Saline-sodic land reclamation and control method

Abstract

The invention relates to a saline-sodic land reclamation and control method. Wide and deep research is long developed on the reclamation of saline-sodic land at home and abroad, and more focuses on engineering measures than applies biological techniques; although achievement has been made, some insurmountable difficulties still exist. The saline-sodic land reclamation and control method comprises the following steps: bulk deep loosening, applying soil deep loosening agents and saline-sodic soil improvement agents to deep loosening soil, purposefully and proportionally applying biologically organic fertilizer according to the composition of soil detected by adopting a nutrient balance method and a nitrogen phosphorus and potassium proportioning method which both comprise the following steps: subtracting soil nutrient-supplying amount from the fertilizer requirement of target yield, supplementing the balance through fertilizing, hathpace ridge forming, draining water and controlling salt, planting green manure-saline alkali tolerant high-yielding grass crop jerusalem artichoke to thoroughly improve the soil.

Description

Technical field: [0001] The invention is a method for improving saline-alkali soil. Background technique: [0002] For a long time, extensive and in-depth research has been carried out on the improvement of saline-alkali land at home and abroad, mostly focusing on engineering measures and less application of biotechnology. Although some achievements have been made, there are some insurmountable difficulties: ①The engineering cost is expensive; ②Soil The improvement is effective but not sustainable; ③The nutrients in the soil are drained along with the salt after flushing with fresh water; ④Insufficient fresh water resources are difficult to meet the demand for salt suppression. A lot of manpower and material resources have also been invested. Although certain results have been achieved, the cost performance is not high, and it is difficult to promote it on a large scale. The causes of saline-alkali soil in different parts of the world are different, the soil nutrients are d...

AI Technical Summary

Problems solved by technology

[0002] For a long time, extensive and in-depth research has been carried out on the improvement of saline-alkali land at home and abroad, mostly focusing on engineering measures and less application of biotechnology. Although some achievements have been made, there are some insurmountable difficulties: ①The engineering cost is expensive; ②Soil The improvement is effective but not lasting; ③The nutrients in the soil are drained along with the salt after flushing with fresh water; ④Insufficient fresh water resources, it is difficult to meet the demand for pressing salt

A lot of manpower and material resources have also been invested. Although certain results have been achieved, the cost performance is not high, and it is difficult to promote on a large scale

The causes of saline-alkali soil in different parts of the world are different, the soil nutrients are different, and the topography, landform and climate environment are different. It is difficult to implement the control measures in one country or region in other countries or regions, and even if they are implemented, they will not achieve satisfactory results.