Three-in-one cultivation method with desalination and planting integration for heavily saline soil in coastal beaches

Abstract

The invention provides a three-in-one cultivation method with desalination and planting integration for heavily saline soil in coastal beaches; with 20%. heavily saline soil serving as an example, salt in the saline soil is soaked out through fresh water by adopting a three-drying one-draining method, the water in which the salt of the saline soil is dissolved is discharged, and the heavily salinesoil is subjected to salt washing 5 times circularly so that the salt content of the heavily saline soil is decreased from 20%. to 6-7%.; the desalted soil is further desalted by adopting a water-soil rotary tillage method three times circularly so that the salt content of the soil is decreased from 6-7%. rapidly to about 3%.; the desalted soil is further desalted by adopting a sunning-soaking rotation method two times circularly, the desalting effect of upland field planting can be rapidly achieved, and the salt content of the soil layer with the depth of 0-20 cm is further decreased to 2%.and below; the method of the invention has high desalting speed and good desalting effect, allows saline-alkaline soil to be transformed to a degree suitable for planting common rice and wheat varieties within one year, and is suitable for desalting and planting in a beach heavily saline soil area.

Description

technical field [0001] The invention relates to the desalination and planting technology in heavy saline soil areas of tidal flats, in particular to a three-in-one deseeding integrated cultivation method for heavy saline soils in coastal tidal flats, which belongs to the technical field of heavy saline soil improvement. Background technique [0002] China has a total area of ​​tidal flat resources of 2,170,900 hectares. With the construction of "Fan Gong Dike" in the Song Dynasty, the scale of reclamation gradually expanded. During the Yuan and Ming Dynasties, the cause of reclamation further developed. Laodang has been released for reclamation one after another, and private reclamation has also appeared in Dongzao Dang of Fangongdi. At the beginning of the 20th century, tidal flat reclamation was advocated, and more than 70 salt reclamation and reclamation companies were established in the Lianghuai Salt Reclamation Area, setting off a large-scale reclamation and development...

AI Technical Summary

Problems solved by technology

[0002] China has a total area of ​​tidal flat resources of 2,170,900 hectares. With the construction of "Fan Gong Dike" in the Song Dynasty, the scale of reclamation gradually expanded. During the Yuan and Ming Dynasties, the cause of reclamation further developed. Laodang has been released for reclamation one after another, and private reclamation has also appeared in Dongzao Dang of Fangongdi. At the beginning of the 20th century, tidal flat reclamation was advocated, and more than 70 salt reclamation and reclamation companies were established in the Lianghuai Salt Reclamation Area, setting off a large-scale reclamation and development of tidal flats in modern times. After the founding of the People's Republic of China, the usual practice of using the heavily saline soil after reclamation is: first, freshwater aquaculture, which generally takes 5-10 years, and gradually desalination in the process of aquaculture; second, paddy field cultivation, mainly based on Rice is mainly planted, and freshwater irrigation is used to achieve the purpose of desalination and desalination, so that the soil is gradually desalinated, and finally salt-tolerant xerophyte crops can be planted. This cycle takes about 5 years; the third is dry field planting of salt-tolerant plants. It is mainly to plant salt-tolerant plants, such as quince, rapeseed and cotton, and further desalinate and optimize the soil structure during the planting process. This process also takes about 3 years; how to combine the above three steps into one, that is, " There is no public case of the three-in-one cultivation technique of plant removal and integration