanations for the electro-chemical and chemical kinetic changes due to flooding and salinity are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02369980
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  • 4
    Digitale Medien
    Digitale Medien
    Relationship between P and Mn in chickpea (Cicer arietinum L.) (1983)
    Springer
    Plant and soil 72 (1983), S. 85-90 
    Details
    ISSN: 1573-5036
    Schlagwort(e): Chickpea ; Manganese ; Phosphorus ; Yield
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary Phosphorus and Mn relationship was studied in chickpea at two stages of growth in pot culture using 0, 7.5, 15 and 30 ppm P and 0, 5, 10 and 15 ppm Mn. The dry matter yield increased with P at both stages of growth. Manganese improved the yield only in the first stage. Initial levels of Mn enhanced while higher levels had a depressing effect on tissue P. Addition of 7.5 ppm P enhanced Mn concentration at first stage and at higher levels a marked reduction in Mn content was observed at both the stages.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02185097
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  • 5
    Digitale Medien
    Digitale Medien
    Factors responsible for genotypic manganese tolerance in cowpea (Vigna unguiculata) (1983)
    Springer
    Plant and soil 72 (1983), S. 213-218 
    Details
    ISSN: 1573-5036
    Schlagwort(e): Cowpea ; Genotypical differences ; Manganese ; Manganese tolerance ; Manganese toxicity ; Vigna unguiculata
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Abstract In experiments with 29 cowpea genotypes considerable variation in Mn tolerance could be found. Ranking according to Mn tolerance was almost the same in sand and water culture. Mn tolerance is not related to greater vigour or exclusion of Mn from uptake and translocation, but depends mainly on the internal tolerance to excess Mn especially in the leaf tissue. Growth depression by Mn excess is characterized by local accumulatiòn of Mn, deposition of Mn oxides, and typical macro-symptoms on the older leaves (brown spots→clorosis→shedding of the leaves). Autoradiographic studies with54Mn and extraction of the leaves with methanol and H2O indicate a causal relationship between Mn tolerance and the more homogenous distribution of Mn in the tissue. In tolerant genotypes local accumulation and deposition of Mn is inhibited or retarded. Mn applied to the petioles of fully expanded leaves induces the same toxicity symptoms on the leaf blades as Mn absorbed by the roots. There is a good agreement between the rankings of the different genotypes for Mn tolerance according to the depression of shoot dry matter production by Mn excess in long term pot experiments and the appearance of toxicity symptoms after application of Mn to the petioles. The regulation of Mn tolerance at the leaf tissue level allows a quick and non-destructive screening of large numbers of genotypes for Mn tolerance.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02181959
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  • 6
    Digitale Medien
    Digitale Medien
    Plant genotype differences in the uptake, translocation, accumulation, and use of mineral elements required for plant growth (1983)
    Springer
    Plant and soil 72 (1983), S. 175-196 
    Details
    ISSN: 1573-5036
    Schlagwort(e): Boron ; Calcium ; Copper ; Genotypic differences ; Iron ; Magnesium ; Manganese ; Mineral nutrition ; Molybdenum ; Nitrogen ; Phosphorus ; Plant adaptation ; Plant breeding ; Potassium ; Zinc
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Abstract Plant genotypes differ in their uptake, translocation, accumulation, and use of mineral elements. Examples of genotype differences to iron, nitrogen, phosphorus, potassium, calcium, magnesium, manganese, boron, copper, zinc, and molybdenum are discussed. Current knowledge is sufficient to indicate that many crop plants can be improved for the efficient use of mineral elements and better adaptation to mineral stress conditions.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02181957
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  • 7
    Digitale Medien
    Digitale Medien
    Nutrient inflows into apple roots (1983)
    Springer
    Plant and soil 71 (1983), S. 371-380 
    Details
    ISSN: 1573-5036
    Schlagwort(e): Apple ; Calcium ; Copper ; Iron ; Irradiance ; Magnesium ; Manganese ; Nitrogen ; Nutrient uptake rate ; Phosphorus ; Potassium ; Scion effects ; Season ; Source of nitrogen ; Temperature ; Tissue nutrient level ; Zinc
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary The rates of uptake of nutrients from solution by apple roots were measured (a) in a root laboratory, using intact roots of mature trees growing under field conditions and (b) in controlled environment using young trees. Maximum nitrate inflows into Discovery/M.9 roots under field conditions were only slightly lower than those into roots of the same genotype in controlled environment, but up to 80 times lower than those into roots of Worcester Pearmain seedlings. At any given external P concentration, P inflows into roots of field-grown trees were about 2.5-times lower than those into the roots of young trees in controlled environment. Nitrate inflows were constant above a solution concentration of 20 mmol m−3 in both field-grown and small trees. In both cases, phosphate inflows increased linearly with solution concentration up to 10 mmol m−3. Among the various plant and environmental factors influencing nutrient uptake characteristics of apple roots were: the scion genotype, tissue nutrient levels, root origin, the form in which N is supplied, level of irradiance of the shoot, root temperature and the season of the year. The effects of these factors are illustrated with examples.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02182678
