Point source infiltration water supply device for achieving concentration variation and water supply method of point source infiltration water supply device

Abstract

The invention discloses a point source infiltration water supply device for achieving concentration variation. The point source infiltration water supply device comprises a PLC, a Marriott bottle, a stirring tank, a constant-pressure tank and a soil tank, wherein the Marriott bottle, the stirring tank, the constant-pressure tank and the soil tank are sequentially communicated through guide tubes; the water outlet end of the Marriott bottle is higher than the water inlet end of the stirring tank; the water outlet end of the stirring tank and the water inlet end of the constant-pressure tank are at a same level; the water outlet end of the constant-pressure tank is higher than the water inlet end of the soil tank; valves are arranged on the guide tubes; a lifting rack is arranged at the bottom of the Marriott bottle; a stirring device is arranged inside the stirring tank; the lifting rack and the stirring device are electrically connected with the PLC. By adopting the point source infiltration water supply device, the water supply requirement of concentration variation can be met, gradient increase of gradient decrease of the concentration of a supplied solution can be achieved, point source infiltration tests of drip irrigation pressure differential fertilization or self-pressure fertilization can be facilitated, the device is stable and simple in structure and low in cost, and automatic control can be achieved.

Description

technical field [0001] The invention relates to the technical field of irrigation, in particular to a point source infiltration water supply device capable of realizing concentration changes and a water supply method thereof. Background technique [0002] As a new type of water-saving and efficient irrigation technology, irrigation technologies such as drip irrigation and membrane hole irrigation are being promoted and applied more and more in my country. Drip irrigation and film hole irrigation are essentially point source local irrigation methods, so point source infiltration test is one of the main contents to investigate the water movement mechanism of drip irrigation and film hole irrigation. With the development of water and fertilizer integration, scholars have more and more researches on the infiltration mechanism of water and fertilizer point sources. At present, the Martens jar combined with the soil tank is a classic device for point source infiltration tests, an...

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Problems solved by technology

However, these point source infiltration test devices still have some deficiencies, especially for the point source infiltration test research of drip irrigation pressure difference fertilization or self-pressure irrigation fertilization, because the concentration of the fertilizer solution will continue to decay in this case, the Marble bottle as The point source infiltration water supply device can no longer realize the change of solution concentration, which makes it difficult to carry out the point source infiltration soil tank test of drip irrigation pressure difference fertilization or self-pressure irrigation and fertilization. Therefore, it is necessary to develop a device that can realize the change of solution concentration. Point source infiltration water supply device, providing assistance for pressure difference fertilization or self-pressure fertilization point source infiltration test research of drip irrigation (film hole irrigation)

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