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In-situ monitoring device and determination method for soil ammonia volatilization

A measurement method and technology of monitoring device, which can be applied to measurement devices, instruments, scientific instruments, etc., can solve problems such as the limitation of measurement technology level, difficulty in reflecting the actual situation in the field, etc. Effect

Active Publication Date: 2016-06-29
HENAN AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] To sum up, due to the limitation of measurement technology level, the current research on soil ammonia volatilization has long been based on pot experiments, indoor simulations and closed containers, and the results obtained cannot reflect the actual conditions in the field.

Method used

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  • In-situ monitoring device and determination method for soil ammonia volatilization
  • In-situ monitoring device and determination method for soil ammonia volatilization
  • In-situ monitoring device and determination method for soil ammonia volatilization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A soil ammonia volatilization in-situ monitoring device, see figure 1 , 2 , including a cylinder 1, a top cover 2 and a bottom plate 3, the top cover 2 (diameter 18cm) is set on the top of the cylinder 1, and the bottom plate 3 is set on the outer wall of the lower part of the cylinder 1 (5cm from the bottom of the cylinder 1) ; The cylinder 1 is an equal-diameter cylindrical cylinder (inner diameter 15.5cm, outer diameter 16cm, height 20cm) open at both ends, and its top is provided with two layers of sponge (thick 1.5cm, diameter 15.5cm), and the outside of the sponge The edge matches the inner wall of the cylinder 1; the cylinder 1 on the upper part of the chassis 3 is evenly distributed with 4 lower ventilation holes 6 (round holes, 1 cm in diameter, 6 cm away from the bottom of the cylinder 1), the cylinder 1 There are also 3 upper ventilation holes 7 evenly distributed on the top edge (each 0.5cm high, 12cm long, in the shape of a belt). The chassis 3 is in the ...

Embodiment 2

[0043] An in-situ monitoring device for soil ammonia volatilization, comprising a cylinder, a top cover and a chassis, the top cover is arranged on the top of the cylinder, the chassis is arranged on the outer wall of the lower part of the cylinder; The square cylinder has two layers of sponge on its upper part, and the outer edge of the sponge matches the inner wall of the cylinder; four lower ventilation holes are evenly distributed on the cylinder on the upper part of the chassis, and the top edge of the cylinder is also There are 3 upper ventilation holes evenly distributed. The chassis is in the shape of a square ring, which surrounds the outer wall at the lower quarter height of the cylinder to form an outer edge with a certain width.

[0044] The cylinder body, the top cover and the chassis are all made of common polyvinyl chloride in the building material market, and the material cost is relatively low. The lower layer of sponge is arranged above the lower air hole, a...

Embodiment 3

[0046] A method for measuring soil ammonia volatilization, comprising the following steps:

[0047] (1) Sponge soaking solution: soak the two layers of sponges in the in-situ monitoring device for soil ammonia volatilization described in Example 1 with the glycerol phosphate solution, and soak them in 20mL respectively, the sponge absorbs saturated and does not drip; Raw material composition by volume percentage: phosphoric acid 10%, glycerol 4%, distilled water 86%;

[0048] (2) Sampling: Place the soil ammonia volatilization in-situ monitoring device in the selected plot, put the cylinder below the chassis into the soil, replace the lower sponge at regular intervals, take out the lower sponge, quickly put it into a bag and seal it, and at the same time Change another sponge immersed in the glycerol phosphate solution of 20mL to continue sampling; the lower sponge replacement interval is: 7 days before sampling, 24h interval, and 72h interval after 7 days; this step also incl...

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Abstract

The invention particularly relates to a soil ammonia volatilization in-situ monitoring device and a detection method. The device comprises a cylinder body, a top cover and a base plate; the top cover is arranged at the top of the cylinder body; the base plate is arranged on the outer wall of the lower part of the cylinder body; the two ends of the cylinder body are opened, two layers of sponge, which are adjacent, are arranged at the upper part of the cylinder body; the outer edges of the sponge are matched with the inner wall of the cylinder body; three to five lower vent holes are uniformly formed in the cylinder body and at the upper part of the base plate; two to four vent holes are uniformly formed in the edge of the top of the cylinder body. The detection method is carried out through the device, comprises the steps of sponge steeping, sampling, calibration testing, ammonia testing, calculating and the like, and not only is applicable to plot experiment and multi-factor contrastive study but also can reflect the field reality.

Description

technical field [0001] The invention belongs to the technical field of soil ammonia volatilization monitoring, and in particular relates to an in-situ monitoring device and measurement method for soil ammonia volatilization. Background technique [0002] At present, increasing nitrogen (N) fertilizer input is one of the main ways to develop agricultural production, but after nitrogen fertilizer is applied to the soil, most of it will be lost to the environment through various ways, among which ammonia (NH 3 ) volatilization is an important way of nitrogen fertilizer gaseous loss. It is estimated that the annual application of chemical nitrogen fertilizer and organic nitrogen fertilizer in the world is about N78 million tons and N33 million tons respectively, and the loss of ammonia volatilization accounts for about 14% and 23% of the application amount respectively. At the same time, as people's demand for food increases, the amount of nitrogen fertilizer is also increasing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00
Inventor 谢迎新张淑利袁超靳海洋白雪莹刘园王晨阳
Owner HENAN AGRICULTURAL UNIVERSITY
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