A method and device for short-term determination of soil potassium leaching amount

Abstract

The invention belongs to the technical field of soil measurement and discloses a method and device for short-term measurement of soil potassium leaching amount. Through the establishment of soil containers, soil packing, corn planting, sample collection and testing, and leaching amount determination, Calculation and other steps to achieve short-term determination of soil potassium leaching amount; a sample collection device for short-term determination of soil potassium leaching amount. The organic glass column includes a filtrate collection tank, a tripod and a vertical compartment root box. The filtrate collection The tank is placed under the plexiglass column, and all the leaching solution in the collection tank is transferred to the solution to be tested. The cross section of the tripod is an equilateral triangle, and the height of the tripod is 15cm. The plexiglass column is formed into a vertical compartment root box by laying a nylon net. The present invention tests the linear correlation between the potassium content in the collection tank leaching solution and the calculated potassium leaching amount through the calculation formula and linear regression equation of the potassium leaching amount, so as to monitor and evaluate the leaching of soil potassium. Provide scientific data.

Description

technical field [0001] The invention belongs to the technical field of soil measurement, and in particular relates to a method and a device for short-term determination of soil potassium leaching amount. It is also suitable for degraded soil monitoring and rapid evaluation of soil improvement effects. Background technique [0002] Soil potassium is an important nutrient element necessary for plant growth, and has an important impact on the growth and yield of crops. Potassium exists in soil in various forms such as water-soluble potassium, exchangeable potassium, non-exchangeable potassium, and mineral potassium. Only water-soluble potassium and exchangeable potassium can be directly absorbed and utilized by plants, and soil potassium accounts for the vast majority. Most non-exchangeable potassium and mineral potassium cannot be used directly. Therefore, in order to meet the needs of crops for potassium, potassium fertilizers are widely applied in the soil plow layer. How...

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Problems solved by technology

However, the above-mentioned methods are not all experiments set up for the leaching amount of soil potassium. Therefore, in the study of soil potassium leaching amount, the above-mentioned methods do not comprehensively consider the diversity of potassium in the soil (including water-soluble potassium, exchangeable potassium, non-exchangeable potassium, and mineral potassium), and the regularity of conversion of potassium in various soil potassium occurrence forms, etc., and other element-specific chemical properties. It just provides us with a possibility to obtain the amount of potassium leached by calculation

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