Magnetic organic fertilizer containing sodium alginate and with excellent moisture-preservation and fertilizer-conservation performance and preparation method thereof
A technology of sodium alginate, water and fertilizer retention, applied in the agricultural field, can solve problems such as single function, and achieve the effects of improving quality, excellent water and fertilizer retention, and improving agronomic traits
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[0017] The magnetic organic fertilizer containing sodium alginate, which is excellent in water and fertilizer retention of the present embodiment, is prepared by the following steps:
[0018] (1) Add hydroxylamine hydrochloride to isopropanol, mix and stir evenly to obtain hydroxylamine hydrochloride-isopropanol solution; add sodium hydroxide to isopropanol, mix and stir evenly to obtain sodium hydroxide-isopropanol solution ; Under stirring conditions, the sodium hydroxide-isopropanol solution is added dropwise to the hydroxylamine hydrochloride-isopropanol solution until the pH of the system is neutral to obtain a mixed solution for subsequent use;
[0019] (2) Add sodium alginate and sodium hydroxide to isopropanol, add ethyl chloroacetate, stir at room temperature for 1.5h, then raise the temperature to 80°C, stir with constant temperature magnetic force for 6h, lower the temperature to 35°C, and add step by drop (1) The resulting mixture was magnetically stirred at room t...
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