Buried steam pipeline system used for improving saline-alkali soil and method for improving saline-alkali soil

Abstract

The invention discloses a buried steam pipeline system used for improving saline-alkali soil. The system comprises a steam boiler, a water pump, a main pipe and a drainage ditch, wherein the steam boiler, the water pump and the main pipe are arranged on one side of the surface of the saline-alkali soil; the drainage ditch is arranged on the other side of the saline-alkali soil; one end of the mainpipe is connected with an outlet of the steam boiler; a steam valve is arranged at the end part of the main pipe, which is connected with the steam boiler; the other end of the main pipe is connectedwith an outlet of the water pump; a water flow valve is arranged at the end part of the main pipe, which is connected with the water pump; the main pipe is downwards connected with a plurality of vertical pipes in the vertical direction; the vertical pipes extend downwards into the soil; the lower ends of the vertical pipes are connected with a plurality of horizontal pipes with holes; and the horizontal pipes with the holes extend slantingly and downwards into the drainage ditch. The system is combined with methods of irrigating for salt washing, adding a soil improver and planting saline-alkali tolerant plants for remedying the saline-alkali soil, so that the improvement effect of the saline-alkali soil is effectively improved. Therefore, the texture and the fertility of the soil are improved, and the system has certain economic benefits and can promote the construction and development of agriculture and forestry in saline-alkali regions.

Description

technical field [0001] The invention belongs to the technical field of soil remediation, and in particular relates to an underground steam pipeline system for improving saline-alkali soil and a method for improving saline-alkali soil. Background technique [0002] At present, saline-alkali soils are widely distributed in my country, among which there are nearly 13 million hectares of saline-alkali soils with potential for agricultural development and utilization, accounting for more than 10% of my country's arable land. At the same time, 670,000 hectares of secondary salinized soils were caused by improper irrigation in the existing cultivated land. At present, my country's land use area has reached the upper limit, and the focus of the development and utilization of reserve land resources should be the improvement and management of degraded land. The saline-alkali soil in my country is mostly in the arid and semi-arid zone, and the soil has not been polluted by man-made he...

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Problems solved by technology

Physical measures include irrigation and salt spraying, plastic film covering, etc. In China, the water conservancy improvement method "fresh water salt pressing, drainage washing salt" is mainly used. The "drainage-based" method can effectively reduce the salinity in the area, but the operation cost of the treatment technology is high. , and will cause serious waste of water resources, and even cause groundwater and downstream water pollution, chemical measures include the application of chemical modifiers, biological measures include the selection of salt-tolerant plants, etc.

Commonly used methods such as foreign soil replacement and hydraulic leaching in physical measures have the disadvantages of large basic investment and complex engineering; in biological measures, distant source hybridization and genetic engineering to cultivate salt-tolerant species require high technical requirements, large economic investment, and slow results. The cycle is long; the application of amendments commonly used in chemical measures has quick results and low investment. In recent years, it has been widely used in saline-alkali soil improvement and vegetation restoration, but it is easy to cause chemical residual pollution

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