Can saline alkali land be improved and utilized, and how can saline alkali land improve the soil?

After the improvement of saline-alkali land, it can be well utilized; The root cause of the formation of saline-alkali soil is the poor water condition, so in the early stage of improvement, the focus should be on improving the soil water condition. Generally, it is carried out in several steps, first of all, salt discharge, salt washing, and soil salt content reduction; replanting salinity-tolerant plants to fertilize the soil; Finally plant the crop. Specifically, there are several improvement measures:

Water conservancy improvement: Establish a sound drainage and irrigation system, separate irrigation and drainage, strengthen water management, strictly control groundwater level, and continuously leach and remove salt from the soil through irrigation and washing, flood diversion and siltation.

Agricultural improvement: improve soil composition and structure, enhance soil infiltration performance, and accelerate salt leaching through deep tillage, land leveling, filling of guest soil, grass covering, siltation, sand covering, and organic fertilizer application.

Biological improvement: planting and turning green manure forage, straw returning to the field, applying bacterial fertilizer, planting salt-tolerant plants, afforestation, etc., to improve soil fertility, improve soil structure, improve farmland microclimate, reduce surface water evaporation, and inhibit salt return.

Chemical improvement: apply gypsum, alum and other amendments to alkaline soil, alkalized soil, soda salt soil, etc., reduce or eliminate soil alkalinity, and improve soil physical and chemical properties. All kinds of measures should be used in a comprehensive manner, and more importantly, they should be adapted to local conditions in order to achieve the expected results.

Yes, acid-base neutralization is used to improve the quality of saline-alkali soil.

Yes, there are ways to improve saline-alkali soil.

1. Drainage. 2. Irrigation and salt washing 3. Planting rice.

1. Chemical improvement:

Chemical modification of saline-alkali land.

Chemical improvement mainly refers to the addition of chemical substances to the soil to achieve the purpose of reducing soil pH, alkalinization and improving soil structure.

The main chemical amendments include gypsum and phosphogypsum.

Desulfurization gypsum, sulfur, humic acid.

Furfural residue and other substances. A large number of studies have proved that the combination of chemical improvement and other improvement measures can achieve extremely significant improvement effects in severely saline-alkali land.

2. Physical improvement.

Physical improvement can destroy soil capillary action by leveling the land, external soil, sand compression, soil loosening, field uplifting, etc.

Prevents further accumulation of salt on the surface. The large amount of open soil engineering, high cost and uneconomical cost are important reasons restricting its popularization and application.

3. Improvement of biology.

The soil of biologically improved saline-alkali land is barren and poorly fertile. Therefore, in the process of transformation, planting paddy fields and salt-tolerant crops to increase soil organic matter content is an important measure to improve salinity.

4. Improvement of water conservancy projects.

According to the law of "water-salt movement", the improvement of hydraulic engineering can prevent resalinization through underground infiltration pipe drainage, combined with ditches and deep wells.

Hazards of saline-alkali land:

1. Endanger the growth of crops and hinder the development of agricultural production.

The content of soil organic matter was relatively reduced. Soil salinization.

It inhibited the growth process of forage grass and the accumulation process of soil organic matter, which made the content of soil organic matter relatively low, and affected the physical and chemical properties of soil.

2. Soil solution directly poisons crop cells.

Due to the high concentration of saline soil solution and high osmotic pressure.

It reduces the ability of crops to absorb water and nutrients, and also reduces the ability of plant roots to selectively absorb nutrients.

So a large number of ions enter the body, and nutrients and ion absorption are reduced or absorbed by nutrients, disrupting the normal ion balance.

In the body, interfere with normal metabolic functions, damage to crops, protein synthesis and hydrolysis, due to the accumulation of ammonia and soluble salt ions in the body, produce ionic toxicity, endanger the growth and development of crops, and even death.

3. Insufficient crop growth causes seedlings, yield reduction, and death.

According to general statistics, there is no shortage of seedlings for crops in non-saline-alkali land, and the yield is normal. Seedlings in lightly salinized soil decreased by 10 20 (average 15), seedlings in medium salinized soil decreased by 20 50 (average 35), and seedlings in heavily salinized soil decreased by 50 80 (average 65). Salinized soils can only survive on their own and are not harvested.

According to the planting area of salinized surface in irrigation areas and the current crop planting ratio, it is roughly estimated that the annual crop loss in each irrigation area of agricultural district 1 is 44 million kilograms, about 500 million yuan, and the planting loss caused by salinity is 700 million yuan, accounting for 26 percent of the total agricultural output value.

The above content refers to: People's Daily Online Methods and measures for saline-alkali land improvement.

The above content reference: Encyclopedia Saline-alkali land.

1. Before planting seedlings, the general greenhouse will be stuffy shed, mainly to eliminate harmful bacteria, but at the same time, the beneficial bacteria are also eliminated, so at this time, if we apply organic fertilizer, if we do not supplement the beneficial bacteria, the organic fertilizer will not play a role, resulting in poor soil.

2. If the beneficial bacteria are applied alone, it will cause the beneficial bacteria to not survive, if it is used with manure organic fertilizer, because the beneficial bacteria have the characteristics of fixed-point reproduction, if the manure we use is not good, it will cause the beneficial bacteria to not play a role.

Therefore, for the use of manure organic fertilizer, it is recommended that you choose to use biological bacteria to ferment good, such as sheep manure organic fertilizer, sheep manure organic fertilizer fermented by biological bacteria, applied to the soil can not only solve the problem of element antagonism, but also supplement the soil with beneficial bacteria and quickly provide nutrients for soil and plants through the decomposition of sheep manure by beneficial bacteria, and improve the soil well.

Soil salinization is serious, in addition to reasonable fertilization, we must use the organic fertilizer fermented by biological bacteria well, so that the soil will be used better and better, and the choice of manure is very important.

1. Deep ploughing and improvement, this is a very simple method, the saline-alkali land that needs to be improved is deeply cultivated, and the laughing branches should be deeply cultivated for about 30-40 cm. The requirement is that there are no large clods in the land, and the soil is as fine as possible. When deep ploughing, it should be carried out vertically and horizontally many times as much as possible, and the depth of deep ploughing and the fineness of the soil should be satisfied.

Touch and sensitive. 2. Biological improvement, you can plant some salt-tolerant plants in saline-alkali land, such as Yueji, wolfberry, white wax and so on. When planting, you can apply some fungus fertilizer, which can improve the fertility of the land, so as to reduce the evaporation of water, which can also have a good effect. Conceal Zen.

3. To improve the field, a system should be established to separate irrigation and drainage energy, and the water level at the bottom should be well controlled. The soil is watered, soaked for about two days, drained, repeated two or three times, and then dried. At this time, check whether there are salt crystals in the soil, and if so, you should continue to soak in water.

1. Deep ploughing and improvement: deep ploughing of saline-alkali land for 30-40 cm, the soil should be as fine as possible, and it should be carried out vertically and horizontally for many times.

2. Biological improvement: You can plant salt-tolerant plants in the land, such as yueji, wolfberry, white wax, etc.

3. Improvement of soaking fields: establish a good irrigation and drainage system, soak and dry after irrigation, and soak again if there are salt crystals.