Multifunctional collection device for in-situ collection of rhizosphere and non-rhizosphere soil

Abstract

The invention discloses a multifunctional collection device for in-situ collection of rhizosphere and non-rhizosphere soil, which comprises a first elastic pipeline for containing a main root system of a plant, a second elastic pipeline for containing a side root system is arranged on the first elastic pipeline, and the other end of the first elastic pipeline and the other end of the second elastic pipeline are both provided with a water-permeable and gas-permeable membrane. A plurality of communicating mechanisms with water conveying and soil suction functions are arranged in the pipe wall of the first elastic pipeline, different communicating mechanisms correspond to and communicate with the pipe wall of the second elastic pipeline in a one-to-one mode, a cavity is formed in the pipe wall of the second elastic pipeline, an annular partition plate connected with the cavity is arranged in the cavity, the annular partition plate divides the cavity into a containing cavity and an extending cavity, the communicating mechanism is communicated with the containing cavity and the extending cavity, a first through hole is formed in the end of the second elastic pipeline and communicated with the extending cavity, elastic layers are arranged on the peripheries of the first elastic pipeline and the second elastic pipeline, and the device can conduct synchronous wrapping along with plant root growth and rapidly achieve lossless sampling.

Description

technical field [0001] The invention relates to a collection device, in particular to a multifunctional collection device for collecting rhizosphere and non-rhizosphere soil in situ. Background technique [0002] The plant root system is an important bridge connecting the soil and the aboveground part, and plays an important role in absorbing water and nutrients. At the same time, the rhizosphere is very active, secreting specific organic compounds, and accelerating the remediation efficiency of heavy metal-contaminated soil. Root exudates refer to a wide variety of substances secreted or released from different parts of the root system into the growth medium during plant growth. Root exudates are not only considerable in quantity, but also very effective. Root exudates significantly alter the physical, chemical, and biological properties of the root-soil interface, and thus have an important impact on the bioavailability of various nutrients in the soil. [0003] Since th...

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Problems solved by technology

[0003] Since the planting test of the sample plants needs to be carried out in an environment with very similar growth conditions throughout the growth cycle, and the collection of most root plant exudates has many limitations, such as only destructive sampling, and the growth of plant roots During the process, the root system will gradually become longer and more densely covered in the soil, making it difficult to take out samples. After the plant roots are taken out of the soil, the space occupied by the plant roots in the original planting soil collapses and is refilled. When planting roots, the soil needs to be dug up and re-embedded, so the distribution of the soil will be significantly affected every time it is taken out, resulting in the inability to put the samples back into the same or similar growth environment, which significantly affects the growth of plant roots. Drastic changes in the environment are not conducive to understanding the true growth of plant roots

[0004] In addition, in the process of collecting the rhizosphere and non-rhizosphere soil of plants, the soil that can accurately reflect the actual data can only be collected near the roots of the plants. The existing equipment cannot realize fast collection according to actual needs, and the operation is inconvenient

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