Application of Mo fertilizer in soybean
October 18 10:05:46, 2018
Molybdenum is an indispensable trace element in soybeans. Molybdenum promotes metabolism, promotes soybean production, increases chlorophyll content, and enhances photosynthesis. The current molybdenum fertilizer is ammonium molybdate, containing 54.3% of molybdenum. The use of fertilizer, seed fertilizer and top dressing. The seed dressing is weighed in 5 grams of ammonium molybdate, completely dissolved in warm water, and then water is added to 0.5 kg, which is a 1% solution of ammonium molybdate. Seed dressing method: The seed is leveled and the fertilizer solution is evenly sprayed on the seed, and sprayed while stirring to fully adhere the fertilizer solution to the seed coat. Pay attention to the amount of fertilizer solution should not be too much, so as to avoid wrinkling seeds to reduce the quality of seeds, affecting the seed germination rate. The seeds after seed dressing must be dried and not dried. If pesticides are to be mixed, they must be dried after the seeds have dried. Do not use iron during seed dressing to prevent precipitation of molybdenum and failure. Enamel or glaze ceramicware can be used to make the solution. 0.5 kg of fertilizer can mix 15 kg of soybean seeds. Ammonium molybdate fertilizer for seed fertilizer, 10 grams per acre. Due to the inconvenience of using less amount, ammonium molybdate can be first ground into fine water and dissolved in water, and then mixed with chemical fertilizer or organic fertilizer. Foliage top dressing is generally carried out at the flowering stage and the pod stage of soybean. For example, the first flowering period is suitable for spraying once; the first flowering period is the first time, and the second flowering period is the final flowering period to the initial flooding period when spraying twice. The main fertilizers are ammonium molybdate, urea and potassium dihydrogen phosphate. The best condition to spray 3 times, each time about 10 days. Spraying time is best on sunny or cloudy days and half cloudy afternoon. The best spraying speed is 2-3m/s. There should be no rain within 6 hours after spraying. It requires good atomization, even spraying, no heavy leakage, and proper fog angle. Pay attention to the requirements of fertilizer solution before adding sprayer, strict filtration, to prevent impurities from clogging the nozzle, affecting the atomization and spraying effect. The amount of ammonium per acre molybdate 10 grams, urea 300 grams, 150 grams of potassium dihydrogen phosphate. Molybdenum and phosphorus have mutual promoting effects. Phosphorus can enhance the effect of molybdenum fertilizer. Molybdenum fertilizer can be used in combination with phosphate fertilizer. In addition, sulfur can inhibit the absorption of molybdenum by crops. Excessive amounts of sulphur-containing soil or sulphur fertilizers can reduce the effect of molybdenum fertilizer. Applying molybdenum fertilizer in soil, the fertilizer effect can last for 2-4 years without having to apply it every year. Mo fertilizer has significant fertilizer effect on leguminous crops and cruciferous crops.