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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 seeding, use 2 g of ammonium molybdate per kg of beans, first dissolve it in 5 times of hot water, stir well, and mix with water after cooling. For foliar spray application, spray 0.05% to 0.1% ammonium molybdate solution at the initial flowering stage, generally 30 to 50 kg per mu.
Molybdenum is not easily leached and lost in the soil. In the soil where molybdenum is excessively applied or molybdenum is often applied, molybdenum accumulation is likely to occur, and a long time will cause molybdenum poisoning in soybean plants. Therefore, the application of molybdenum should not be excessive, and it should not be applied in the same field for years.
Molybdenum is a trace element, and soybeans require 100 times more molybdenum than other crops. Molybdenum can promote the formation and growth of soybean nodules, increase the number of nodules, increase the volume of nodules, and improve nitrogen fixation capacity, which in turn increases the chlorophyll content and photosynthetic capacity of soybean leaves. Molybdenum also promotes the growth of soybean roots and enhances its ability to absorb nutrients and drought resistance. Therefore, molybdenum has obvious promoting effects on soybean growth and development, pod growth and grain weight increase.
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