| 摘要 |
A method of enhancing the efficacy of a phosphate fertilizer and increasing the availability of other soil nutrients comprises adding to the fertilizer a scale-inhibiting compound.
<??>An improved fertilizing composition comprises a phosphate fertilizer and a scale-inhibiting compound.
<??>Preferred scale-inhibiting compounds are 1-hydroxyalkylidene-1,1-diphosponic acid, copolymers of acrylic acid and 2-acrylamido-2-methylpropyl sulphonic acid (AMPS) or 2-meth-acrylamidomethylpropyl sulphonic acid (MAMPS) in which the monomer ratio is in the range 1:50 to 50:1 by weight, copolymers of methacrylic acid and AMPS or MAMPS in which the monomer ratio is 50:1 to 1:50 by weight, copolymers of acrylic acid and a hydroxyalkyl acrylate, copolymers of methacrylic acid and hydroxy alkylacrylate, copolymers of acrylic acid and maleic acid or maleic anhydrides, copolymers of methacrylic acid and maleic acid or maleic anhydrides, and other polymers prepared from acrylic acid, methacrylic acid, maleic acid or maleic anhydride, and hydroxyalkyl acrylates, alone or in combination. |
