Seed-covering agent and seed covered with seed-covering agent

摘要

A seed-covering agent, which covers a seed surface and contains an iron powder and a binder, is specified such that, in the above-described iron powder, the mass ratio of an iron powder having a particle size of 63 μm or less to a total mass of the iron powder is 0% or more and 75% or less, the mass ratio of an iron powder having a particle size of more than 63 μm and 150 μm or less to the total mass of the iron powder is 25% or more and 100% or less, and the mass ratio of an iron powder having a particle size of more than 150 μm to a total mass of the iron powder is 0% or more and 50% or less, and the average particle size of the above-described binder is 1 to 150 μm.

主权项

1. A seed covered with a seed-covering agent including an iron powder component, the seed-covering agent comprising;
a first cover layer containing fine iron particles having an average particle size from 1 μm to 40 μm in the iron powder component and a binder, and a second cover layer, located above the first cover layer, containing coarse iron particles having an average particle size from 63 μm 150 μm in the iron powder component and a binder; and wherein, in the iron powder component, (i) a mass ratio of the iron particles having a particle size of not more than 63 μm to a total mass of the iron powder component is 8% to 75% and (ii) a mass ratio of the iron particles having a particle size of more than 63 μm and not more than 150 μm to the total mass of the iron powder component is 25% to 91.5%.