A method for estimating the stoichiometric relationship between base ions and silicon weathering of soil mixed minerals

A technology of mixing minerals and ion content, which is applied in the field of soil weathering measurement relationship estimation, can solve the problems such as the difficulty in estimating the measurement relationship of silicon and base ions, and achieve the goals of broad application market and potential, strong elution ability, improved effect and accuracy Effect

Inactive Publication Date: 2017-07-28
INST OF SOIL SCI CHINESE ACAD OF SCI
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Problems solved by technology

Therefore, it is very difficult to estimate the stoichiometric relationship between silicon and base ions released by mineral weathering in nature.

Method used

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  • A method for estimating the stoichiometric relationship between base ions and silicon weathering of soil mixed minerals
  • A method for estimating the stoichiometric relationship between base ions and silicon weathering of soil mixed minerals
  • A method for estimating the stoichiometric relationship between base ions and silicon weathering of soil mixed minerals

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Embodiment 1

[0030] The first step is to accurately weigh 200g of air-dried soil samples, remove gravel, plant roots and other debris, and add them to a clean centrifuge bottle.

[0031](1.a): Soil sample air-drying process. Place the collected soil samples in a cool, dry, ventilated room without direct sunlight, spread them flat on a clean cool soil rack, plastic cloth or tarpaulin, and lay them in a thin layer for faster air-drying. When the soil sample reaches a semi-dry state, it is necessary to gently crush the large soil clods in the soil by hand to avoid the soil from forming hard lumps after the soil is completely air-dried and not easy to crush. In order to dry faster, the soil sample can be turned over. turn. At the same time, pick out the big grass roots in the soil to avoid crushing the big grass roots during rolling and making it more difficult to pick them out. Air-dried rooms are required to prevent acid, alkali and other gases, aerosols and dust pollution. When the soil ...

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Abstract

The invention relates to an estimation method of weathering measurement relationship between salt-based ions and silicon in soil mixed minerals. The estimation method comprises the following steps: adding weathered soil samples without sundries into a centrifugal bottle; adding an EDTA-ammonium acetate solution into the soil samples, and performing uniform stirring, sealing, and vibration in sequence; performing centrifugal filtration, collecting supernatant, and determining the content of salt-based ions in the supernatant; repeating the steps until the content of the salt-based ions in the collected supernatant is not changed any longer; washing redundant EDTA-ammonium acetate in soil with ammonium-free ethanol; adding an acid rain leaching solution into the soil samples of which salt bases are eluted, performing uniform stirring, vibration and centrifugation, performing filtration, collecting supernatant, and determining pH, the content of silicon and the content of the salt-based ions; every 6 days, repeating drip washing, calculating the acid rain leaching quantity of each salt-based ion, and the weathering measurement relationship between the salt-based ions and the silicon. According to the estimation method disclosed by the invention, a batch (Batch) method is adopted, so that the eluting capacity is powerful, and the eluting effects are good. According to the soil exchangeability salt-based elution method, the experiment effects and the precision are remarkably improved, and the soil exchangeability salt-based elution method has wide application prospects.

Description

technical field [0001] The invention belongs to a method for estimating the measurement relationship of soil weathering. Specifically, the exchangeable base ions adsorbed by soil colloids are eluted by the Batch method, and then the acid rain leaching experiment is carried out to estimate the base ions and the amount of silicon released when the soil mixed minerals are weathered, and then Enables accurate estimation of mineral weathering rates and soil acidification rates. Background technique [0002] The chemical weathering of soil minerals is the basis of soil formation, an important source of nutrients needed by plants, and a buffer of H in the soil. + indispensable process. Therefore, mineral weathering and the release rate of base ions are the basis for the estimation of soil formation rate and soil acidification rate, which is of great significance to the sustainable development of soil. However, mineral weathering is a slow process, and the field weathering rate is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 杨金玲张甘霖宋效东庄翔宇
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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