Crops rely on magnesium to help them harness the power of sunlight for photosynthesis and growth. In addition, it is essential in turning chlorophyll into energy and activates enzymes involved with respiration, sugar production, and fats. In short - plants require magnesium as much as humans need oxygen!
The Importance of Magnesium to Plant Growth
Chlorophyll, a light-absorbing pigment inside plant cells, is responsible for the vibrant green colouration of plants. The green colour of plants is due to chlorophyll, which takes in fuel from blue and red light waves while reflecting green light waves. Chlorophyll's primary role is to absorb sunlight for photosynthesis, and magnesium is a key component of chlorophyll.
Thanks to photosynthesis, Earth is teeming with life. This process, which uses sunlight to create oxygen and power in the form of sugar or glucose, is essential for developing plants, algae, and even certain kinds of bacteria.
The process of photosynthesis involves the plant taking in carbon dioxide and water from the environment. Water (H20) is oxidized (loses an electron) in plant cells, becoming oxygen (O2) and being expelled back into the atmosphere. Plant cells store energy in the form of glucose produced from the CO2 plants breathe.
While photosynthesis is undoubtedly one of magnesium's most important roles, the mineral is also required for the following:
● Reproduction of Cells
● Creating Proteins
● the process of respiration in plants
● The physiology of phosphate
● The Metabolism of Nitrogen
● Synthesis of proteins
● Absorption of water
Why Does it Matter to Assess the Soil's Magnesium Levels?
Mg is more mobile in soils than other cations such as K, Ca, and NH4. Therefore, magnesium deficiency is a problem in soils used for intensive crop production systems, particularly since its relevance in soil and, by extension, crop productivity has been underestimated, and Mg has been disregarded in fertilization procedures.
Magnesium Deficiency
Magnesium shortage may harm plant health since it prevents plants from using the sun's energy for growth and development.
Symptoms include early leaf drop and a yellowing (occasionally with reddish brown overtones) in the spaces between the leaf's veins. Tomatoes, apples, grapevines, raspberries, roses, and rhododendrons often suffer from magnesium shortage.
Chlorosis (yellowing of the leaves) is the most noticeable sign since Magnesium is an integral part of chlorophyll. Or, more precisely, leaf yellowing, known as interveinal chlorosis, in which the veins stay green. Although a lack of several nutrients may cause leaf yellowing, a magnesium shortage can be identified by the presence of interveinal chlorosis.
Older, lower leaves show magnesium shortage symptoms first since Magnesium migrates upwards to nourish new development. Chlorosis may spread to newer leaves as the shortage worsens. Some plants may have red, purple, or brown hues when chlorophyll levels decline over time. Interveinal chlorosis causes sluggish plant development, poor crop output, and, at its worst, necrosis (the loss of leaf tissue).
Reason Magnesium is essential for plant growth and photosynthesis (photosynthesis). Magnesium deficiency often occurs in low-density, sandy soils. In addition, magnesium insufficiency may result from the overuse of high-potassium fertilizers (such as tomato feed) since plants prefer to take up potassium.
High rainfall and light, sandy, acidic soils facilitate magnesium leaching. In situations of over-application of fertilizer like potash (potassium), the plants will take up potassium instead of Magnesium, resulting in a possible deficit in Magnesium.
Reasons why you could be low on Magnesium:
● Frequent, heavy rain
● Gradients of coarse and fine sand
● Soil with a low pH value, Magnesium is less soluble in low-pH soils and so less readily accessible.
● Fertile ground with a high potassium content
● A lack of or insufficient fertilization
● Climates that are cold and wet
● A nutrient-rich soil with a high EC
Remedies Epsom salts may be used as foliar feed throughout the summer as a short-term solution. To make a bath salts solution, mix 20 grams of Epsom salts with 1 litre of water (about 1/3 of an ounce) and a few drops of liquid detergent. Spray twice or thrice every two weeks under cloudy conditions to prevent leaf scorch.
Dolomite limestone (calcium-magnesium carbonate) or Epsom salts (magnesium sulfate) at a rate of 100g per square meter should be applied to the soil surrounding the roots over the long term. The soil pH will increase after adding dolomite limestone. Hence it is not recommended for usage near ericaceous (acid-loving) plants like rhododendrons or camellias or in areas where the soil is already alkaline.
Magnesium in water may be a source worth investigating before settling on a fertilizer. Magnesium is essential for plant growth, and if your water supply doesn't include at least 25 ppm, you'll need to supplement it with fertilizer. By reading the labels, see whether the fertilizers you presently use include magnesium. Epsom salts, or magnesium sulfate heptahydrate, may be used as a supplement if necessary (MgSO4.7H2O). However, the pH of the growth media might gradually increase if you use a cal-mag (calcium-magnesium) fertilizer instead of Epsom salts since these fertilizers tend to be basic.
Can a Magnesium Shortage be Helped by Using Epsom Salts?
Magnesium deficiency, fortunately, may be easily and cheaply remedied. For quick relief, try using Epsom salts. Make an Epsom salt solution of 2% and sprinkle it on the plant's foliage every four to five days for approximately a week. Salts are easier to dissolve in hot water, although the solution may be applied at room temperature if desired. Before the day becomes too hot when the leaf's pores shut to retain moisture, spray them with a foliar feed.
It's preferable to avoid nutrient deficiencies rather than try to fix them, so consider applying a layer of rich organic compost to your plants each year. This is a straightforward and efficient strategy for providing a steady supply of magnesium to your plants throughout the year.
Conclusion
Magnesium plays a significant role in aiding plants to flourish. Its involvement helps with photosynthesis, transporting carbohydrates needed for various plant tissues and enhancing its ability to tolerate stressful environments. Especially when crops are grown intensively, or soils have high acidity levels or large particles of sand, adequate amounts of Mg must be provided - otherwise, reduced harvests may result!
