Saline Soil Improvement Technology
The total amount of soluble salts in the finger-till layer exceeds 0.1%, the degree of alkalization is greater than 5%, and the alkaline spot area is greater than 15% of the cultivated area, which affects the salinization of cultivated land. Main technical measures: 1. Water conservancy improvement. Equipped with a regional drainage project, the treatment of tailless rivers, so that there is a way out of salt and alkali, to achieve the purpose of regional desalination. 2. Fertilize the soil, increase organic fertilizer, and turn green manure. Apply organic fertilizer (organic matter content >8%) 45-60 cubic meters per hectare. 3, chemical improvement. About 15 tons of gypsum is applied per hectare, and once applied as a base fertilizer, it can also be combined with the actual local implementation of the improvement of soil alkali spots and grassland alkali spots. 4, land and soil improvement. In the heavy alkali spot, the base spot was deepened by 40 cm and backfilled with guest black soil. 5, pressure sand improved. For soils with less salinity, 50-70 cubic meters of sand are pulled per hectare and incorporated into the plough layer to prevent back-salt. 6, improved rice breeding. Develop paddy fields where there are sufficient water sources, and use alkali for rice. The annual improvement indicators for the main obstacles to the soil tillage layer after treatment and improvement should be: 1. The salt content should be reduced by more than 10% before the improvement; 2. The alkalinity should be reduced by more than 5% before the improvement.