Manganese has the power to impact many important processes including stomatal activity, photo assimilate movement, disease resistance and insect infestation, and overall plant growth and yield.
Quick Facts About Manganese
- Manganese plays a vital role in photosynthesis by aiding in the splitting of the water molecule.
- Manganese plays an essential role in enzyme maintenance.
- Manganese influences the uptake and assimilation of other nutrients in the plant.
- Manganese affects energy budget by regulating carbohydrate metabolism.
- Reduction of nitrates in plants is only possible if sufficient Manganese is present.
- Manganese is very immobile in plants, with deficiency symptoms appearing first on younger leaves.
- Manganese can exist as 3 different valencies in the soil (Mn+2, Mn+3 and Mn+4) . The plant available form is Mn+2.
Role of Manganese in Plants
- Regulates the splitting of the water molecules during photosynthesis.
- Accelerates germination and early season seed development.
- Activates several enzymes.
- Increases the availability of Phosphorus and Calcium.
- Aids in chlorophyll synthesis.
- Heightens the concentration of valuable ingredients such as citric acid and vitamin C.
- Similar to Copper and Zinc, Manganese is importance for immobilization of free oxygen radicals.
- Chlorosis on mature foliage followed by chlorosis on young foliage.
- Crops become yellowish to olive green, and foliage appears wilted.
- Interveinal chlorosis developing in leaves.
- Cereals show chlorotic and necrotic strips.
- Acidification of soils with Sulphur can correct Manganese deficiency.
- Limited mobility of Manganese in the plant.
- The deficiency symptoms are especially characteristic in oats which are called: grey speck or early blight; here the plant exhibits dirty grey strips or spots on the base of the leaves.
- The entire water balance is affected that will cause wilting of the plant.
Factors Affecting Deficiencies
- High soil pH (7 .0 or above).
- Soils that are high organic matter, cold wet soils, poorly drained soils, light sandy soils.
- Forms of Nitrogen fertilizer can affect Manganese availability.
- Low levels of Potassium can also interfere with effective uptake of Manganese.
- High soil levels of available Copper (Cu), Iron (Fe), or Zinc(Zn) will reduce Manganese uptake by plants.
- Under waterlogged conditions, Manganese becomes reduced (highly plant available) which can cause a reduction in Copper, Zinc and Iron Uptake.
Manganese Recommended Products
Ruffin-Tuff Crop Mix II
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