Method and device for extracting soil dissolved nitrogen
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A technology for dissolving nitrogen and soil solution, which is applied in the device for extracting soil dissolved nitrogen and the field of extracting soil dissolved nitrogen, can solve the problems of low comparability of analysis and determination of soil samples, and achieve stable and reliable data results
Active Publication Date: 2015-08-12
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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Problems solved by technology
Aiming at the high heterogeneity and uncertainty of dissolved nitrogen content and composition (inorganic nitrogen, organic nitrogen components, etc.) -A soil soluble nitrogen extraction device and measurement method based on dark constant temperature cultivation-high-speed centrifugation, which overcomes the problems that the volume of soil solution is too small for analysis and measurement under natural conditions, and the comparability of soil samples with different temporal and spatial distributions is not strong.
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Embodiment 1
[0035] A method for extracting soil soluble nitrogen, the steps of which are:
[0036] A. Soil sample collection: Before soil sample collection, at least the following similar tools and materials should be prepared, three ring knives (made of steel, volume 100 cm 3 ); ring knife handle; metal hammer; engineer shovel; tape measure; pocket knife; seal bag; label paper; marker pen; GPS navigator;
[0037] When sampling, the soil under the representative forest vegetation type was selected in the research area as the research object. According to the typical sampling method, sampling points were selected along different altitudes to determine the sampling points of the vertical soil profile. When sampling, first record the soil texture information and vegetation distribution according to the soil occurrence level, then remove the litter on the ground and dig out the soil profile. The depth of the sampling profile is 90 or 100 or 110 cm, every 9 or 10 or 11 cm layer, a total of 9 or...
Embodiment 2
[0045] A device for extracting soil soluble nitrogen, which consists of a polypropylene bottle cap 1, a polypropylene bottle body 2, an acrylic cloth bag 3, a filter partition 4, and a polypropylene solution collection box 5. It is characterized in that: the polypropylene bottle cap 1 and the polypropylene solution collection box 5 are connected with the polypropylene bottle body 2 through threads, the filter partition 4 has fine holes, the filter partition 4 is connected with the polypropylene bottle body 2, and the filter partition 4 and the polypropylene bottle body 2 are the same whole, and the acrylic fiber bag 3 is filled with soil samples and placed on the polypropylene bottle body 2.
[0046] A device for extracting soil soluble nitrogen has the following characteristics:
[0047] 1) The specifications of the device (centrifuge bottle) are designed according to the size of the 500 mL angular rotor of the centrifuge. Its overall height is 130-140 mm, its diameter is 70-...
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Abstract
The invention discloses a method and device for extracting soil dissolved nitrogen. The method comprises the following steps: A, collecting soil samples, namely recording morphological characteristic information such as soil colors, structures, textures, consistence and new growth bodies according to soil genetic horizon, placing the samples into a closed plastic bag, putting into a refrigerator, and keeping the samples in a dark place; B, culturing soil, namely bringing cutting ring samples back to a laboratory, developing the measurement of field water capacity values of the soil, placing the samples into a constant temperature and humidity incubator, and culturing in the dark place; C, centrifuging the samples, namely taking out the soil samples, completely transferring the samples to an acrylic cloth bag, sealing the bag opening, putting into a polypropylene centrifuge bottle, tightly screwing a bottle cover, and treating in an ultra-high-speed refrigeration centrifuge to obtain a soil solution; D, sub-packaging and storing the solution; and E, performing analytic determination, wherein a polypropylene bottle cover and a polypropylene solution collecting box are connected with a polypropylene bottle body by virtue of screw threads, and a filtration separation plate is connected with the polypropylene bottle body. The method disclosed by the invention is feasible, is simple and convenient to operate, wide in applicability, stable and reliable in measured data results, high in accuracy and good in repeatability, and ensures that the composition and content of different soil dissolved nitrogen can be accurately measured.
Description
technical field [0001] The invention belongs to the technical field of multiple disciplines such as soil science, ecology, plant nutrition and environmental science, and more specifically relates to a method for extracting soil soluble nitrogen, and also relates to a device for extracting soil soluble nitrogen, which is suitable for scientific research Institutes and relevant units conduct indoor testing and analysis of soil dissolved nitrogen content, properties and other physical and chemical indicators in the solution. Background technique [0002] Soil dissolved nitrogen (including inorganic nitrogen, organic nitrogen components, etc.) is an important component of soil nitrogen in ecosystems and plays an important role in the material cycle of ecosystems. The variability in the difference in dissolved nitrogen obtained from the field by extraction of soil solutions mainly depends on the different extraction methods. In the past, the extraction method of soil dissolved n...
Claims
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Application Information
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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
Inventor 彭佩钦赖婧丁咸庆
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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