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  • 1980-1984  (9)
  • 1960-1964
  • 1905-1909
  • 1800-1809
  • 1980  (9)
  • Phosphorus
  • 1
    Digitale Medien
    Digitale Medien
    Parathyroid hormone and calcitonin in glucose regulation (1980)
    Springer
    European journal of pediatrics 135 (1980), S. 195-198 
    Details
    ISSN: 1432-1076
    Schlagwort(e): Glucose ; Insulin ; Calcium ; Phosphorus ; Parathyroid hormone ; Calcitonin
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Blood glucose, insulin, calcium (Ca), phosphorus (P), parathyroid hormone (PTH) and calcitonin (CT) were evaluated in 8 normal children, aged 17–41 months, during an oral glucose load; in 7 normal children, aged 15–42 months, during i.v. glucose infusion; and in 6 normal children, aged 19–40 months, during glucagon administration. During the oral glucose tolerance tests the mean maximum decline of Ca (8.63%) and P (12.66%) was at 120 min, while PTH and CT significantly increased from basal values of 1.36 ng/ml ±0.21 and 97 pg/ml±14 to 2.20 ng/ml±0.22 and 140 pg/ml±13, respectively. During the i.v. glucose tolerance tests the mean maximum decline of Ca was 12.12% at 15 min, and that of P 15.2% at 30 min. PTH and CT levels rose significantly from basal values of 1.16 ng/ml±0.25 and 86 pg/ml±12 to 2.83 ng/ml ±0.51 and 133 pg/ml±13, respectively, at 45 min. During i.v. glucagon administration the mean maximum decline of Ca (9.64%) and P (12.28%) was at 30 min. PTH levels rose significantly from basal values of 1.2 ng/ml±0.22 to 2.1 ng/ml±0.32 at 45 min, while CT increased rapidly from basal levels of 90 pg/ml±14 to 127 pg/ml at 15 min. In conclusion, increases in glucose and insulin due to ingestion or infusion of glucose, or to glucagon injection, are therefore not only associated with a fall in serum Ca and P but also with rises in PTH and CT.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00441641
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  • 2
    Digitale Medien
    Digitale Medien
    Cation exchange capacity of plant roots in relation to nutrients uptake by shoot and grain as influenced by age (1980)
    Springer
    Plant and soil 55 (1980), S. 215-224 
    Details
    ISSN: 1573-5036
    Schlagwort(e): CEC ; Iron ; Manganese ; Nitrogen ; Organic matter ; Paddy ; Phosphorus ; Potassium ; Uptake
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary Four varieties of each paddy and wheat crops were grown in pots to see their cation exchange capacities of roots and their relationships with the uptake of nutrients by shoot and grain at different physiological growth stages. The results are summarised, as follows: (i) The cation exchange capacity of roots was maximum at tillering stage which continued to decrease with an increase in the age of plants. At early stages of plant growth, significant differences in the root CEC of different varieties of paddy and wheat were recorded but the differences became almost narrow in later stages of plant life and ultimately the CEC of roots became almost similar, in all the varieties as the crops reached to maturity. Higher root CEC of paddy varieties were observed than wheat varieties throughout their physiological growth. (ii) Uptake of phosphorus, potassium, iron and manganese by shoot and grain was found significantly and positively correlated with the CEC of roots in most of the varieties of both, paddy and wheat crops throughout their plant life.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02181801
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  • 3
    Digitale Medien
    Digitale Medien
    Influence of different fertilizers on nett gain or loss of soil nitrogen in long-term manure and fertilizer applications (1980)
    Springer
    Plant and soil 57 (1980), S. 159-165 
    Details
    ISSN: 1573-5036
    Schlagwort(e): Crop rotations ; Fertilizers ; Lime ; Manures ; Nitrogen ; Nutrient ; Phosphorus ; Potassium ; Removal ; Weedicide
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary The nett gain or loss of total soil nitrogen was worked out from a long-term manure and fertilizer experiment conducted for seven years and still continuing at Ranchi Agricultural College, Kanke, Ranchi India. The total nitrogen in soil showed a deficit balance where lower and unbalanced doses of fertilizers were applied. Increasing levels of fertilizer combinations with lime removed the highest amount of nitrogen in intensive cropping. The nett loss was highest (95 kg/ha) in case of control, at 100% NPK the nett gain was 37 kg N per ha, and at 150% NPK 72 kg N per ha which was the highest.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02211675
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  • 4
    Digitale Medien
    Digitale Medien
    Effects of acid irrigation and liming on two clones of Norway spruce (1980)
    Springer
    Plant and soil 57 (1980), S. 305-321 
    Details
    ISSN: 1573-5036
