Magnesium Nutrient Info
Magnesium - Quick Facts
- Magnesium is the central atom of the chlorophyll molecule and is essential for photosynthesis and cell respiration.
- Magnesium is a mobile nutrient, and it is easily translocated from older tissue to the growing parts of the plants.
- Magnesium plays a key role in N, P, carbohydrate, oil & energy reactions in the plant.
- Magnesium is a component of pectin, important for stability of cells and phytin.
- Form used by plants: Mg+2
Magnesium - Role of Nutrient
- An activator of more enzymes than any other nutrient, and plays key role in chlorophyll production.
- Improves utilization and mobility of phosphorus and influences earliness and uniformity of maturity.
- Essential for synthesis and the transport and storage of important plant substances such as carbohydrates, proteins and fats.
- Involved in carbohydrate production and transportation.
- Involved in energy transfer and protein synthesis.
Magnesium - Nutrient in Soil
- Magnesium is present in some soils as magnesites and dolomites.
Magnesium - Deficiency Symptons
- Starts with interveinal chlorosis of older leaves
- Necrosis and red discoloration of stems occur during prolonged periods of deficiency
- Inadequate Mg will accentuate Phosphate deficiency
- Leaf curling upwards along margins
- Dropping foliage
- Reduced root growth
- Related to an imbalance of water, the entire plant looks wilted
Magnesium - Factors Affecting Deficiency
- At pH values >6, magnesium is largely insoluble and therefore unavailable.
- Soils that are acidic and/or high in organic matter, highly leached soils with low CEC and calcareous soils and typically affected by Magnesium deficiency.
- Excess levels of other cations such as K, Ca, and N can further restrict Mg availability.
- Higher amounts of exchangeable Mg than Ca will limit Ca availability.
- Low soil pH negatively affects the uptake of Mg by the plant.
- The uptake of Mg by the plant is negatively affected by large K, Mg and Ca, Mg ratios. This means that even at high magnesium concentrations in the soil a latent or even severe deficiency of magnesium in plants is possible.
Magnesium - Deficiency Photos
R3 Agronomic Platform
Roots – The vegetative stage looks to develop vigorous, healthy roots to maximize nutrient acquisition from the soil. The end result is a healthy root rhizosphere.
Reproduce – Supply the essential nutrients at reproduction to help the plant maximize pollen viability, flowering, pollination, seed set and fruit development.
Ripen – Late season nutrition is vital to optimize the nutrient density and quality of the crop.