The latest causes and control methods of continuous cropping of chives

Friends who grow vegetables know that a crop cannot be continuously planted for a long time in a piece of land, otherwise there will be continuous cropping hazards, as well as chives, which are common in our lives. The light continuous cropping of chives affects the yield due to insufficient growth of the trees, and the heavy continuous cropping of cilantro is caused by a large area or even a basic failure. How to prevent it? Let's get to know each other.

1. Reasons for continuous cropping obstacle of coriander

1. Soil acidification

The yield of chives is high, up to 6000-10000 kg per mu, and a large amount of yield also takes away base elements from the soil, such as calcium, magnesium, potassium, etc. This leads to excessive consumption of trace elements in the soil, which makes the soil acidified. In addition, a large amount of acid fertilizer was applied, and with the increase of cultivation years, soil acid accumulated and cultured, resulting in soil acidification. Excessive application of nitrogen fertilizer and compound fertilizer can also easily cause nitrification and acidification of nitrogen, resulting in increased soil acidity.

2. Soil salinization

Similar to soil, soil salinization is mainly caused by fertilizer and water management. Excessive application of chemical fertilizer causes coriander to be unable to absorb, salt will accumulate on the surface of soil layer, making shallot appear physiological thirst phenomenon. After the application of human and animal feces and urine, a large amount of ammonia volatilized and decomposed, salt substances remained in the soil surface, watering frequently, soil moisture was relatively high, resulting in salt accumulation on the surface. Watering too often causes soil to harden into lumps, salt to rise to the tillage layer with water, and salt to accumulate as water evaporates.

3. Deficiency

The fertilizer is single, only chemical fertilizer is applied, and the application of other elements and trace elements is ignored. Over time, the accumulation of nitrogen and phosphorus elements in the soil is excessive, and the proportion of trace elements is seriously out of balance, which will inhibit the absorption of other elements by coriander, cause imbalance of nutrition ratio, form deficiency disorder, and directly affect the quality and yield of chives.

4. Soil-borne diseases

The soil-borne diseases of coriander mainly include downy mildew, gray downy mildew, leaf spot, purple spot, leaf blight, root rot, verticillium wilt, etc. The pathogens of these diseases continue to accumulate in the soil, and the longer the continuous cropping time, the more serious the disease.

II. Control methods

1. Crop rotation

The onion soil acidification, salinization and soil-borne diseases can be rotated with rice for 2 years, and then planted with coriander for 2-3 years, which can play an excellent role in acid washing, salt washing and disease control, and reduce the occurrence degree of soil acidification, salinization and soil-borne diseases.

2. Prevention and control of diseases

Disinfection treatment of soil before planting can kill most soil-borne bacteria. When diseases are found, they should be prevented and treated in time. Different pesticides should be sprayed according to specific diseases.

The above is the introduction of the causes and prevention methods of continuous cropping obstacles of chives. I hope it can help you. If you want to know more about related knowledge, please pay attention to us.