Compound slow-release nitrogen fertilizer

A technology of nitrogen fertilizer and ammonium nitrogen, applied in fertilization equipment, fertilizer mixture, application, etc., can solve the problems of nitrogen fertilizer loss, inability to extend the validity period of nitrogen fertilizer, and inability to improve nitrogen fertilizer utilization rate

Inactive Publication Date: 2014-06-11
AVIC FERTILIZER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, it can only promote the absorption of nitrogen by crops, but cannot extend the validity period of nitrogen fertilizer itse...

Method used

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  • Compound slow-release nitrogen fertilizer

Examples

Experimental program
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Effect test

Embodiment 1

[0038] In a disc granulator, add 10 kg of powdered ammonium chloride and 10 kg of powdered oxamide in the storage hopper above the disc granulator.

[0039] Rotate the ammonium chloride in the disc granulator, spray 1-2kg of water to the surface of ammonium chloride through the high-pressure atomizing nozzle, and when the ammonium chloride has some viscosity, open the storage head and add oxalamide to the ammonium chloride at a uniform speed , the rotation speed of the disc in the disc granulator is 50-70r / min, and then the obtained mixture is sieved and dried at a temperature of 50°C-120°C to obtain a diameter of 2mm-4.5mm, strength The spherical slow-release nitrogen fertilizer particles of 10N-100N will last for 50-100 days for the corresponding nitrogen release period.

Embodiment 2

[0041] In a disc granulator, add 10 kg of powdered ammonium sulphate and 10 kg of powdered oxamide in the storage hopper above the disc granulator.

[0042] Rotate the ammonium sulfate in the disc granulator, and spray 1-2kg of water on the surface of ammonium sulfate through the high-pressure atomizing nozzle. The rotation speed of the disc in the granulator is 50-70r / min, and then the obtained mixture is sieved and dried at a temperature of 50°C-120°C to obtain a pellet with a diameter of 2mm-4.5mm and a strength of 10N-100N The spherical slow-release nitrogen fertilizer granules, corresponding to the nitrogen release period, will last for 50-100 days.

Embodiment 3

[0044] In a disk granulator, add 10kg of powdery ammonium sulfate and 20g of dicyandiamide and mix well, and add 10kg of powdery oxamide in the storage hopper above the disk granulator.

[0045] Rotate the ammonium sulfate in the disc granulator, and spray 1-2kg of water on the surface of ammonium sulfate through the high-pressure atomizing nozzle. The rotation speed of the disc in the granulator is 50-70r / min, and then the obtained mixture is sieved and dried at a temperature of 50°C-120°C to obtain a pellet with a diameter of 2mm-4.5mm and a strength of 10N-100N The spherical slow-release nitrogen fertilizer particles corresponding to the nitrogen release period will last for 70 to 120 days.

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Abstract

The invention relates to a compound slow-release nitrogen fertilizer, which comprises 0.1-95 percent by mass of oxamide, 0-5 percent by mass of inhibitor and 0-95 percent of nitrogen fertilizer. By adopting the oxamide, inhibitor and nitrogen fertilizer in the compound slow-release nitrogen fertilizer, the applied nitrogen fertilizer is effectively prevented from being brought away by water, nitrogen is kept in soil in the presence of the inhibitor, loss due to excessive conversion is prevented, the own shelf life of the nitrogen fertilizer is prolonged remarkably, and the utilization ratio of the nitrogen fertilizer is increased, thereby ensuring slow release supply of nitrogen needed in the entire growing period.

Description

technical field [0001] The invention relates to the field of agricultural chemicals, in particular to a composite slow-release nitrogen fertilizer. Background technique [0002] In various agricultural production activities, nitrogen fertilizers are usually applied to the soil to increase crop yields. However, the nitrogen fertilizer in the soil is quickly ammolyzed by nitrification, and the resulting nitrate is quickly washed away from the soil to pollute the environment, and the washed away part can no longer be used for crop nutrition, resulting in lower nitrogen use efficiency. [0003] However, although various traditional nitrogen fertilizers try to improve the utilization rate of nitrogen in nitrogen fertilizers through various methods, for example, adding polyamic acid synergists on the basis of traditional urea, to strengthen the crops' nitrogen, phosphorus, Absorption of potassium and trace elements. [0004] However, it can only promote the absorption of nitrog...

Claims

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Application Information

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IPC IPC(8): C05G3/00
Inventor 张肖飞郭长青李清霞秦爱国姜琳琳
Owner AVIC FERTILIZER
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