Molybdenum Nutrient Info
Molybdenum - Quick Facts
- Molybdenum is essential for the process of symbiotic nitrogen (N) fixation by Rhizobia bacteria in legume crops.
- Molybdenum is needed by the plant in the synthesis and activation of nitrate reductase enzyme which reduces nitrate to ammonium in the plant.
- Several materials supply Mo and can be mixed with NPK fertilizers applied as foliar sprays or used as a seed treatment.
- Form used by plants: MoO4-2
Molybdenum - Role of Nutrient
- Optimizes plant growth
- Aids in the formation of legume nodules
- Converts nitrates (NO3) into amino acids and proteins within the plant.
- Involved in synthesis of ABA
Molybdenum - Nutrient in Soil
Molybdenum - Deficiency Symptons
- The first symptoms of Mo deficiency is shown as a N deficiency, (yellow, yellow-green or orange mottling of leaves followed by curling of leaf margins) because Mo is required for N fixation by leguminous plants.
- Appears in older leaves first, and then in younger leaves until the growing point dies.
- Flowers wither or are surpressed, tissue has an abnormally low content of protein, total soluble nitrogen and chlorophyll.
- Leaf blades distorted on cole crops (whiptail)
Molybdenum - Factors Affecting Deficiency
- Soils below pH of 5.5 and low in Phosphorus will affect availability.
- Application of nutrients containing sulphates and ammonium N can negatively impact Mo availability.
- Increase in P will increase Mo. Availability of Mo increases with soil pH.
- Soils derived from sands tend to be low in Mo.
Molybdenum - 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.