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 environmenta

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

Example Embodiment

[0017] Example 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 membrane 4, a second fraction collector 5, and a second reagent bottle 6. The second micro suction pump 7, the second micro suction pump 8, the first absorption probe 9, the first micro suction pump 10, the first micro suction pump 11, the first reagent bottle 12, and the second absorption probe 13 .

[0019] After the first reagent bottle 12 and the first micro-suction pump 11 are connected, the first absorption probe 9 is inserted as the water inlet pipe, and the first fraction collector 1 and the first micro-suction pump 10 are connected and the first absorption probe 9 is inserted as the outlet. The water pipeline forms a pathway. After the second reagent bottle 6 and the second micro suction pump 7 are connected, the second absorption probe 13 is inserte...

Example Embodiment

[0025] Example 2

[0026] (1) Soil collection: Collect the surface clay loam of Xianju, pass it through a 4mm sieve after taking it back, and then pass it through a 2mm sieve after natural air drying in a cool and ventilated place, and bag it for later use;

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

[0028] (3) Extraction solution perfusion: turn on the second micro-suction pump 7 and the first micro-suction pump 11 respectively to extract ultrapure water, a 5% dextran solution with a molecular weight of 20kDa and a mass fraction 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 micro pump 8, the first micro pump 10, set the second micro pump 7, the first mi...

Example Embodiment

[0030] Example 3

[0031] (1) Soil collection: Collect the surface silt loam of Xiaoshan, and pass it through a 4mm sieve after retrieving it, and then 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 soil sample prepared above, slowly add it to a polyethylene bucket, and add 15ml of ultrapure water to the soil to make the soil water content exceed the maximum water holding capacity of the soil;

[0033] (3) Extraction solution perfusion: turn on the second micro-suction pump 7 and the first micro-suction pump 11 respectively to extract ultrapure water, a 5% dextran solution with a molecular weight of 20kDa and a mass fraction 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 micro pump 8, the first micro pump 10, set the second micro pump 7, the fir...

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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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