Special soil conditioner for soda saline-alkaline paddy fields and preparation method thereof

A special soil conditioner for soda saline-alkaline paddy fields, comprising raw material components in parts by weight:

• 560-740 parts of calcium chloride dihydrate, 45-90 parts of anionic polyacrylamide, 45-90 parts of mineral potassium fulvate, 1.8-2.7 parts of diethylaminoethyl (DA) polyamine, DA-7 or DA-8, 0.6-0.9 parts of brassinolide, 0.6-0.8 parts of potassium indolebutyrate, 0.3-0.4 parts of sodium α-naphthylacetate and 5-8 parts of powder anti-caking agent,
• wherein the potassium indolebutyrate and the sodium α-naphthylacetate are compounded in a ratio of 2:1;
• wherein a calcium chloride content in the calcium chloride dihydrate is ≥74 wt %;
• wherein a molecular weight of the anionic polyacrylamide is 6-12 Mg/mol;
• wherein a potassium oxide content is ≥12 wt %, a humic acid content is ≥60 wt % and a fulvic acid content is ≥50 wt % in the mineral potassium fulvate;
• wherein a content of an active ingredient of the DA polyamine or the DA-7 or the DA-8 is ≥98 wt %;
• wherein a content of an active ingredient of the brassinolide is 0.01 wt %, a content of an active ingredient of the potassium indolebutyrate is ≥98 wt %, and a content of an active ingredient of the sodium α-naphthylacetate is ≥98 wt %.