Why do soybeans apply molybdenum? How to apply?

A: Molybdenum is a trace element, and soybeans require 100 times more molybdenum than other crops . Molybdenum can promote the formation and growth of soybean root nodule, increased the number of nodules, nodule volume increases, improved nitrogen fixation ability, increasing the chlorophyll content of the feed leaves, enhanced photosynthetic capacity. Molybdenum can also promote the growth of soybean roots, increase the absorption capacity of nutrients, and enhance drought resistance. Therefore, the molybdenum on soybean growth and development, increased pod growth and improve grain kernel weight has a significant role in promoting.

Ammonium molybdate is a commonly used molybdenum fertilizer, which is generally used as a seed fertilizer, and can also be used as a foliar spray fertilizer. For the seed fertilizer, use 2 g of ammonium molybdate per kg of beans . Dissolve it in 5 times of hot water and stir well. Foliar spray fertilizer with 0.05% - 0.1% ammonium molybdate solution, sprayed in the early flowering stage, typically 30-50 kg per acre spray. Molybdenum leaching losses in the soil is not easy, often Shi Shi Mo excess or molybdenum soil, molybdenum prime easily gradually accumulate in the soil, it has accumulated more than a phenomenon will occur in soybean plant molybdenum poisoning. Therefore, the application of molybdenum should not be excessive, and it should not be applied in the same field for years.