Water saving saline land soil improvement method

Abstract

The invention discloses a water saving saline land soil improvement method comprising the following steps: 1, soil detection, sampling the soil and detecting soil salt content index; 2, applying improvement fertilizer; 3, applying improvement liquid; 4, doing a second time soil sampling detection 25-40days after the said steps are finished, if basic conditions of plant growth are not reached, continue doing step 2 and 3 until reaching soil plantation qualified standard; 5, planting crops and spraying liquid mulch film. The method applies improvement fertilizer to increase organic matter, NPK and trace element content, to increase soil water retention and permeability, and to increase soil granule compositions; the method applies improvement liquid so as to accelerate salt elimination speed, thus reducing soil PH value, accelerating beneficial microbe breeding, and promoting crop germination and root prosperity; after the crop is sowed, the liquid state mulch film can be sprayed so as to provide water retention effect, thus preventing moisture evaporation.

Description

technical field [0001] The invention relates to a soil improvement method for "water-saving" saline-alkali land, and belongs to the technical field of soil improvement. Background technique [0002] With the gradual advancement of economic development and coastal development, more and more newly reclaimed land in coastal areas, but all of them are saline-alkali land, with a maximum salt content of 0.5% or higher, unable to grow crops and produce economic value; at the same time , Freshwater resources in coastal areas are very scarce, and seawater is regularly discharged from rivers due to mariculture, so river water cannot be used for salt washing, resulting in slow progress in agricultural improvement of saline-alkali land and greatly increased costs. [0003] At present, the commonly used improvement method is salt washing. Drainage pipes are installed at the bottom 70 cm of the soil to be improved, and water is irrigated into the saline-alkali land to dissolve the soil sa...

AI Technical Summary

Problems solved by technology

[0004] 1. To use the above soil improvement methods, it is necessary to carry out drainage pipe infrastructure work on the farmland before planting crops, and to regularly apply chemical agents to achieve the purpose of improvement, and the cost is high, reaching 10,000 / mu;

[0005] 2. The soil improvement cycle of common method improvement technology is long, generally about 2 years. If the salt is not washed continuously, the soil will return to salt again, which requires a long period of conditioning;

[0006] 3. The demand for fresh water is large, and it is necessary to regularly test the salt content of the soil. When there is salt return, the salt content of the soil will increase again, and it is necessary to wash the salt again, which will consume fresh water resources, and after use The salt content of fresh water increases and cannot be reused;

[0007] 4. Due to the use of chemical methods for soil improvement by conventional technology, it causes secondary pollution of the soil and damages the rational indicators of the soil