Collection system capable of realizing slope cropland surface runoff and interflow quantitative research

Abstract

The invention provides a collection system capable of realizing slope cropland surface runoff and interflow quantitative research. The system comprises a plurality of U-shaped strip-shaped collectiontanks buried in a soil body along the downhill direction, the length of the U-shaped strip-shaped collection tanks is consistent with the length of a slope surface, and permeable layers are arranged in the U-shaped strip-shaped collection tanks. The strip-shaped collection tanks are respectively buried in the bottoms of the plowing layer, the subsoil layer and the parent material layer, the strip-shaped collection tanks buried in the bottoms of the plowing layer, the subsoil layer and the parent material layer are arranged in a staggered manner, and projections of the strip-shaped collection tanks are not overlapped. The system also comprises a surface runoff collecting ditch and the interflow collecting ditch transversely arranged at the bottom end of the slope. The strip-shaped collecting grooves consistent with the slope surface in length are buried in the bottom of each layer in a staggered mode to collect interflow, transverse interflow and vertical interflow in a soil body can becollected at the same time, errors caused by different soil properties of the whole slope surface are reduced, the quadrat amount is increased, and the result accuracy is improved. By adopting the system, the rule of loss of each nutrient element on the ground surface and underground can be analyzed more accurately.

Description

technical field [0001] The invention relates to the technical field of field monitoring devices, in particular to a collection system applied to purple soil sloping farmland, which can realize research on surface runoff and flow in soil of sloping farmland. Background technique [0002] my country is a country with a large population, and grain production occupies an important position in the development of agricultural production. In terms of increasing the output per unit area, chemical fertilizers play a decisive role. my country's chemical fertilizer production and usage are both the first in the world, and the annual chemical fertilizer usage is 35% of the world's. Although my country uses a large amount of chemical fertilizers, the utilization efficiency of nutrients such as nitrogen and phosphorus in agriculture is low, and a large amount of nutrients are lost due to the erosion of rainwater runoff and leaching and seepage in the soil. At present, the seepage plate c...

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Problems solved by technology

Although my country uses a large amount of chemical fertilizers, the utilization efficiency of agricultural nitrogen, phosphorus and other nutrient elements is low, and a large amount of nutrient elements are lost due to the erosion of rainwater runoff and leaching and seepage in the soil.

Currently, the seepage plate collection method is often used to collect soil midflow. This method is fixed-point collection, with large accidental errors, and the sample size is small, and the test accuracy is not high. It is difficult to achieve accurate quantitative research on soil midflow.

Moreover, the current collection of soil midflow is mainly focused on overall collection or only a small number of runoff samples are taken for rough quantitative analysis, and it is difficult to achieve long-term observation and flow collection of soil midflow by rainfall events.

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