Sampling device of grassland plant roots

Abstract

The invention discloses a sampling device of grassland plant roots. The sampling device comprises a ring tool, a tray and a traction mechanism used for pushing the tray into the ring tool. The ring tool is a hollow cylinder; the bottom of the ring tool is provided with a serrated blade; the top edge of the ring tool is provided with fasteners; the tray comprises a tray body and a fixing socket arranged on the surface of the tray body; the tray body can move in the ring tool along its axis; the traction mechanism comprises a transverse bar, a rotating bar, a sliding sleeve and hooks. The traditional way in which an undisturbed soil sample is ejected out of the ring tool is changed, the disturbance of a jack upon the undisturbed soil sample in the ring tool is avoided, human error is reduced, completeness of plant roots is ensured, sample acquisition precision is improved, field work efficiency is improved, and time and labor consumption is reduced.

Description

technical field [0001] The invention relates to the field of soil ecology, in particular to a grassland plant root system sampling device. Background technique [0002] At present, in the actual field research practice, the specific operation process of sampling for the biomass allocation of grassland plant population reproductive resources includes the following aspects: [0003] 1. The sampling device for biomass distribution of reproductive resources adopts the ring knife method, and the large-diameter ring knife (20cm in diameter, 30-40cm in height, and 7mm in thickness, whose volume participates in data calculation, i.e. fixed volume sampling) samples; [0004] 2. When sampling in the field, use a hammer (18 pounds or 24 pounds) to directly insert the ring knife into the soil according to the scale mark on the ring knife; [0005] 3. After the ring cutter is inserted into the soil at the corresponding depth, the soil around the ring cutter is cut open with tools such a...

AI Technical Summary

Problems solved by technology

[0008] 1. The ring knife is not easy to carry; it is easy to shake left and right when sampling with the ring knife, which affects the sampling accuracy; although the hammer is used to insert the ring knife into the soil, the upper part of the ring knife is padded with wooden blocks to protect the ring knife, but in the specific operation The middle wooden block is easy to slip, and the hammer often hits the edge of the ring knife directly, which easily deforms the ring knife and even injures the test staff, which affects the sampling safety and sampling accuracy, and the difference in the test data is large; A certain destructive effect leads to a low reuse rate of the ring knife, which not only wastes resources, but also takes time and labor, and the efficiency of field work is significantly reduced

[0009] 2. After the ring cutter is inserted into the soil to the corresponding depth, it is necessary to use tools such as shovel to cut the soil around the ring cutter, so that a soil pit will be formed around the ring cutter. For the test sample plot (or grassland), the soil pit belongs to Destructive impact; if large-scale experimental design requires a large number of samples to be collected, only the field sample collection involved in this research will have a great destructive effect on the grassland, and the sample plot managers or herdsmen will not allow (or authorize) ) Relevant scientific research personnel enter the sample site to carry out relevant scientific experiment activities

[0010] 3. Due to the small contact area between the jack and the undisturbed soil in the ring cutter, the force is uneven, and the undisturbed soil is not easy to be pushed out, which is time-consuming and laborious and inefficient; the undisturbed soil in the ring cutter is easily disturbed (or destroyed) by the jack and damages the plants. The root system of an individual plant (clump) will be separated from the individual plant (clump) after the original complete root system is damaged. The separated root system cannot participate in the statistical analysis in the subsequent data analysis, and the accuracy and effectiveness of the data will be significantly reduced. Scientific research The reliability of the results is then reduced

It can be seen that the cost of test materials has increased significantly, and the recycling rate of ring knives is low, resulting in a serious waste of resources

[0012] 5. When sampling in batches, each ring knife needs to be matched with a nylon mesh bag. When the number of samples is large, the consumption of nylon mesh bags is also very large, and there is indeed a certain waste of resources.

[0013] 6. The serrations at the lower end of the ring knife are in the shape of a blade wedge. When the ring knife is inserted into the soil, when relatively large stones are often encountered, the blade will become blunt and deformed, and the ring knife will be damaged at any time; The disturbed undisturbed soil is compact and hard. Even with a blade-shaped ring knife for sampling, the process of inserting the ring knife into the soil is time-consuming and laborious

Images