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Corn straw granular fertilizer and preparation method thereof

A corn stalk and granular fertilizer technology, applied in nitrogen fertilizer, potash fertilizer, magnesium fertilizer and other directions, can solve the problems of slow decomposition, poor quality of straw returning to the field, poor enthusiasm, etc., to improve yield and quality, improve fertilizer utilization rate, reduce The effect of the number of times of fertilization

Inactive Publication Date: 2018-11-13
INST OF AGRI RESOURCES & ENVIRONMENT SHANDONG ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, my country's agricultural straw is large in quantity and bulky, and the soil holding capacity is limited, so it cannot be completely absorbed; the quality of straw returned to the field is poor, which affects the growth of subsequent crops, and even causes a reduction in production; the direct return of straw to the field decomposes slowly and cannot be quickly fertilized; When the amount of returning to the field is large, it will affect the operation of field machinery; the operation of farmers returning to the field is complicated and their enthusiasm is low

Method used

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  • Corn straw granular fertilizer and preparation method thereof
  • Corn straw granular fertilizer and preparation method thereof
  • Corn straw granular fertilizer and preparation method thereof

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preparation example Construction

[0032] The present invention also provides a preparation method of the corn stalk granular fertilizer, comprising the following steps: mixing the raw materials, extruding and granulating, cooling and drying to obtain the corn stalk granular fertilizer.

[0033] In the preparation method of the present invention, the mixing is preferably thermal mixing, and the thermal mixing is preferably mixing in a horizontal blender. The mixing time of the present invention is preferably 5-10 minutes, and the temperature range is 90-130°C. The preferred thermal mixing time and temperature in the present invention can further improve the efficiency of fertilizer granulation.

[0034] In the preparation method of the present invention, there is no special limitation on the extrusion granulation method, a conventional granulator can be used, preferably the raw material is compressed into fertilizer granules with a diameter of 5mm at a rotating speed of 35rpm.

[0035] In the preparation method ...

Embodiment 1

[0039] The corn stalks with a moisture content of less than 30 wt% are crushed into a powdery material with a length of less than 5 mm, ie, straw powder, with a blade grinder, so as to facilitate mixing. The water content of the straw powder is controlled at about 10-16%.

[0040] Weigh 85kg of corn stalks, 25kg of urea, 6kg of phosphate rock powder, 20kg of potassium sulfate, 6kg of potassium dihydrogen phosphate, 3kg of limestone powder, 3kg of magnesium chloride, 3kg of sulfur powder, 3kg of chelated trace elements, 0.6kg of adhesive, slow-release 0.4kg of agent and 15kg of water were fully stirred for 8 minutes by a horizontal blender to obtain a mixed material.

[0041] The mixed material is evenly conveyed to the extruding granulator, and pressed into fertilizer granules with a diameter of 5mm by a rotating speed of 35rpm.

[0042] The fertilizer granules are transported to a cooling dryer for convection cooling and drying, the cooling temperature is below 40° C., and t...

Embodiment 2

[0044] The corn stalks with a moisture content of less than 30 wt% are crushed into a powdery material with a length of less than 5 mm, ie, straw powder, with a blade grinder, so as to facilitate mixing. The water content of the straw powder is controlled at about 10-16%.

[0045] Weigh 77kg of corn stalks, 20kg of urea, 4kg of phosphate rock powder, 10kg of potassium sulfate, 4kg of potassium dihydrogen phosphate, 1kg of limestone powder, 1kg of magnesium chloride, 1kg of sulfur powder, 1kg of chelated trace elements, 0.3kg of adhesive, slow-release 0.1kg of agent, 10kg of water, and fully stirred for 10 minutes by a horizontal blender to obtain a mixed material.

[0046] The mixed material is evenly conveyed to the extruding granulator, and pressed into fertilizer granules with a diameter of 5mm by a rotating speed of 35rpm.

[0047] The fertilizer granules are transported to a cooling dryer for convection cooling and drying, the cooling temperature is below 40° C., and the...

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Abstract

The invention provides a corn straw granular fertilizer and belongs to the technical field of straw fertilizer preparation. The granular fertilizer comprises the following raw materials in parts by weight: 77-90 parts of corn straw, 20-36 parts of urea, 4-8 parts of powdered rock phosphate, 10-25 parts of potassium sulfate, 4-10 parts of monopotassium phosphate, 1-5 parts of limestone flour, 1-5 parts of magnesium chloride, 1-5 parts of sulfur powder, 1-4 parts of chelated trace elements, 0.3-0.8 part of an adhesive, 0.1-0.5 part of a slow-release agent and 10-20 parts of water. By adopting the corn straw granular fertilizer provided by the invention, the yield can be increased by 7.2-19.8%, and the quality of vegetables can be also improved.

Description

technical field [0001] The invention belongs to the technical field of straw fertilizer preparation, and in particular relates to a corn straw granular fertilizer and a preparation method thereof. Background technique [0002] Straw is rich in organic matter, nitrogen, phosphorus, potassium, and trace elements needed by crops. If it is returned to the field safely and effectively, it will significantly increase the effective nutrient content in the farmland soil, which will help realize the reduction of chemical fertilizers and storage of grain on the ground. Target. [0003] At present, my country's agricultural straw is large in quantity and bulky, and the soil holding capacity is limited, so it cannot be completely absorbed; the quality of straw returned to the field is poor, which affects the growth of subsequent crops, and even causes a reduction in production; the direct return of straw to the field decomposes slowly and cannot be quickly fertilized; When the amount of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/08C05G3/90
CPCC05B7/00C05G3/00C05G3/90C05B17/00C05C9/00C05D1/02C05D3/02C05D5/00C05D9/00C05D9/02Y02P60/21
Inventor 田慎重张玉凤郭洪海董亮边文范高燕
Owner INST OF AGRI RESOURCES & ENVIRONMENT SHANDONG ACADEMY OF AGRI SCI
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