Foliar metal ion nutrient fertilizer

摘要

The uptake of foliar-applied metal ion nutrients, for example, zinc, iron, magnesium and copper, is influenced by humidity. Specifically, uptake is negatively impacted if the zinc is applied under low humidity, as the metal ion is “locked up” by leaf waxes as the droplet dries on the surface of the leaf, thereby rendering the metal ion useless. Described herein is a foliar metal ion fertilizer comprising (a) a metal ion sulphate in combination with a mixture of (b) urea and (c) a substance with a suitable point of deliquescence (POD) such as organic surfactants, calcium chloride, magnesium chloride or combinations thereof.

主权项

1. A foliar metal ion nutrient fertilizer, comprising:
from about 73% to about 99.6% (v/v) of a metal ion sulphate nutrient wherein the metal ion is selected from the group consisting of zinc, iron, copper and magnesium; from about 0.25% to about 25% (v/v) of urea transport enhancer; and from about 0.1% to about 2.5% (v/v) of a POD adjuster selected from the group consisting of organic surfactants, calcium chloride and magnesium chloride.