What to pay attention to when spraying rice foliar fertilizer

Generally speaking, it is most suitable to spray early rice at the stage of big embryo, initial heading, grain filling and full heading, which takes more than an hour per mu. If spraying fertilizer is at the heading and flowering stage, it should be sprayed before flowering in the morning and after 4 p.m. Processing liquid fertilizer all kinds of available nitrogen, phosphorus and potassium fertilizer, potassium dihydrogen phosphate, triacontanol, borax, silkworm manure and human and animal urine can be used as foliar fertilizer, which is not much per mu, but it should be processed into liquid fertilizer first. The day before the quick-acting chemical fertilizer was sprayed, it was dissolved with 5: 10 times water to prevent withered grass leaves from being sprayed. Human and animal urine should first be rotten in the pool, silkworm feces should be dissolved in 10 times water, filtered after 24 hours, and then sprayed on sufficient water; borax is broken first, fully stirred into a thick liquid with a small amount of water, and then sprayed on sufficient water. According to the growth trend of grain seedlings, the fields with green leaves and neat heading were sprayed with phosphorus and potassium mixed fertilizer. 0.25 grams of urea, 0.5 kilograms of superphosphate, 0.25 kilograms of potassium chloride plus 60 kilograms of water per mu, or 2.5 kilograms of cooked bovine urine and 1 kilogram of superphosphate per mu to 60 kilograms of water. The fields with bluish yellow leaves, irregular growth and thin soil are mainly sprayed with nitrogen fertilizer and combined with nitrogen and phosphorus.