Magnesium sulphate (fertilizer): the instructions for use, price


2018-03-24 23:56:13




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For a quick and proper development of vegetable and garden plants need various types of micro - and macronutrients. In addition to the nitrogen, phosphorus and potassium, plants need to obtain from the soil, and magnesium. To achieve good yields without the use of supplements containing this substance, is impossible. Often it is a lack of soil kompensiruet by making such fertilizers, as magnesium sulfate (MgSO4).

Role in the formation of plants

With a lack of magnesium in the soil from the garden, and garden and agricultural crops is slowing down the formation of chlorophyll. That is, without this macronutrient in plant tissues simply stop the process of photosynthesis. In addition, magnesium:

  • Stimulates the absorption of phosphorus by plants;
  • Activates in tissue cultures of more than 300 enzymes.

When a sufficient amount of magnesium in the soil plants are much faster to accumulate the necessary proteins. Consequently, they begin to actively divide the cells. Also, this macronutrient stimulates the formation in tissue cultures of pectin substances and improves the taste quality of the fruit.

magnesium sulphate

What is a MgSO4

To Replenish stocks of this substance in soil with application of different fertilizers (amoscanate, vermiculite, dunite flour, etc.). However, the most common feeding in this group is magnesium sulfate, the price of which is very low. Is a this substance to pure white, water soluble crystals with a specific taste. Different magnesium sulphate is also called bitter salt. In addition to agriculture, it is used in medicine, food processing and heavy industry.


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It Turns out the magnesium sulfate in the interaction of the following substances:

  • Sulphuric acid
  • Oxide, carbonate and magnesium hydroxide.

Sometimes it is isolated also from sea water or from minerals kieserite or epsomite.

magnesium sulphate price

Use as fertilizer

Magnesium Sulfate – a fast-acting fertilizer, and therefore mainly used in intensive agriculture in the cultivation of grain and other major agricultural crops. In most cases it is recommended to use in neutral and slightly acidic soils. On such soils plants often lack magnesium.

In Addition, MgSO4 is used:

  • In greenhouses;
  • Vegetable open ground;
  • Intensive meadows.

To Apply this fertilizer as it is possible for root and for foliar application.

magnesium sulfate use

Using for vegetable crops

In the gardens and In the gardens as top dressing is typically used magnesium sulphate 7-aqueous (MgSO4 x 7H2O). Most acutely the lack of this macronutrient react horticultural plants such as potatoes, cucumbers and tomatoes. For fertilizing vegetable crops, this fertilizer is best used in the spring simultaneously with nitrogen and phosphorus means. When preparing the soil in April should be:

  • In the seedlings of tomatoes and cucumbers 7 - 10 g/m2 fertilizers;
  • In other cultures - 12-15 g/m2.

Magnesium Sulfate for geraniums, marigolds, daisies and other ornamental herbaceous garden plants are used in the same amount as for a vegetable.

The lack of this microelement in the soil fertilizing should be done during the whole season. Typically, the soil under the plants fertilize MgSO4 x 7H2O once in three weeks. For root feeding magnesium sulfate is diluted at the rate of 25 g per 10 liters of water, a sheet – 15 g per 10 L. the Flow rate of the solution for vegetable and flower crops needs to be about 1-1.5 liters per square meter.

Application for garden shrubs

Raspberries, currants, gooseberries, spray roses, mock orange, lilac, etc. magnesium sulphate is also the first time it is advisable to make in the spring. At the same time on one square meter of a circle of tree trunks is to use about 30 g of product. During the season for shrubs is usually conducted foliar application. Spray the plants with a solution of 15 g of magnesium sulfate and 10 liters of water. Consumption of resources should be limited to 1.5-2 l/m2.

magnesium sulfate fertilizer

Magnesium sulfate: application for fruit trees

Apples, plums, pears and apricots magnesium sulfate fertilize in April in the amount of 30-35 g per square meter of tree trunks circle. During the season of low fruit trees, and shrubs, fertilize by spraying the crown. Old Apple and pear trees easier, of course, fertilize the roots. In the first case, supplements are made the rate of 2-3 liters per tree, in the second – 5-10 L. the solution is prepared in a proportion of 15-25 g of product per 10 liters of water.

Support feeding

The more friable the soil on the site and lower the pH, the less magnesium it contains. Thus, is poor in this microelement is primarily sandy and loamy sod-podzolic soil. The owners of a parcel of such land, be sure to use magnesium sulphate and autumn – as supplementary feeding. This time of year the fertilizer is placed under the digging of the rate of 50-100 g per square meter.

 magnesium sulfate for pelargonium

In order to see exactly what quantity of magnesium sulphate required for this particular site, you can order in a specialized laboratory study of the soil composition.

How to define a lack of magnesium in the soil

Laboratory tests help pinpoint the right amount of fertilizer, including such as magnesium sulfate. However, they are nowadays expensive. Therefore, many gardeners prefer to define lack of certain substances in the soil as crops themselves.

The Lack of magnesium when growing vegetable and garden plants is primarily manifested in a negative state changes of the leaf blades. To introduce MgSO4 into the soil is required if:

  • Fabric on the edges and near the veins of the leaves of the crops purchased yellow, red or purple color;
  • Plate much marinade and become domed due to bending the ends upward.

Very often it happens that some of the leaves on the plants due to the lack of MgSO4 even does die. To show signs of magnesium starvation from vegetable and horticultural crops always start from the bottom. The upper leaves change color last. The cabbage shortage of magnesium causes marbling of fabrics.

In Addition to the negative changes in the condition of the leaves, the lack of this substance in the soil can lead to poor fruit development and, consequently, to lower yields.

magnesium sulfate water 7

How much magnesium sulfate

Widespread this dressing was not only due to the efficiency and speed of action. Very low cost also explains the popularity of such fertilizers as sulphate of magnesium. The price of the option MgSO4 x 7H2O is in the range of only 100-120 RUB. for standard package (1 kg). Ordinary magnesium sulfate is 40-50 rubles/kg depending on the manufacturer and the supplier.

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Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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