    Schlagwort(e): Aluminium ; Acid precipitation ; Calcium ; Calcium carbonate ; Clone ; Iron ; Magnesium ; Manganese ; Nitrogen ; Picea abies ; Phosphorus ; Potassium ; Sulphate ; Sulphur
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary The effect of acid irrigation on the growth of rooted cuttings ofPicea abies (L.) Karst, was investigated in a pot experiment lasting 3 years. It involved two clones of Norway spruce, H 253 Bogstad I and H 254 Bogstad II. Irrigation water of pH 5.4, 4.0, 3.0 and 2.5 was used. Liming was included in the experiment. After the experimental period, the plants of all treatments were growing reasonably well. However, those plants irrigated at pH 2.5 were slightly discoloured. The plant mortality was only 3% throughout the experiment, and was not connected to acid irrigation. The limiting growth factor was N. All other nutrient elements measured in the plants were close to optimal concentration. Plants irrigated at pH 2.5, and to some extent at pH 3, contained excessively high concentrations of Al, t-S and SO4. The total amount of Ca, Fe and Mn taken up by the plants decreased with increasing soil acidity. The increased growth of clone H 254 relative to H 253, produces a corresponding impression on soil characteristics. Soil acidity is governed by acid irrigation and CaCO3 application, but the clonal effects are also of importance. Norway spruce appears to be tolerant to Al concentrations as high as 50 mmol/kg in the needles.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02211689
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  • 5
    Digitale Medien
    Digitale Medien
    Distribution of selected elements within flax plants as affected by FeEDDHA (1980)
    Springer
    Plant and soil 54 (1980), S. 153-158 
    Details
    ISSN: 1573-5036
    Schlagwort(e): Linum usitatissimum ; Manganese toxicity ; Iron-manganese antagonism ; Iron-zinc antagonism ; Phosphorus
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary Flax growing on a calcareous soil in the greenhouse developed Mn toxicity symptoms. The toxicity was eliminated by application of 2 ppm FeEDDHA-Fe. FeEDDHA had major effects on distribution of Mn, Zn, Fe and P among selected plant parts. Application of the chelate reduced Mn concentration in older leaves, the tissue most susceptible to Mn toxicity, associated stem tissue, plant tops, and roots from 2295 to 133 ppm, 62 to 7 ppm, 550 to 34 ppm, and 42 to 34 ppm, respectively. Analysis of older leaves is recommended for diagnosing Mn toxicity in flax. FeEDDHA reduced Zn concentration in plant tops and this was chiefly reflected in greatly reduced leaf concentrations, especially in older leaves. FeEDDHA increased plant Fe concentration and the effect was greatest in root and older leaf tissues. The overall effect of FeEDDHA on P concentration was small but large increases occurred in younger leaf tissue due to application of the chelate. Relative distributions of K, Na, Ca, and Mg among plant parts were only slightly affected by FeEDDHA.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02182008
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  • 6
    Digitale Medien
    Digitale Medien
    Effects of artificial acid rain on decomposition of spruce needles and on mobilisation and leaching of elements (1980)
    Springer
    Plant and soil 56 (1980), S. 365-378 
    Details
    ISSN: 1573-5036
    Schlagwort(e): Acid rain ; Calcium ; Decomposition ; Leaching ; Magnesium ; Manganese ; Mobilisation ; Nitrogen ; Phosphorus ; Potassium ; Spruce litter
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary Dry matter and chemical changes in decomposing spruce needles were investigated after 16 and 38 weeks in laboratory lysimeters treated with distilled water or distilled water acidified to pH 3 or 2 with sulphuric acid. The water was added twice weekly in quantities equal to 100 or 200 mm month−1. The CO2 evolution and leaching of P, K, Mg, Mn, and Ca was followed together with pH measurements of the leachate. The loss of dry matter was approximately 25% during the first 16 weeks and approximately 37% after 38 weeks. At the first samling, 16 weeks, the amount of material decomposed was greater from the lysimeters given 100 mm month−1 of water. At this water quantity dilute sulphuric acid increased the decomposition. After 38 weeks sulphuric acid at pH 3 and 2 had decreased the decomposition at 200 mm month−1. However, the effects of acid application were small. The effect of treatment using acidified water on the content of monosaccharides was not consistent, whereas there was an indication of reduced decomposition of lignin when treated with 200 mm water month−1 at pH 3 and 2. Nitrogen was conserved in the lysimeters with small differences between the various treatments. The order of mobility of metal elements was K〉Mg〉Mn〉Ca. Increasing the quantity of water increased the leaching of K especially, whereas addition