How to choose organic fertilizer?

Soil organic matter generally refers to the carbon-containing organic compounds that exist in various forms in the soil. It refers to the substances in the soil that are derived from life. It is the substance in the soil other than minerals. It is the most active part of the soil and the basis of soil fertility. , is one of the important indicators to measure soil fertility. So, how to choose organic fertilizer?

There are many types of raw materials for organic fertilizers, and the quality is also uneven, and the effects vary greatly. Humic acid, urban sludge, paper mill mud, lignin, waste from biochemical pharmaceutical factories, and cakes are commonly used. Humic acid raw materials have a certain improvement effect on the soil and root system, but they have a certain effect on the beneficial bacteria in the soil. The supporting effect is minimal, so it is average in fertilizer quality. However, due to the high content of heavy metals in urban sludge and paper mill sludge, if there is any omission in the process of treatment, it will cause artificial pollution of crops and cause loss of income.

When fermenting organic fertilizer, there are many raw materials available, such as animal manure, soybean meal, peanut cake, crop straw and so on. When choosing commercial organic fertilizers, it is best to choose organic fertilizers made of bean cakes, peanut cakes, fulvic acid, seaweed, etc., which contain many useful substances and have good fertilizer effects.

The process of making organic fertilizer is to dry these raw materials first, sterilize and kill insects, then add bacteria to decompose, add nitrogen, phosphorus and potassium, and finally dry and pack. A good organic fertilizer has a relatively high degree of decomposing, and the fully decomposed organic fertilizer looks yellowish brown or dark brown.

The finished organic fertilizers are granular, columnar and powdery, requiring uniform shape and size. Put it in water, there will be little residue after dissolving, and it will be fully decomposed. If the particle size is uneven and the shape is different, there will be precipitated organic fertilizer after dissolution, which will also affect the use effect.

When selecting organic fertilizers, fully decomposed is the basis. It can be distinguished by the color and smell of the fertilizer, and then it depends on the organic matter content in the organic fertilizer, as well as amino acids and humic acids.

Organic matter is very important to soil, and timely and appropriate supplement of soil organic matter is very important to maintain soil fertility and physical and chemical properties.