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Rice slow-release fertilizer and preparation and application methods thereof

A technology of slow-release fertilizer and rice, which is applied in the field of rice slow-release fertilizer and its preparation and application, and can solve the problems of no layering effect and waste of fertilizer

Pending Publication Date: 2020-12-11
熊忠伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the active ingredients of the slow-release fertilizer are basically in the coating, which does not have a good layering effect. Due to the difference in the type and demand of fertilizers in different growth stages of rice, the slow-release fertilizer only has Layers of fertilizer, releasing the same fertilizer throughout the growth cycle, is undoubtedly another waste of fertilizer

Method used

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  • Rice slow-release fertilizer and preparation and application methods thereof
  • Rice slow-release fertilizer and preparation and application methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0062] Table 1 shows the raw material components and parts by weight in Examples 1-3 of a slow-release fertilizer for rice.

[0063] Table 1 The ingredients and parts by weight of each raw material in Examples 1-3 of a slow-release fertilizer for rice

[0064]

[0065] Note: "-" in the table means not added.

[0066] In Example 1 of a slow-release fertilizer for rice, the slow-release fertilizer for rice is spherical particles, which are sequentially from inside to outside: nutrient core, inner coating, fertilizer layer and outer coating; the average particle diameter of the nutrient core is 3.5 mm; the average thickness of the inner coating is 0.2mm; the average thickness of the fertilizer layer is 0.4mm; the average thickness of the outer coating is 0.2mm.

[0067] In Example 2 of a slow-release fertilizer for rice, the slow-release fertilizer for rice is spherical particles, which are sequentially from inside to outside: nutrient core, inner coating, fertilizer layer an...

Embodiment 1

[0070] (1) According to the components and weight parts of Example 1 in Table 1, after mixing nitrogen, phosphorus and potassium compound fertilizer, trace element fertilizer, silicon fertilizer, calcium fertilizer, magnesium fertilizer and sulfur fertilizer, the inclination angle is 40°, and the rotation speed is 10r / min, temperature is 50°C, steam pressure is 0.3MPa, carry out steam drum granulation for 5min, sieve until the average particle size is 3.5mm, and obtain nutrient core;

[0071] (2) According to the components and weight parts of Example 1 in Table 1, dissolve sodium alginate, carboxymethyl chitosan and nitrification inhibitor in 320 parts by weight of water, spray at 70 ° C with a flow rate of 40 kg / min, At a rotating speed of 12r / min, heat and rotate the surface of the nutrient core obtained in step (1) until the spraying is completed and the moisture content is ≤ 4%, and the nutrient core coated with the inner coating is obtained;

[0072] (3) According to the...

Embodiment 2

[0075] (1) According to the components and weight parts of Example 2 in Table 1, after mixing nitrogen and potassium compound fertilizer, trace element fertilizer, silicon fertilizer, calcium fertilizer, magnesium fertilizer and sulfur fertilizer, the inclination angle is 35° and the rotation speed is 8r / min, at a temperature of 40°C and a steam pressure of 0.2 MPa, perform steam drum granulation for 4 minutes, and sieve until the average particle size is 3.0 mm to obtain nutrient cores;

[0076] (2) Dissolve sodium alginate, carboxymethyl chitosan and nitrification inhibitor in 150 parts by weight of water according to the components and parts by weight of Example 2 in Table 1, spray at 60°C with a flow rate of 30kg / min , at a rotating speed of 8r / min, heat and rotate the surface of the nutrient core obtained in step (1) until the spraying is completed and the moisture content is ≤ 3%, and the nutrient core coated with the inner coating is obtained;

[0077] (3) According to...

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Abstract

The invention relates to a rice slow-release fertilizer and preparation and application methods thereof, the rice slow-release fertilizer is spherical particles, and sequentially comprises a nutrientcore, an inner coating, a fertilizer layer and an outer coating from inside to outside; the nutrient core comprises the following main components: nitrogen-phosphorus-potassium or a nitrogen-potassiumcompound fertilizer, a trace element fertilizer, a silicon fertilizer, a calcium fertilizer, a magnesium fertilizer and a sulfur fertilizer; the inner coating comprises the following main components:sodium alginate, carboxymethyl chitosan and a nitrification inhibitor; the fertilizer layer comprises the following main components: an organic fertilizer, ammonium chloride and a microbial agent; and the outer coating comprises the following main components: attapulgite and ethyl cellulose. The invention also discloses a preparation method and an application method of the rice slow-release fertilizer. The rice slow-release fertilizer disclosed by the invention is rich and diverse in fertilizer, matched with rice growth requirements, appropriate in release speed and high in fertilizer utilization rate. The slow-release fertilizer prepared by the method is uniform in particles, simple in process, low in cost and suitable for industrial production. According to the application method, fertilizer utilization is efficient and reasonable, the yield is guaranteed, and environmental pollution and waste are reduced.

Description

technical field [0001] The invention relates to a slow-release fertilizer and a preparation and application method thereof, in particular to a rice slow-release fertilizer and a preparation and application method thereof. Background technique [0002] Native to China and India, rice has been cultivated since 7,000 years ago and is the main food source in Asia. In order to increase grain production, in addition to the development of new rice varieties, increasing the use of fertilizers is the most simple and direct way to pursue high quality and high yield. However, for a long time, the excessive application of fertilizers has been common. Although this has achieved an increase in income to a certain extent, it not only makes rice green and late-maturing, lodging, and quality decline, but also has potential and persistent pollution to the environment and soil. How to achieve sustainable land development while ensuring crop yields and economic benefits has always been a probl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/40C05G5/14C05G5/30A01G22/22A01C21/00
CPCA01C21/005A01G22/22C05C3/00C05G3/00C05G3/40C05G5/14C05G5/30C05D3/02C05D5/00C05D9/00C05D9/02C05F3/00C05F5/002C05F11/08C05G1/00
Inventor 熊忠伟江云李智强秦鱼生上官宇先江光华周厚川
Owner 熊忠伟
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