Plant rhizosphere micro soil sampling device

Abstract

The invention discloses a plant rhizosphere micro soil sampling device which mainly comprises a micro soil sampling needle, a mechanical telescopic arm, a central control system and a slideway. The central control system is arranged on the slideway, the mechanical telescopic arm is fixed on the central control system, and the micro soil sampling needle is arranged at an end part of the mechanicaltelescopic arm. The device disclosed by the invention is used for collecting micro rhizosphere soil samples at different positions and different depths in refined agronomy and botanical science experiments, meanwhile, the health of a root system is protected to the greatest extent, and a soil structure is reserved. Relatively reliable sample collection means are provided for the refined agronomicand botanical scientific experiments.

Description

technical field [0001] The invention belongs to the technical field of agronomy, and in particular relates to a plant rhizosphere trace soil extraction device. Background technique [0002] Field experiments and pot experiments are important research methods in the fields of agronomy and botany. By analyzing the biochemical reactions between roots and soil, we can explore the growth and development, metabolism, secretion, and growth of plants under controlled artificial conditions. Material energy exchange. During the test, it is often necessary to collect potted or near-surface plant rhizosphere soil samples for analysis and testing, and the problem of sample collection is often the key to restricting the detailed analysis. There are two main technical difficulties. [0003] (1) Sampling perturbation problem. The collection of rhizosphere soil samples needs to be continuous, and the rhizosphere environment should not be violently disturbed, and the soil pore structure sho...

AI Technical Summary

Problems solved by technology

[0004] (2) Mechanics of piercing

[0006] (1) Direct excavation: The area affected by this method is too large, the disturbance to the plant rhizosphere environment is too severe, and even the normal physiological process of the plant is destroyed, making the plant unable to be used for continuous observation and research

[0007] (2) Ring knife collection: If the ring knife is directly drilled into the surface, the sampling depth is not enough, and it is difficult to study the complete rhizosphere; if the soil profile is excavated and then drilled into the ring knife, the efficiency is very low, often in order to form a 1m deep longitudinal section , need to excavate at least 1m 3 At the same time, the original soil structure will be destroyed in a large area, and the plant rhizosphere environment will be severely disturbed

[0008] (3) Soil auger collection: This method requires vertical drilling of stainless steel soil augers, but the deeper the sampling depth, the greater the resistance, often requiring the use of hydraulic machinery to complete soil extraction; moreover, the cutting edge of the soil auger is often unable to cut off the root system, thus dragging the root system , affect the distribution of the original root system of the plant, and even cause a large number of fractures to the root system, and the wound fluid infiltrates the rhizosphere soil, which will bring unpredictable variables to the next sampling; at the same time, after the soil auger is pulled out, the formed cavity is difficult to backfill well , it is easy to form preferential flow here, which is not conducive to protecting the original rhizosphere soil hydraulic conditions

Images