| 摘要 |
<p>The magnesium concentrates are described, which are mostly utilisable in connection with nutrition and protection of plants, which may serve also as a source of others basic, secondary or microelement plant nutrients. The concentrates contain at least one of alkaline magnesium carbonate characterised by the total formula Mgx(OH)2(CO3)y . n H2O, where the coefficient x is from interval 2 to 6 and the coefficient y is from interval 1 to 5. To prepare alkaline magnesium carbonates, there are used precipitating chemical reactions of magnesium nitrate and/or magnesium sulphate and/or magnesium chloride with at least one of the alkaline hydroxides and/or with calcium hydroxide. The magnesium concentrates may be in a form of suspension or a paste freely diluting in water or in a form of powdered concentrate dispersable in water to application type of suspension.</p> |
