Soil-improvement special slow release fertilizer for rice, and preparation method thereof

Abstract

The invention discloses a soil-improvement special slow release fertilizer for rice. The soil-improvement special slow release fertilizer for rice comprises 30-45wt% of powdery urea, 20-40wt% of urea phosphate, 8-15wt% of potassium chloride, 15-30wt% of a potash magnesium sulfate fertilizer, 2-8wt% of zinc humate, 1-6wt% of manganese humate, 1-5wt% of urea iron humate, 0.005-0.02wt% of compound sodium nitrophenolate, 1-5wt% of a slow release agent and 1.99-6wt% of an auxiliary material, wherein the slow release agent contains 5-15wt% of N-methylolacrylamide, 10-30wt% of an unsaturated polyester resin, 4-10wt% of cyclohexanol, 5-13wt% of 2-butanol, 1-5wt% of talcum powder, 1-4wt% of kaolin, 1-6wt% of ethyl cellulose, and the balance distilled water. The invention also discloses a preparation method of the soil-improvement special slow release fertilizer for rice.

Description

technical field

[0001] The invention relates to the technical field of agricultural fertilizers, in particular to a special slow-release fertilizer for soil improvement type rice and a preparation method thereof. Background technique

[0002] The planting area of ​​food crops and economic crops in my country has been maintained at more than 1.5 billion mu all year round, but the soil fertility level of my country's cultivated land is generally low, and the phenomena of soil acidification and salinization are very prominent. According to statistics, the salinity and alkalinity of my country's northwest, northeast and coastal areas The total area of ​​wasteland and saline-alkali-damaged cultivated land exceeds 500 million mu, of which nearly 200 million mu has potential for agricultural use; my country's soil acidification is also very serious, and the soil pH value of about 226 million mu of cultivated land in the country is below 5.5. Soil acidification is intensified, and the...

Examples

Embodiment 1

[0037] A special slow-release fertilizer for soil improvement rice, containing the following components by weight percentage: 30% powdered urea, 21% urea phosphate, 10% potassium chloride, 18% potassium magnesium sulfate fertilizer, 7% zinc humate, humic acid Manganese acid 1%, humic acid urea iron 4%, sodium nitrophenolate 0.013%, slow release agent 5%, modified cassava flour 3.987%;

[0038] Wherein, the slow-release agent contains the following components by weight percentage: N-methylolacrylamide 5%, unsaturated polyester resin 17%, cyclohexanol 10%, 2-butanol 7%, talcum powder 1% , kaolin 4%, ethyl cellulose 6%, and the balance is distilled water.

[0039] Described sustained-release preparation adopts following steps to make:

[0040] S1. Add distilled water to the reactor according to the ratio, heat it to 95°C, then add the ratio of N-methylolacrylamide, adjust the pH value of the solution to 8 with ammonia water, and keep stirring until it is completely dissolved; wa...

Embodiment 2

[0053] A special slow-release fertilizer for soil improvement rice, containing the following components by weight percentage: 30% powdered urea, 22% urea phosphate, 13% potassium chloride, 16% potassium magnesium sulfate fertilizer, 7% zinc humate, humic acid Manganese acid 1%, humic acid urea iron 4%, sodium nitrophenolate 0.018%, sustained release agent 4%, modified cassava flour 2.982%;

[0054] Wherein, the sustained-release agent contains the following components by weight percentage: N-methylolacrylamide 15%, unsaturated polyester resin 10%, cyclohexanol 9%, 2-butanol 13%, talcum powder 1.5% , kaolin 3%, ethyl cellulose 1%, and the balance is distilled water.

[0055] Described sustained-release preparation adopts following steps to make:

[0056] S1. Add distilled water to the reactor according to the ratio, heat to 90°C, then add the ratio of N-methylolacrylamide, adjust the pH value of the solution to 9 with ammonia water, and keep stirring until it is completely dis...

Embodiment 3

[0069] A special slow-release fertilizer for soil improvement rice, containing the following components by weight percentage: powdered urea 33%, urea phosphate 20%, potassium chloride 11.49%, potassium magnesium sulfate fertilizer 20%, zinc humate 6%, humic acid Manganese acid 2%, humic acid urea iron 3%, sodium nitrophenolate 0.02%, sustained release agent 2.5%, modified cassava flour 1.99%;

[0070] Wherein, the sustained-release agent contains the following components by weight percentage: N-methylolacrylamide 12%, unsaturated polyester resin 30%, cyclohexanol 4%, 2-butanol 5%, talcum powder 3% , kaolin 1%, ethyl cellulose 5%, and the balance is distilled water.

