Simple and fast desalting method 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 also one of the main reasons for crop yield reduction. The area of ​​saline-alkali 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 national usable land area, mainly concentrated in the northwest, north, northeast and coastal areas. The salinized area of ​​cultivated land in my country reaches 9.209×106 hm2, accounting for 6.62% of the national cultivated land area (National Soil Census Office, 1998). With the expansion of agricultural irrigation areas and the further advancement of facility agriculture, soil secondary salinization will become more serious. In the current serious shortage of cultivated land in our country, developing salin...

Examples

Embodiment Construction

[0013] A simple method for rapid desalination of sandy heavy saline soil, comprising the following steps:

[0014] (1) Leveling of saline-alkali land and layout of drainage ditches: For tidal flats that have been reclaimed in the coastal areas of Jiangsu (choose sandy heavy saline soil in coastal tidal flats of Jiangsu as the implementation object, with a salt content above 10g / kg), the length is 500-600m, and the width is 50m. - Complete the supporting construction of the ditches and roads in a piece of 60m, and arrange the fields in a north-south direction; build temporary hair canals and furrows in the fields, and use ridges to divide the land between the canals and ditches into several grid fields. The length is 100m, and the drainage ditch is excavated according to the width of 4-5m in the grid field; after the land is leveled, the internal height difference of the dry farming area is within 30-50cm, and the local undulating height difference is 10-15cm; the internal heigh...

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 also one of the main reasons for crop yield reduction. The area of ​​saline-alkali 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 national usable land area, mainly concentrated in the northwest, north, northeast and coastal areas. The salinized area of ​​cultivated land in my country reaches 9.209×106 hm2, accounting for 6.62% of the national cultivated land area (National Soil Census Office, 1998). With the expansion of agricultural irrigation areas and the further advancement of facility agriculture, soil secondary salinization will become more serious. In the current serious shortage of cultivated land in our country, developing salin...

Examples

Embodiment Construction

[0013] A simple method for rapid desalination of sandy heavy saline soil, comprising the following steps:

[0014] (1) Leveling of saline-alkali land and layout of drainage ditches: For tidal flats that have been reclaimed in the coastal areas of Jiangsu (choose sandy heavy saline soil in coastal tidal flats of Jiangsu as the implementation object, with a salt content above 10g / kg), the length is 500-600m, and the width is 50m. - Complete the supporting construction of the ditches and roads in a piece of 60m, and arrange the fields in a north-south direction; build temporary hair canals and furrows in the fields, and use ridges to divide the land between the canals and ditches into several grid fields. The length is 100m, and the drainage ditch is excavated according to the width of 4-5m in the grid field; after the land is leveled, the internal height difference of the dry farming area is within 30-50cm, and the local undulating height difference is 10-15cm; the internal heigh...