Effect of increasing doses of waste chalk on the zinc content in sod-podzolic light loamy soil and its accumulation by plants. Empirical models of zinc translocation Into plants of the cereal, legume and cabbage families

Under the conditions of a 5-year vegetation-precision experiment based on acidic sod-podzolic sandy loam soil reclaimed with increasing (from 0.8 to 24 t/ha) doses of conversion chalk (CC), the effect of liming on the value of soil acidity (pHKCl), the content of mobile zinc compounds in the soil and its translocation into plants was studied, related to the cabbage, legume and cereal families. It was shown that with an increase in the dose of meliorant, the content of zinc available to plants in the soil decreased, and its transition to plant tissues slowed down. Quantitative parameters of zinc accumulation by spring rape plants were revealed 1 year, 4 and 5 years after liming. A relationship has been established between the zinc content in grain and straw of spring barley. In the range of meliorant doses from 0 to 2.0, calculated by hydrolytic acidity (Ha), barley grain accumulated zinc in sufficient quantities for the normal functioning of barley. The zinc content in vetch tissues, which allows plants to develop normally, varied in liming options from 0.2 to 1.7 Ha. Empirical models have been developed that adequately describe the relationship between: a – the dose of chalk application and the pH value of the soil achieved as a result of liming, b – the pH value of the soil and the zinc content in soil and plants, c – the zinc content in soil and its translocation into plant species of various biological families, d – zinc concentrations in grain and straw of plants.