Causes of salinization

1, natural factors

This factor is not artificially controlled, but is mainly determined by nature. When the groundwater level rises for some reasons, or when the water level is high in rainy season, the probability of soil salinization will increase, especially in areas near the sea, which will be more serious. Secondly, some relatively closed terrain will be aggravated by the inability to discharge salt.

2. Human factors

The reason is mainly caused by unreasonable irrigation, such as perennial flooding, which makes the groundwater level rise after infiltration and leads to soil salinization. Some people say that a little water during irrigation can have such great consequences? In fact, it took many years to form, not to say that soil salinization occurred in one or two years. Secondly, under the same conditions, sewage irrigation will also accelerate soil salinization, which is artificial, that is to say, it can be avoided.

In addition, excessive use of pesticides and fertilizers all the year round will also aggravate soil salinization to some extent. Finally, the single crop and the imbalance of soil nutrients also have an impact.

Understand the causes of soil salinization, and then talk about the harm of soil salinization. Only by letting some people know its harm will we start from action.

Second, the harm of soil salinization

1, affecting growth

If crops are planted in saline-alkaline land, we will find that the lack of elements is very serious, and other symptoms, such as weak growth, yellowing, wilting and weak roots, are very common. From the outside, the crops are lifeless, and when it is serious, the roots die and the whole plant dies.

Step 2 reduce production

The yield of crops growing on saline soil will be affected to some extent, because crops can not be absorbed and metabolized normally on it. If it is not too serious, the reduction in production is certain. If the land is particularly salinized, the crops will be cut off directly.

3. Abandon farmland for farming

When salinization is serious and it is no longer suitable for crop growth, it can only be forced to return farmland to abandon farming. This phenomenon is not without it. Once this happens, we can imagine how much damage our lives will be.

4. Living environment

The above three points are from the aspect of agriculture. If it is big, it will directly endanger our living environment. When the land is all salinized and no longer suitable for living, a series of subsequent problems can't be imagined. Don't think it's far from us. In fact, if you don't pay attention to it, it may be in the near future.