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  • 1
    Electronic Resource
    Electronic Resource
    Growth analysis of soil-grown spinach plants at different N-regimes (1993)
    Springer
    Plant and soil 154 (1993), S. 73-80 
    Details
    ISSN: 1573-5036
    Keywords: exponential nutrient addition ; growth model ; nitrogen productivity ; shoot-root balance ; soil-plant interaction ; spinach
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Spinach plants were grown in pots under controlled conditions in three different soils (a loamy sand, a silt loam at low mineral-N level and a silt loam at the double mineral-N level). The nitrogen uptake pattern varied considerably between the three soil types and was used to validate an equation between the relative growth rate and nitrogen content. This equation is based on the growth response of spinach plants grown hydroponically at equal environmental conditions either at optimum nitrogen supply (complete nutrient solution) or with a relative nitrate addition rate of 0.30 day−1, 0.225 day−1 or 0.15 day−1 effecting an exponential increase in nitrogen uptake. Growth in potted soil was slightly overestimated. Part of this bias was explained by the lower shoot weight ratio observed for the soil grown plants. This was demonstrated by the improvement in growth predictions when using net assimilation rate rather than relative growth rate as the driving variable in the model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00011074
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Analysis of the genotypic variation in radiocaesium uptake from soil (1993)
    Springer
    Plant and soil 155-156 (1993), S. 431-434 
    Details
    ISSN: 1573-5036
    Keywords: cationic interactions ; radiocaesium ; spinach (Spinacia oleracea L., cv. Subito) ; wheat (Triticum aestivum, cv. Tonic)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Young spinach (Spinacia oleracea L., cv. Subito) and wheat (Triticum aestivum, cv. Tonic) plants were hydroponically grown in eight different nutrient solutions containing 137Cs. Ca, Mg, K and NH4 concentrations were varied whilst anion concentrations were equal in all solutions. The large differences in potassium content between spinach and wheat were not reflected in similar differences in 137Cs content at any nutritive treatment. Both crops were also grown in a potted podzolic soil contaminated with radiocaesium. This experiment was conducted in a phytotron at two climatic conditions (‘summer’ and ‘winter’) which differed in day length and light intensity. Wheat plants had higher 137Cs levels than spinach at both conditions. The 137Cs levels furthermore decreased during development. The 137Cs plant/soil solution concentration ratio was lower at the ‘summer’ than at the ‘winter’ conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00025075
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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