With the progress of society and the increasingly developed science and technology, there has been a lot of pollution in the environment in which we live, and the land we live in is now devastated. Therefore, we must take measures to carry out soil remediation and control soil pollution. Soil problems will become an important part of the environmental protection cause in the future.
Then there are problems. How do we solve these problems? As a farmer, we should understand the countermeasures. There are four general plans:
One is the rational use of chemical fertilizers;
The second is to increase the amount of organic fertilizer input;
The third is to supplement beneficial bacteria (microbial agents);
The fourth is to use soil conditioners appropriately.
1. Organic fertilizer
The main indicator of soil fertility is the content of soil organic matter. Once the soil organic matter is lacking, the beneficial microbial flora of the soil will be out of balance. The microorganisms promote the decomposition and transformation of soil organic matter and nutrient elements, and organic matter provides nutrients for microorganisms and a suitable environment for living.
Compared with the organic fertilizer that requires a large amount of input, microbial bacteria can play a role in soil. Microbial bacteria can activate soil organic and inorganic nutrients, provide fertilizer utilization, improve soil aggregate structure, degrade heavy metal residues, and inhibit soil-borne diseases. , The metabolites of microorganisms contain a variety of natural plant hormones and amino acids and other beneficial substances that can promote the healthy growth of plants. However, for microorganisms to function better, they must be established on the basis of sufficient soil organic nutrients.
3, Soil conditioner
With the occurrence of various problems such as soil acidification and secondary salinization, especially in the economically efficient greenhouse vegetable and fruit tree areas, growers are more troubled by soil problems. In recent years, soil conditioners have also begun in these areas. As the temperature rises, the main effects of soil conditioners on the soil are loose soil, improving soil aggregate structure, retaining water and fertilizer, and alleviating soil acidification and salinization.
The classification of soil conditioners is roughly divided into four categories:
1. Using natural ore as raw material:
Such as potash feldspar, limestone, dolomite, medical stone, zeolite, phosphate rock powder, etc.;
2. Using industrial by-products, waste residues, or waste liquids as raw materials:
Such as alkali residue, monosodium glutamate fermentation tailing liquid, steel slag, etc.;
3. Using shells as raw materials:
Oyster shells are mostly calcined at high temperatures.
4. Using animal hair as raw material:
Animal hair chelation, etc. There are also some that have not been registered but are widely used in addition, such as chemical products such as polyacrylamide (soil extract), and organic products such as humic acid and fulvic acid. It is worth advocating that humic acid product derived from mineral sources after activation has been widely used abroad. In some countries such as Europe and the United States, humic acid is classified as a biostimulant, which has good effects on soil restoration and stimulating crop growth.
More details of soil conditioner