Impact of soil degradation on food security?

Soil degradation, the relative reduction of nutrients, the low yield capacity of the land, so that the same area of land can support the population is reduced, so the impact of soil degradation on food production is fatal, and then affects the normal life of human beings, and even life.

Quite simply, if degraded agriculture is affected, it will naturally lead to no grain harvest, affecting food security.

Soil degradation leads to a decrease in nutrients in the soil, which in turn leads to a decrease in food production and, in turn, food prices**. When over-seeding causes land compaction, food crops can also be contaminated when used in improper amounts or when harmful pesticides are applied.

Soil degradation reduces the nutrients in the soil, and the soil is fundamental to food, just like the relationship between the foundation and the house, and if the foundation is not stable, the house is not safe, and the soil is degraded and the food is not safe.

Correct

Soil salinization is a kind of soil quality deterioration, abnormal drought or excessive fertilization in agriculture will allow salt to accumulate on the surface of the soil, resulting in plant roots can not absorb nutrients normally, further resulting in reduced food yield, imbalance of soil ecosystems, salinized ecosystems may never recover.

Improvement measures for soil salinization

1. Chemical improvement measures.

Chemical improvement measures are the method of improving saline soil through the application of chemical amendments and mineral fertilizers. Commonly used chemical amendments include organic or inorganic fertilizers, mineral fertilizers, calcium sulfite, desulfurization gypsum, phosphogypsum, ferrous sulfate, polymer amendments and soil comprehensive amendments. The principle is to improve the physical and chemical properties of the soil through acid-base neutralization, and to inhibit the occurrence of salinization by grinding type.

2. Biological improvement measures.

The aboveground growth part of the plant has a shading effect, which can reduce the evaporation of soil moisture, reduce the rate of salt accumulation on the surface, plant salt absorption can reduce the soil salt content, plant roots interspersed in the soil can change the physical properties of the soil, promote soil desalination, and the biochemical effect of plant roots can also improve soil nutrients and chemical properties, and inhibit the occurrence of soil salinization.

Compared with physical and chemical improvement measures, biological measures are low-cost, environmentally friendly, and can produce economic benefits, which are quite popular among farmers.

3. Comprehensive improvement measures.

The physical measures are effective, but the amount of engineering is large, the cost of Xiangyou is high, it is not long-lasting, and it is limited by water resources, it is not easy to promote chemical measures to achieve quick results, but if it is used improperly, it is easy to cause secondary pollution to the environment, and a large amount of water is needed to wash after the application of the amendment, and the application is difficult and the economic cost is expensive, and the biological measures can reduce the soil salinity, but can not completely solve the problem of salinization.

Soil salinization is one of the manifestations of soil quality deterioration, abnormal drought or excessive fertilization in agriculture will allow salt to accumulate on the surface of the soil, resulting in plant roots unable to absorb nutrients normally, further resulting in reduced food yields, imbalance of soil ecosystems, and salinized ecosystems may never recover.