A device for simulating the migration and transformation of soil water and fertilizer under different plow layer structures

Abstract

A device that simulates soil water and fertilizer migration and transformation laws under different tillage layer structures belongs to the field of soil monitoring technology. It includes a plexiglass column, a base, a closed cover, a leach solution extraction device, a data acquisition device, a soil water collection device and a gas sampling device. The base is placed under the plexiglass column and is buried in the soil of the field environment together with the plexiglass column. , the top of the organic glass column is higher than the ground, and the liquid collecting bottle is built into the base. The liquid collecting bottle is connected to the leach hole at the bottom of the organic glass column through conduit I. The liquid collecting bottle and the leach solution extraction device are connected through conduit II. The top of the organic glass column is set The closed cover is provided with sensing lines connected to the data collection device and collection conduits connected to the soil water collection device at different heights of the organic glass column, and the sampling device is connected to the closed cover. The invention can simulate the migration and transformation of soil moisture and nutrients and crop growth under different tillage layer structures, quantitatively evaluate the advantages and disadvantages of different tillage layer structures, and provide a basis for rational construction of tillage layers.

Description

technical field [0001] The invention belongs to the technical field of soil monitoring, and in particular relates to an outdoor soil column device for simulating the migration and conversion laws of soil moisture and nutrients and crop growth under different plow layer structures. Background technique [0002] A good tillage layer structure plays an important role in increasing grain production and ensuring national food security. In the late 1970s, with the introduction of foreign rotary tillage equipment and the gradual promotion of rotary tillage, the farming efficiency was greatly improved. Compared with plowing and harrowing, rotary tillage has good soil breaking performance and adaptability. Strong, high operating efficiency advantages. However, the long-term use of rotary tillage has gradually exposed some problems. The current rotary tillage depth is generally about 15cm, which is 8-10cm shallower than the past mechanical plowing depth, resulting in shallower plowin...

AI Technical Summary

Problems solved by technology

[0005] 1. Most of the current soil column experiments are carried out in an ideal environment without crops, but the existence of crops plays an important role in the migration and transformation of water and nutrients. An ecosystem without crops is not a complete ecosystem

[0006] 2. The traditional soil column test cannot achieve all-round monitoring of nutrient leaching, crop absorption, greenhouse gas emissions, etc.

[0007] 3. The traditional soil column device cannot dynamically monitor the dynamic changes of soil moisture at different levels for a long time and extract the leaching solution at different soil levels

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