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Device for quantitative determination of mass flow and diffusion of soil and application of device

A quantitative measurement and soil technology, which is applied in the field of soil science, can solve the problems of devices and methods that do not retrieve mass flow and diffusion characteristics, rapid changes in soil nutrients, and uneven transpiration, and achieve low cost, simple production, and easy operation. easy effect

Active Publication Date: 2016-02-10
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional method mostly uses the transpiration of plant transpiration to estimate the amount of mass flow. However, the rapid change of soil nutrients, uneven transpiration, and environmental changes all limit the accuracy of this method.
In the existing invention patents, no relevant devices and methods for measuring mass flow and diffusion characteristics in soil have been retrieved

Method used

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  • Device for quantitative determination of mass flow and diffusion of soil and application of device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] see figure 1 , a device for quantitatively measuring soil mass flow and diffusion, consisting of a first fraction collector 1, a polyethylene barrel 2, a polyethylene frame 3, a polyarylethersulfone filter membrane 4, a second fraction collector 5, and a second reagent bottle 6. Composition of the second micropump 7, the second micropump 8, the first absorption probe 9, the first micropump 10, the first micropump 11, the first reagent bottle 12, and the second absorption probe 13 .

[0019] After the first reagent bottle 12 and the first micropump 11 are connected, insert the first absorption probe 9 as the water inlet pipeline, and after the first fraction collector 1 and the first micropump 10 are connected, insert the first absorption probe 9 as the outlet line. The water pipeline constitutes a passage. After the second reagent bottle 6 and the second microsuction pump 7 are connected, the second absorption probe 13 is inserted as the water inlet pipeline. After the...

Embodiment 2

[0026] (1) Soil collection: collect the clay loam on the surface of Xianju, take it back and pass it through a 4mm sieve, dry it naturally in a cool and ventilated place, pass it through a 2mm sieve, and bag it for later use;

[0027] (2) Soil addition: Weigh 30g of the prepared soil sample above, slowly add it into a polyethylene bucket, add 15ml of ultrapure water to the soil, so that the soil water content exceeds the maximum water holding capacity of the soil;

[0028] (3) Extraction perfusion: turn on the second microsuction pump 7 and the first microsuction pump 11 to extract ultrapure water and a dextran solution with a molecular weight of 20 kDa and a mass fraction of 5% to the first absorption probe 9, In the second absorption probe 13, the probe is filled with ultrapure water and dextran solution;

[0029] (4) Sample collection: turn on the second micropump 8 and the first micropump 10, set the second micropump 7, the first micropump 11, the second micropump 8, and t...

Embodiment 3

[0031] (1) Soil collection: collect the surface silt loam soil in Xiaoshan, pass it through a 4mm sieve after retrieval, pass it through a 2mm sieve after natural air drying in a cool and ventilated place, and bag it for later use;

[0032] (2) Soil addition: Weigh 30g of the prepared soil sample above, slowly add it into a polyethylene bucket, add 15ml of ultrapure water to the soil, so that the soil water content exceeds the maximum water holding capacity of the soil;

[0033] (3) Extraction perfusion: turn on the second microsuction pump 7 and the first microsuction pump 11 to extract ultrapure water and a dextran solution with a molecular weight of 20 kDa and a mass fraction of 5% to the first absorption probe 9, In the second absorption probe 13, the probe is filled with ultrapure water and dextran solution;

[0034] (4) Sample collection: turn on the second micropump 8 and the first micropump 10, set the second micropump 7, the first micropump 11, the second micropump 8,...

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Abstract

The invention provides a device for quantitative determination of mass flow and diffusion of soil. The device is composed of reagent bottles, micro suction pumps, micro pumping pumps, absorption probes, fraction collectors and the like, wherein the lower 4 / 5 part of each absorption probe is a polyethylene frame, in which dense small holes are formed; each polyethylene frame is coated with a layer of polyether sulphone filter membrane; the first reagent bottle is filled with ultrapure water; the second reagent bottle is filled with a dextro-glucoside solution with the molecular weight of 15-20kDa and mass fraction of 1%-20%. By using the device and adopting an ionodialysis technology and the glucoside leachate, the mass flow and diffusion amount in the soil can be evaluated accurately, the transfer laws of different nutrient ions are effectively distinguished and a method basis is provided for comprehensive management and ecological regulation and control of nutrient resources. The device is reasonable in design, simple to manufacture, simple and convenient to operate and suitable for popularization and application.

Description

technical field [0001] The invention belongs to the field of soil science, and relates to a research method for soil nutrient absorption, in particular to a device for quantitatively measuring soil mass flow and diffusion, and the application of the device. Background technique [0002] Mass flow, diffusion, and root interception are the three main pathways for soil nutrients to enter the rhizosphere. In the plant nutrient uptake, the amount intercepted by the root system is very small, especially for macronutrients. Therefore, in most cases, mass flow and diffusion are the main ways for plant roots to obtain nutrients. Mass flow refers to the process in which nutrients in the soil flow from the soil solution to the roots through the transpiration of plants to reach the rhizosphere. Due to transpiration, the water potential gradient from the plant leaves along the stem and root to the soil is produced. Under the action of this gradient, water enters the root from the soil ...

Claims

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Application Information

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IPC IPC(8): G01N33/24
Inventor 马庆旭吴良欢
Owner ZHEJIANG UNIV
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