Production of nitrification inhibitor containing mineral fertilizer comprises applying dilute solution or suspension of pyrazole derivative to heated fertilizer in powder, prill, compacted or granulate form

摘要

Production of nitrification inhibitor-containing mineral fertilizers (A) involves applying a solution or suspension containing up to 20 wt. % of a pyrazole derivative nitrification inhibitor (I) to a mineral fertilizer (II) in powder, prill, compacted or granulate form at 70-130 deg C, in an amount such that (A) contains (I) at 0.001-1.5 wt. % based on the initial weight of (II). Production of nitrification inhibitor-containing mineral fertilizers (A) involves applying a solution or suspension containing up to 20 wt. % of at least one pyrazole derivative nitrification inhibitor of formula (I) (or its salt) to a mineral fertilizer (II) in powder, prill, compacted or granulate form at 70-130 (preferably 87-120) deg C, in an amount such that (A) contains (I) (or its salt) at 0.001-1.5 wt. % based on the initial weight of (II). R1 = halo or 1-4C alkyl; R2 = 1-4C alkyl; and R3 = H or CH2OH.