A Simple Method for Rapid Desalination of Sandy Heavy Saline Soil

Abstract

The invention discloses a simple and fast desalting method of sandy heavy saline soil. The simple and fast desalting method includes leveling saline-alkali soil; arranging draining canals, covering straws, cleaning ditches and the like. The simple and fast desalting method is characterized in that the soil is covered with wheat straws or barley straws, and the natural concentrated rainfall feature in the coastal area is fully utilized, thus the coastal sandy saline soil is fast desalted. The simple and fast desalting method is easy and convenient to operate, low in cost and high in application value and can be widely applied to fast desalting of the sandy saline soil in the coastal beaches of Jiangsu province, and therefore large-scale crop cultivation is facilitated to improve utilization potential of the beaches.

Description

Technical field [0001] The invention relates to a method for rapid desalination of sandy heavy saline soil. Background technique [0002] Salt stress is one of the main factors affecting plant growth and crop yield, and it is also one of the main reasons for crop yield reduction. The area of ​​saline-alkaline soil in the world is very large, accounting for 6.5% of the total area. The total area of ​​saline soil in my country is about 3.6×107 hm2, accounting for 4.88% of the available land area in the country, mainly distributed in the northwest, north, northeast and coastal areas. The salinized area of ​​cultivated land in my country reached 9.209×106 hm2, accounting for 6.62% of the national cultivated land area (National Soil Survey Office, 1998). With the expansion of agricultural irrigation areas and the further advancement of facility agriculture, secondary soil salinization will become more serious. In the current situation of serious shortage of arable land in our count...

AI Technical Summary

Problems solved by technology

Most of the measures adopted are farmland open channels or hidden pipes or shaft irrigation and drainage, etc. These technical measures consume a lot of water resources in the large-scale application and promotion, the project scale is large, the land occupation is large, the investment is large, and the maintenance workload is relatively large. Problems such as high operation and maintenance costs (Ministry of Water Resources. Technical Specifications for Farmland Drainage. Beijing: China Water Resources and Hydropower Press, 1999, 96-98)

In view of the shortage of water resources in my country and the large investment in some saline-alkali land control measures, it is difficult to promote and apply them on a large scale