Three-in-one deseeding integrated cultivation method in heavy saline soil on coastal beaches

Abstract

The invention provides a three-in-one deseeding integrated cultivation method for coastal heavy saline soil. Taking 20‰ heavy saline soil as an example, the "three dry and one row method" is used to soak the salt in the saline soil with fresh water, and then discharge the dissolved saline soil. Wash the heavy saline soil with medium saline water, and cycle it 5 times, so that the salt content of the heavy saline soil will drop from 20‰ to 6‑7‰; use the "water and soil rotary tillage method" to further desalinate the above desalinated soil , cycled 3 times, so that the salt content of the soil quickly dropped from 6-7‰ to about 3‰; the above-mentioned desalinated soil was further desalinated by using the "sun soaking and spinning method", and the cycle was repeated 2 times, which can quickly reach the level of dry field planting. The desalination effect further reduces the salt content of the soil layer with a depth of 0-20cm to below 2‰. This method has a fast desalination speed and a good desalination effect. Within one year, the saline-alkali land can be transformed to the extent that common rice and wheat varieties can be grown , suitable for desalination and planting in tidal flat heavy saline soil areas.

Description

Three-in-one deseeding integrated cultivation method of heavy saline soil along tidal flats technical field The present invention relates to desalination and the planting technology of tidal flat heavy saline soil area, relate in particular to a kind of coastal tidal flat heavy saline soil three The invention discloses an integrated cultivation method for deseeding and cultivation, belonging to the technical field of heavy saline soil improvement. Background technique [0002] The total area of ​​tidal flat resources in my country reaches 2.1709 million hectares. With the construction of "Fangong Dike" in the Song Dynasty, the scale of reclamation has gradually increased. Gradually expanded, during the Yuan and Ming dynasties, the reclamation business further developed. After the end of the Ming Dynasty, the pavilions and stoves of the Lianghuai Salt Fields continued to move eastward, and the old salt fields were old. Reclamation was successively released, and private re...

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