Input of Strontium to Rape Plants at the Conversion of Chalk Waste Used for the Reclamation of Acid Soils
In a 5-year-long liming pot experience, the dissolution rate of conversion chalk was studied in a wide range of application rates. It was established that the chalk possessed a high chemical activity, and the full dissolution of the ameliorant added in considerable quantities was reached 3-4 years after its application. It was revealed that an increase in the concentration of plant-available strontium in the soil of pots lasted during all 5 years of the experiment. It was shown that the application rate of chalk was of crucial importance for the input of Sr to plants. Differences in the accumulation of strontium by rape in the year of chalk application and in the third-fourth year of its aftereffect were revealed. Factors of Sr accumulation by rape for all years of the experience were presented. The Ca/Sr ratios in plant tissues were calculated.