Saline-alkali land is poorly drained or the drainage system is not perfect, resulting in increasing salinity year after year, which is not conducive to yield increase. The winter season is an advantageous season for reconstructing paddy fields in saline-alkali lands, mainly focusing on several aspects.
First, increase the application of organic fertilizer to scrape salt and alkali on the surface of paddy fields, then increase the application of organic fertilizer, and take straw to return soil and other methods to increase the acidity of the soil.
Second, the reform of the soil and soil shall adopt black soil, sand and alkali, and sediment and alkali pressure. Should be depending on the degree of salinity, generally 20-30 cubic meters per acre of sand is more appropriate. The specific amount of sediment is heavy alkali soil and soil with a high degree of viscous, with 25-30 cubic meters of sand per acre; lighter people use 20-25 cubic meters of sand per acre. If more than 30 cubic meters per mu, the texture of the soil will be loose, it is difficult to maintain water and fertilizer. The choice of sand material should be that coarse sand is better than fine sand, black sand is better than yellow sand, and yellow sand is better than coal ash.
Third, to remove alkalescent saline-alkaline paddy fields, there are accumulated salt into a piece of saline-alkali soil, so that the presentation of caustic soda soil, the caustic soda soil should be dug out, and then replaced with soil and sandy soil of non-alkaline soil.
Fourth, increase the depth of the drainage ditch deep ditch deep and deep, it is best to be about 1.0 meters, the ditch should be several levels of sound, the ditch should be small, the best 50 meters apart, easy to discharge the soil and surface saline.
5. Incorporating silt into the river. During the winter, the ice is scoured to excavate the silt near the shore of the river. This part of the silt absorbs much of the sun's heat, and has a certain amount of organic matter. It has a high degree of rottenness and is a rare acidic organic fertilizer. It is incorporated into saline soil land. , can play a good role in the transformation of saline-alkali land.
6. The surface of paddy field in saline-alkali soil in the entire field shall be leveled and the better, it is conducive to alkaline alkali-removal. In order to more accurately flatten the field surface, the level of the field can be leveled by means of a level gauge, and the height of the field can be reduced to ensure the quality of the leveling field.
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