of dilute sulphuric acid increased the leaching of Mg, Mn and particularly Ca. During the first 16 weeks of the experiment, sulphuric acid reduced the leaching of P while later on this treatment increased the leaching. The pH of the leachate from the lysimeters treated with distilled water was initially 4.0–4.6 increasing to approximately 6.6 after 22 weeks. The pH of the decomposed needle material was 4.6 and approximately 5.2 after 16 and 38 weeks respectively. When treated with water at pH 3 the pH of the leachate was between 4 and 5, and the pH of the needles 4.2–5.1. Treatment with water at pH 2 gave a leachate with pH just above 2 and decreased the pH of the needles that had received 200 mm ‘rain’ month−1 to 2.9. The effect of the artificial acid rain appears to be more pronounced on the leaching of metal elements than on the biological activity and the dynamics of N and P. The treatments must be considered extreme when compared with the acidity of natural rain.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02143031
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  • 7
    Digitale Medien
    Digitale Medien
    Hydroponic sand culture systems for mycorrhizal research (1980)
    Springer
    Plant and soil 57 (1980), S. 297-303 
    Details
    ISSN: 1573-5036
    Schlagwort(e): Glomus fasciculatus ; Hydroponics ; Mycorrhiza ; Phosphorus ; Sand cultures ; Tomato
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary Tomato plants were inoculated withGlomus fasciculatus mycorrhizal fungi while growing in sand through which recycled nutrient solution was automatically passed several times daily. Concentration of P and N in the solution were maintained at relatively low levels. Roots of inoculated plants became highly infected with mycorrhizal fungi, and yield parameters were significantly increased with inoculation over uninoculated control plants.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02211688
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  • 8
    Digitale Medien
    Digitale Medien
    The role of boron in plant response to mycorrhizal infection (1980)
    Springer
    Plant and soil 57 (1980), S. 431-438 
    Details
    ISSN: 1573-5036
    Schlagwort(e): Alfalfa ; Boron ; Clover ; Gigaspora ; Glomus ; Mycorrhizae ; Nutrientinteractions ; Phosphorus
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary In a Morrison sandy loam marginal in boron, fertilization with 1.1 ppm boron increased the shoot dry weight of mycorrhizal red clover (Trifolium pratense L.) an average of 16%, but did not affect nonmycorrhizal clover weight. Root colonization and foliar phosphorus concentrations were not significantly affected by B deficiency. With alfalfa (Medicago sativa L.) and Morrison soil in which B deficiency had been intensified by the addition of 100 ppm nitrogen as NH4NO3, inadequate B reduced the shoot dry weight of mycorrhizal plants 71%vs a reduction of 35% for nonmycorrhizal plants. Boron deficiency was more severe in the earlier cuttings and delayed the onset of mycorrhizal infection and the subsequent spread of mycorrhizal fungi within the roots. This delay may contribute to the lower concentrations of P and Cu seen by others during early developmental stages of B-deficient alfalfa.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02211700
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  • 9
    Digitale Medien
    Digitale Medien
    Aluminium effects on growth and Al, Ca, Mg, K and P levels in triticale, wheat and rye (1980)
    Springer
    Plant and soil 57 (1980), S. 467-470 
    Details
    ISSN: 1573-5036
    Schlagwort(e): Aluminum concentration ; Aluminum toxicity ; Calcium ; Magnesium ; Nutrient solution ; Phosphorus ; Potassium ; Triticale ; Rye ; Wheat
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Summary The effects of A1 on the growth and mineral composition of different cultivars of triticale (X Triticosecale, Wittmack), wheat (Triticum aestivum L.) and rye (Secale cereale L.) growing in 1/5 strength Steinberg solutions containing 0 or 6 ppm A1 were evaluated after 32 days. Aluminum increased the concentrations of P and K in the roots and K in the tops of most of the cultivars tested. A1 tolerant triticale retained a lower concentration of Mg in the roots and tops than the A1 sensitive triticale, when subjected to A1 stress. In addition, A1 treatments resulted in smaller increases in root P for the A1 tolerant triticale than for the A1 sensitive cultivars. The concentration of root Ca and P of the A1 tolerant wheat cultivars were significantly below that of the more sensitive plants. Aluminum tolerance in rye appeared to be associated with lower Ca and higher Mg concentrations in the tops. The accumulation of P and A1 in the roots was characteristic of sensitivity in triticale, wheat and rye.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02211704
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