The efficacy and role of molybdenum fertilizer? Which crops are sensitive to molybdenum? Molybdenum fertilizer is a fertilizer that plays a key role in crop growth. The scope and methods of application are as follows:
1. Molybdenum fertilizer as base fertilizer
Generally, 0.01-0.1 kg of ammonium molybdate is used per mu, and it is mixed with superphosphate to form molybdenum superphosphate. It can also be mixed with potassium fertilizer and boron fertilizer, and the effect can be achieved.
2. Molybdenum fertilizer for seed fertilizer
Because fertilizer is expensive, it is the most common method used as a fertilizer. Practice has proved that molybdenum fertilizer is a kind of labor saving, fertilizer saving, convenient operation and good effect, which is worthy of promotion. Seeds are mixed with seeds and soaked.
Seed dressing: 1 g of ammonium molybdate per 0.5 kg seed. When seeding, first dissolve the molybdenum fertilizer with a small amount of hot water (50 ° C), then dilute with cold water to the required volume (50 g water by 0.5 kg seed) To calculate), stir the seeds while spraying. When mixing, do not break the seed coat to avoid affecting the germination, but be sure to mix evenly. After mixing, spread it out and dry it. If the seeds are to be treated with pesticides, they can be mixed with the seeds after they have been dried, or they can be mixed together during the dressing.
Soaking seeds: use 0.05%~0.1% ammonium molybdate solution (ie 50kg water plus molybdenum fertilizer 25~50g), soybean, peanut and other legume seeds are generally soaked for 6~12 hours, corn and other grass crops can be soaked 20 Hours or so. Soak after drying and soak. When sowing, the sensation is better, otherwise it will affect the germination.
3. Foliar spraying
The general spray is 0.05%~0.1% concentration, the dosage can be determined according to the size of the plant. Generally, the liquid is 50~75 kg per mu, and it is better to spray 2~3 times in the seedling stage or the flowering stage, 7~10 apart. day. Soybean is a crop that requires more molybdenum. It is a critical period for molybdenum during flowering and podding, and the effect of foliar spraying on soybeans is obvious.
4. Combined application of molybdenum fertilizer and phosphate fertilizer
Molybdenum and phosphorus promote each other and enhance the effect of fertilizer. It is better to use molybdenum fertilizer and phosphate fertilizer together with nitrogen fertilizer. For example, 15 grams of ammonium molybdate, 0.5 kilograms of urea, and 1 kilogram of superphosphate are used per acre. The method comprises the steps of: stirring the superphosphate with water of 75 kg for overnight, and filtering the sediment to add molybdenum fertilizer and urea on the next day to carry out spray application.
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