Dissolving-out analog device and method for measuring sustained-release fertilizer nutrients

A technology of slow-release fertilizers and simulation devices, which is applied in the direction of measuring devices, analytical materials, instruments, etc., can solve the problems of easy volatilization of extraction solutions, achieve the effects of shortening extraction time, avoiding errors, and easy and accurate calculation

Inactive Publication Date: 2011-12-14
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems that the extraction method of slow-release fertilizers in water is quite different from the actual nutrient release, and the extraction solution is easy to volatilize after raising the extraction temperature, there is an urgent need for a dissolution simulation device for the determination of nutrients in different types of slow-release fertilizers. and simulation methods to solve the problems of quantitatively evaluating the nutrient release rate of slow-release fertilizers and judging their controlled-release performance and characteristics of nutrients

Method used

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  • Dissolving-out analog device and method for measuring sustained-release fertilizer nutrients
  • Dissolving-out analog device and method for measuring sustained-release fertilizer nutrients

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In this example, the simulation device and simulation method described in the detailed description are used to measure the nutrient release rate of coated urea.

[0039] Take by weighing coated urea (43-0-0) sample 10.00g, take by weighing 250g of inert substance (particle diameter is the glass beads of 2-3cm), put coated urea and inert substance into the leaching column after mixing uniformly, Add 500ml distilled water to the solution receiving bottle, press figure 1 Connect the device well, set the temperature of the thermostat to 60°C, and carry out the simulation test.

[0040] Use the Kjeldahl method to measure the total nitrogen content in the drench solution. The total nitrogen content of the drench solution is 215 mg / L at the first hour, 598 mg / L at the 3rd h, and 963 mg at the 5th h. / L, the total nitrogen content of the drench solution was 1236mg / L at the 7th hour, the total nitrogen content of the drench solution was 2262mg / L at the 24th h, the total nitroge...

Embodiment 2

[0051] In this example, the simulation device and simulation method described in the detailed description are used to measure the nutrient release rate of the coated compound fertilizer.

[0052] Weigh 10.00g of the coated compound fertilizer (20-8-10) sample, weigh 250g of the inert substance (glass beads with a particle size of 2-3cm), mix the coated compound fertilizer and the inert substance evenly, and put it into the leaching column , add 500ml of distilled water to the solution receiving bottle, press figure 1 Connect the device well, set the temperature of the thermostat to 60°C, and carry out the simulation test.

[0053] Use the Kjeldahl method to measure the total nitrogen content in the drench solution. The total nitrogen content in the drench solution is 96 mg / L at the first hour, 196 mg / L at the 3rd h, and 320 mg at the 5th h. / L, the total nitrogen content of the drench solution was 516mg / L at the 7th hour, the total nitrogen content of the drench solution was ...

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Abstract

The invention relates to a dissolving-out analog device and a dissolving-out analog method for measuring sustained -release fertilizer nutrients. The device comprises an eluviation pillar, a thermometer, a diversion tube, a solution accommodating bottle, a sampling tube, a condensation cavity, an electromagnetic stirring and heating element, a magnetic force stirring rod, a thermostat and a temperature probe, wherein a sustained -release fertilizer to be measured and inert substances are positioned in the eluviation pillar; the solution accommodating bottle is connected to the bottom of the eluviation pillar through the diversion tube; the thermometer is inserted into the eluviation pillar from a feed inlet on the top of the eluviation pillar; the sampling tube is inserted into the solution accommodating bottle for periodic sampling; the electromagnetic stirring and heating element is arranged below the solution accommodating bottle; the magnetic force stirring rod is arranged on the bottom surface inside the solution accommodating bottle; and the thermostat is arranged below the electromagnetic stirring and heating element. Compared with the prior art, the dissolving-out analog device solves the problems that the time of leaching operation is long, the efficiency is low, and leaching results cannot reflect the actual effect in the conventional sustained-release fertilizer leaching device.

Description

technical field [0001] The invention relates to a device for measuring fertilizer nutrient, in particular to a stripping simulation device and simulation method for slow-release fertilizer nutrient measurement. Background technique [0002] Slow-release fertilizer is a new type of value-added fertilizer in the era of low-carbon economy, and it is also an important direction of fertilizer development in the 21st century. The biggest feature of slow-release fertilizers is to strive to synchronize nutrient release and crop absorption, simplify fertilization technology, and realize one-time fertilization to meet the needs of crops throughout the growth period, with less fertilizer loss, high utilization rate, and environmental friendliness. Therefore, slow-release fertilizers are called "green and environmentally friendly fertilizers in the 21st century, which is a revolution in fertilizer production technology". [0003] The nutrient release rate and release period of slow-rel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N13/00
Inventor 张小沁刘刚段路路
Owner SHANGHAI RES INST OF CHEM IND
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