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Tillage erosion measurement magnetism tracer method

A measurement method and magnetic technology, applied in the direction of measuring devices, material magnetic variables, using electromagnetic means, etc., can solve the problems of time-consuming, labor-intensive, low measurement accuracy, difficult measurement operation, etc., to achieve high measurement accuracy and simple equipment , Determining the effect of rapid

Inactive Publication Date: 2009-12-16
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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Problems solved by technology

This method is to estimate the redistribution rate of soil by manually finding the redistribution position of small metal pieces or gravel after tillage, so it has the disadvantages of difficult measurement operation, time-consuming and labor-intensive measurement, and low measurement accuracy.

Method used

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  • Tillage erosion measurement magnetism tracer method
  • Tillage erosion measurement magnetism tracer method
  • Tillage erosion measurement magnetism tracer method

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Experimental program
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Embodiment Construction

[0022] First use the plywood to prepare the movable frame box according to the specifications described in step a), and the volume is 1.00×0.20×0.25m 3 ; and obtained calcined brick slag and cinder from brick kilns as magnetic tracers.

[0023] Select a slope with a slope of 25% and a slope length of 15m to measure the soil bulk density; excavate a soil pit with a length slightly greater than 1m, a width slightly greater than 0.2m, and a depth of 0.2m (plowing depth is planned to be 0.2m) in the area to be measured. The long side of the pit is parallel to the contour line of the slope, and the excavated soil is placed on a piece of oilcloth, and then the movable wooden frame box is put into the pit, so that the plank is exposed by 5cm so that it can be pulled out later. First remove the soil equivalent to the magnetic tracer on the oilcloth, then mix the magnetic tracer evenly with the excavated soil, and then backfill it in the box according to the original field soil density...

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Abstract

A tillage erosion measurement magnetism tracer method adopts a magnetism tracer agent to measure soil displacement on slope, which is caused by tillage, the displacement of soil towards low slope is calculated according to the redistribution of the tracer agent after tillage along the tillage path, and the tillage erosion rate is obtained by calculation according to the soil displacement. The invention has the characteristics of fast and convenient measurement and high measurement accuracy, and the invention carries out land evaluation aiming at reducing slop soil loss, protecting soil resource, maintaining soil productivity, reducing diffused pollution and the like, thus providing decision-making basis for land management.

Description

technical field [0001] The invention relates to a method for measuring soil erosion, in particular to a method for measuring soil displacement by using a magnetic tracer, thereby measuring the erosion rate of tillage. Background technique [0002] The main types of soil erosion in the world are hydraulic erosion, wind erosion and farming erosion. There are many measurement methods for the former two, such as runoff plot method for water erosion, artificial simulated rainfall method, isotope tracer method, etc.; wind tunnel experiment for wind erosion method, BSNE automatic wind erosion sediment collector method, etc. But for tillage erosion, due to the late discovery of tillage erosion, with only a history of more than ten years, its research is far less than that of water erosion and wind erosion. Correspondingly, the current determination methods are few and immature, and the only method is the distribution method of small metal pieces or gravels. This method is to estim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/72G01B7/02
Inventor 张建辉
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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