The method of taking peat cores from peatlands in winter

A peat and column core technology, which is applied to sampling devices and other directions, can solve problems such as the difficulty of depositing column cores in peat fields, and achieve the effects of convenient and rapid cutting and separation, lightweight sampling tools, and simple and fast sampling methods.

Active Publication Date: 2019-02-19
NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the technical problem that it is difficult to collect peat cores from peatlands in winter in the existing method, and provides a method for collecting peat cores from peatlands in winter

Method used

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  • The method of taking peat cores from peatlands in winter

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specific Embodiment approach 1

[0021] Specific embodiment one: the method for taking the peat column core of peatland in winter in this embodiment is carried out according to the following steps:

[0022] 1. The peat core collection time is set in the early winter season, and the freezing depth of the peat surface is 5-15cm;

[0023] 2. Along the cross-section of the peatland, use the probe rod to detect the thickness of the peat above the permafrost layer of the peatland (you can judge the length of the probe rod when touching the bottom of the peat and feedback the hard touch), and select the peat at the corresponding depth according to the research purpose as a sample point;

[0024] 3. Plane off the frozen ice layer on the peat surface of the sample point, select a 20cm×20cm square area as the pre-sampling area, cut vertically downwards along the square sideline with a saw, until the permafrost layer, after sawing all four sides, get a 20cm ×20cm×h peat core;

[0025] 4. Dig a deep pit larger than 20c...

specific Embodiment approach 2

[0029] Embodiment 2: This embodiment differs from Embodiment 1 in Step 1 when the freezing depth of the peat surface layer is 10 cm. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0030] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 3, an iron pick is used to plan off the frozen ice layer on the peat surface of the sample point. Others are the same as those in the first or second embodiment.

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Abstract

The invention provides a method for collecting a peat column core of a peat land in winter and relates to a collection method of a deposited column core of the peat land. According to the method, the technical problem that the deposited column core of the peat land is difficult to collect by virtue of an existing method is solved. The method comprises the following steps: (1) setting the collection time of the peat column core in early winter; (2) selecting a sample point; (3) digging a peat column core; (4) taking out the peat column core; (5) taking out peat in a permanent frozen layer by virtue of a frozen earth sampling device; (6) layering the peat column core in each 1cm; and (7) sequentially adding the layered peat column cores into zip-lock bags, and numbering the zip-lock bags. The method has the beneficial effects that a peat surface layer is not disturbed according to the characteristics of seasons; the moisture content in the peat land in winter is relatively low, so that the peat is unlikely to be compacted when people carries out sampling on the peat land, and the completeness of the sampled column core is relatively good; the sample column core is in a slightly frozen state, thereby being beneficial to fine layering; and the whole sampling method is simple and rapid, sampling tools are relatively light and convenient, the cost can be greatly saved, and the sampling efficiency is improved.

Description

technical field [0001] The invention relates to a method for collecting peatland sediment cores, in particular to a method for collecting peat cores in mid-high latitude seasonal freeze-thaw regions. Background technique [0002] Peatland is a site where the surface is often over-wet or has a thin layer of water, and wet-loving or swampy plants grow on it, and there is no less than 30cm of peat accumulation (Chaixiu, 1990). Due to its unique formation reasons and physical and chemical properties, peatlands can well record the history of past climate and environmental changes, and the in situ self-deposition mode of peat ensures that the peat deposition sequence is not as easy to be disturbed as the lake sequence (Chambers and Charman , 2004), so peatland sediment cores are good geological archives for studying past vegetation succession, global change, and historical peat deposition processes. [0003] In most peatlands, it is very difficult to take out a complete peat colu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/08
CPCG01N1/08
Inventor 刘汉向王国平马露莎韩冬雪
Owner NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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