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  • 8
    Digitale Medien
    Digitale Medien
    A comparison of the cation/anion balance of ten cultivars ofTrifolium subterraneum L., and their effects on soil acidity (1983)
    Springer
    Plant and soil 75 (1983), S. 235-243 
    Details
    ISSN: 1573-5036
    Schlagwort(e): Anions ; Ash alkalinity ; Cations ; Cultivars ; Manganese ; pH ; Subterranean clover ; Trifolium subterraneam
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary Ten cultivars of subterranean clover were grown in pots on a poorly buffered, sandy soil of pH 4.9; the plants were dependent throughout upon symbiotic fixation for their supply of N. There were some marked increases in soil acidity which resulted in changes in pH of 0.76 to 1.08 (mean 0.94) units. Increasing soil acidity was associated with an increasing total content of excess cations,i.e. (Ca2+++Mg2++K++Na+)−(H2PO 4 t- +SO 4 2- +Cl−), which ranged from 15.8 to 21.9 meq pot−1. The differences between the cultivars in their effects on acidity were largely related to differences in growth rather than to marked differences in the concentration of total cations or inorganic anions. There was no obvious grouping amongst the ten cultivars in terms of either their effects on soil pH, or on their uptake of manganese.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02375569
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  • 9
    Digitale Medien
    Digitale Medien
    Total concentrations of Mn, Zn and Cu in certain forest soils in Greece (1983)
    Springer
    Plant and soil 74 (1983), S. 137-140 
    Details
    ISSN: 1573-5036
    Schlagwort(e): Copper ; Forest soils ; Greece ; Manganese ; Total concentrations ; Zinc
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary Total concentrations of Mn, Zn and Cu were determined in soil samples from 144 profiles located in remote forested areas throughout the mainland of Greece. Bio-accumulation of Mn and Zn in the humic horizon took place only in moderately acid soils (pH 5–6). Mean concentrations of Mn, Zn and Cu, in the mineral section of the soil profiles, were 1383, 93, and 51 ppm, respectively. Soils from hard limestone and basic and ultrabasic igneous rock contain these three minor elements at significantly higher concentrations compared to soils from the rest of the soil parent materials. In most of the soil profiles concentration of Cu increased, and of Mn decreased, with soil depth. Concentrations of Mn, Zn and Cu in the underlaying “rocks” were within the range of their average concentrations found in the mineral soil, except for hard limestone where much lower concentrations of these elements have been found. The latter supports the theory that the parent material of soils associated with limestones might not be a solution product of the limestone rock.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02178750
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  • 10
    Digitale Medien
    Digitale Medien
    Manganese and iron interactions on their uptake and distribution in soybean (Glycine max (L.) Merr.) (1983)
    Springer
    Plant and soil 70 (1983), S. 317-326 
    Details
    ISSN: 1573-5036
    Schlagwort(e): Glycine max (L.) Merr. ; Iron ; Manganese ; Soybean
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary The uptake and distribution of iron and manganese were studied in a manganese-sensitive soybean cultivar (‘Bragg’) grown over a range of supply levels of these nutrients in solution culture. At high (90 and 275 μM) manganese levels, increasing the iron concentration in solution from 2 to 100 μM partially overcame the effects of manganese toxicity. Interactions between manganese and iron occurred for dry matter yields, rate of Mn absorption by the roots, and the proportions of manganese and iron transported to the tops. No interaction was observed for the rate of root absorption of iron. The percentage distribution of manganese in the plant top increased with increasing iron, despite a reduced rate of Mn uptake. On the other hand, iron uptake was independent of solution Mn concentration and increased with increasing solution Fe. Also more iron was retained in the roots at high Mn and/or Fe levels in solution. Concentrations of manganese and iron in roots, stems and individual leaves were affected independently by the manganese and iron supplyi.e. without any interaction occurring between the two elements. In general, the concentration in a plant part was related directly to the solution concentration. Symptoms resembling iron deficiency correlated poorly with leaf Fe concentrations whereas high levels of manganese were found in leaves displaying Mn toxicity symptoms.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02374888
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  • 11
    Digitale Medien
    Digitale Medien
    The acquisition of phosphorus byLupinus albus L. (1983)
    Springer
    Plant and soil 70 (1983), S. 391-402 
    Details
    ISSN: 1573-5036
    Schlagwort(e): Intercropping Lupins ; Lupinus albus ; Manganese ; Nitrogen ; Phosphorus ; Triticum aestivum ; Wheat
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary Significant interactions between wheat and lupins occur below ground and wheat intercropped with lupins has access to a larger pool of available P, Mn and N than has wheat grown in monoculture. This suggests that the wheat is able to take up nutrients produced or made available by lupins grown in association with it.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02374894
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