[0071] Described sustained-release preparation adopts following steps to make:

[0072] S1. Add distilled water to the reactor according to the ratio, heat to 92°C, then add the ratio of N-methylolacrylamide, adjust the pH value of the solution to 8.1 with ammonia water, and keep stirring until it is completely d...

technical field

[0001] The invention relates to the technical field of agricultural fertilizers, in particular to a special slow-release fertilizer for soil improvement type rice and a preparation method thereof. Background technique

[0002] The planting area of ​​food crops and economic crops in my country has been maintained at more than 1.5 billion mu all year round, but the soil fertility level of my country's cultivated land is generally low, and the phenomena of soil acidification and salinization are very prominent. According to statistics, the salinity and alkalinity of my country's northwest, northeast and coastal areas The total area of ​​wasteland and saline-alkali-damaged cultivated land exceeds 500 million mu, of which nearly 200 million mu has potential for agricultural use; my country's soil acidification is also very serious, and the soil pH value of about 226 million mu of cultivated land in the country is below 5.5. Soil acidification is intensified, and the...

Examples

Embodiment 1

[0037] A special slow-release fertilizer for soil improvement rice, containing the following components by weight percentage: 30% powdered urea, 21% urea phosphate, 10% potassium chloride, 18% potassium magnesium sulfate fertilizer, 7% zinc humate, humic acid Manganese acid 1%, humic acid urea iron 4%, sodium nitrophenolate 0.013%, slow release agent 5%, modified cassava flour 3.987%;

[0038] Wherein, the slow-release agent contains the following components by weight percentage: N-methylolacrylamide 5%, unsaturated polyester resin 17%, cyclohexanol 10%, 2-butanol 7%, talcum powder 1% , kaolin 4%, ethyl cellulose 6%, and the balance is distilled water.

[0039] Described sustained-release preparation adopts following steps to make:

[0040] S1. Add distilled water to the reactor according to the ratio, heat it to 95°C, then add the ratio of N-methylolacrylamide, adjust the pH value of the solution to 8 with ammonia water, and keep stirring until it is completely dissolved; wa...

Embodiment 2

[0053] A special slow-release fertilizer for soil improvement rice, containing the following components by weight percentage: 30% powdered urea, 22% urea phosphate, 13% potassium chloride, 16% potassium magnesium sulfate fertilizer, 7% zinc humate, humic acid Manganese acid 1%, humic acid urea iron 4%, sodium nitrophenolate 0.018%, sustained release agent 4%, modified cassava flour 2.982%;

[0054] Wherein, the sustained-release agent contains the following components by weight percentage: N-methylolacrylamide 15%, unsaturated polyester resin 10%, cyclohexanol 9%, 2-butanol 13%, talcum powder 1.5% , kaolin 3%, ethyl cellulose 1%, and the balance is distilled water.

[0055] Described sustained-release preparation adopts following steps to make:

[0056] S1. Add distilled water to the reactor according to the ratio, heat to 90°C, then add the ratio of N-methylolacrylamide, adjust the pH value of the solution to 9 with ammonia water, and keep stirring until it is completely dis...

Embodiment 3

[0069] A special slow-release fertilizer for soil improvement rice, containing the following components by weight percentage: powdered urea 33%, urea phosphate 20%, potassium chloride 11.49%, potassium magnesium sulfate fertilizer 20%, zinc humate 6%, humic acid Manganese acid 2%, humic acid urea iron 3%, sodium nitrophenolate 0.02%, sustained release agent 2.5%, modified cassava flour 1.99%;

[0070] Wherein, the sustained-release agent contains the following components by weight percentage: N-methylolacrylamide 12%, unsaturated polyester resin 30%, cyclohexanol 4%, 2-butanol 5%, talcum powder 3% , kaolin 1%, ethyl cellulose 5%, and the balance is distilled water.

[0071] Described sustained-release preparation adopts following steps to make:

[0072] S1. Add distilled water to the reactor according to the ratio, heat to 92°C, then add the ratio of N-methylolacrylamide, adjust the pH value of the solution to 8.1 with ammonia water, and keep stirring until it is completely d...

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