Calcium and potassium uptake from clay by fruit tree roots
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چکیده
منابع مشابه
Modelling potassium uptake by wheat
A model has been used to simulate potassium (K) uptake by wheat in a pot culture experiment. Three soils from India, namely Alfisol, Inceptisol and Vertisol, were differentially K exhausted by Sudan grass (Surghum vulgare var. Sudanensis) for a period of 280 days and were used to simulate potassium uptake by wheat (Triticum aestivum) and also to predict the amounts of K released or fixed during...
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Apples and other fruits are frequently cultivated in gardens and are part of our daily diet. Uptake of pollutants into apples may therefore contribute to the human daily intake of toxic substances. In current risk assessment of polluted soils, regressions or models are in use, which were not intended to be used for tree fruits. A simple model for uptake of neutral organic contaminants into frui...
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Concentrations of KC1 and NaCl below 1.0 M increased Ca uptake (in the presence of oxalate) by dog cardiac microsomes purified on sucrose density gradients; higher concentrations of these salts decreased Ca uptake. At lower microsome concentrations, where calcium uptake was maximal, replacement of KC1 by equimolar amounts of NaCl decreased both the rate and extent of Ca uptake. The uptake of Ca...
متن کاملCalcium inhibition of potassium absorption in corn roots.
Calcium (or magnesium) sulfate or chloride was found to inhibit energy dependent potassium transport in excised corn roots. This Ca(2+) inhibition of K(+) transport was most pronounced during the initial phases of transport. As the absorption periods were lengthened the effect of Ca(2+) gradually changed from an inhibition to a typical promotion (after about 30-45 mins) of K(+) transport. Kinet...
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ژورنال
عنوان ژورنال: Soil Science and Plant Nutrition
سال: 1966
ISSN: 0038-0768,1747-0765
DOI: 10.1080/00380768.1966.10431184