The Meaning of Slow-acting Fertilizers

Slow-acting fertilizers are also called long-acting fertilizers and slow-release fertilizers. The compounds or physical state of these fertilizers can be slowly released over a period of time for continuous absorption and utilization by plants, that is, when these nutrients are applied to the soil, it is difficult to be dissolved, it can be dissolved after a short period of time to be dissolved. But the fertilizer effect is long-lasting. The release of nutrients in the fertilizer is completely determined by natural factors, such as calcium magnesium phosphate fertilizer, phosphate rock powder, dicalcium phosphate, defluorinated phosphate fertilizer, magnesium ammonium phosphate, calcium metaphosphate, etc. Some organic compounds are urea formaldehyde, butenylene diurea, isobutylene diurea, oxalic acid amide, melamine, etc., and some Additives (such as nitrification inhibitors, urease inhibition, etc.) or coated fertilizers, the former such as long-acting urea, and the latter such as sulfur-containing urea are listed as slow-acting fertilizers, of which long-acting ammonium bicarbonate is in the ammonium bicarbonate production system. Adding ammonia stabilizer, the fertilizer efficiency period is extended from 30-45 days to 90-110 days, and the nitrogen utilization rate is increased by 25% to 35%. Slow-acting fertilizers are often used as base fertilizers.