Ammonium molybdate is a commonly used molybdenum fertilizer, generally for basal fertilizer, soaking, seed dressing and foliar spray. Molybdenum seed soaking, seed dressing and foliar spray all have significant effect on yield increase, and seed dressing performance is the best.
base fertilizer. Ammonium molybdate 10 to 28 grams per acre is added to dissolve in water, mixed with phosphate fertilizer and potash fertilizer, or mixed in a farmyard manure or in a hole.
Seed dressing. Ammonium molybdate ammonium per gram of soybean seed 1 ~ 2 grams, generally the first amount of warm water will be dissolved in ammonium molybdate, add cold water dilution, the total amount of water and the amount of seed is equal to all wet seed is appropriate, until all the seeds Dry after sowing.
Soaking. The solution was soaked in 0.05% ammonium molybdate solution for 12-20 hours, air-dried and sowed.
Foliar spraying fertilizer. Spraying a concentration of 0.05% ~ 0.1% ammonium molybdate solution, respectively, in soybean branching, flowering, drum grain period, and then spray 30 to 40 kilograms acres. When spraying, both sides of the blade should be sprayed to enlarge the absorption surface, enhance absorption and improve fertilizer efficiency.
Some considerations when applying molybdenum fertilizer:
When dressing or soaking seeds, metal utensils such as iron and aluminum cannot be used to prevent the precipitation of molybdenum fertilizer. It is best to perform it on plastic film or porcelain pots.
The seeds that are seeded or impregnated with molybdenum fertilizer have certain toxicity, and humans and animals are not edible. It is better to sow and mix them in order to avoid waste.
Foliar spray should be selected after 4 o'clock in the afternoon or after 9 o'clock in the morning. It is better not to spray on stormy days or at noon in order to enhance the spraying effect.
Phosphorus is very important for the growth and development of soybean nodules and nitrogen fixation. Phosphorus not only promotes root growth, but also contributes to the development of root nodules and enhances the nitrogen fixation capacity of root nodules. Therefore, in the leguminous crops, we must pay attention to the application of phosphate fertilizer, through the application of phosphorus fertilizer to promote nitrogen fixation, can achieve "nitrogen phosphorus" effect. The molybdenum fertilizer can be sprayed with the phosphate fertilizer in production, and the effect is very good. The method is: 30 grams of ammonium phosphate is added to the ammonium molybdate solution sprayed per acre, and the mixture can be used after mixing, or the molybdenum fertilizer and potassium dihydrogen phosphate are sprayed together, generally in a solution of 50 kg of ammonium molybdate, Potassium dihydrogen phosphate 100-150 g can be added.
Although molybdenum fertilizer is important, it is a trace element, and molybdenum is not easily lost in the soil. Molybdenum is likely to be accumulated in the soil with excessive molybdenum molybdenum or molybdenum, and molybdenum poisoning occurs in soybean plants for a long time. Therefore, molybdenum should not be used excessively, nor should it be applied in the same field year after year.
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