What are the principles of vegetable crop rotation? Key points explained in detail

At present, continuous cropping obstacles have become an important problem in vegetable production, especially in greenhouses, where a single crop is planted and it is difficult to avoid replanting obstacles, which affects yield and quality. Therefore, crop rotation must be implemented to achieve high yield and high quality. However, not all vegetables can be rotated. Below, let's take a look at the principles and key points of vegetable crop rotation with the editor.

I. Benefits of vegetable crop rotation

Because different vegetables absorb different nutrients and have different absorption capacities, crop rotation can effectively and fully utilize soil nutrients, which can reduce fertilizer appetite, lower soil pollution, and ensure vegetable quality. As for pests and diseases, each type of vegetable has its own specific pests and diseases. If the same vegetable is planted repeatedly, these pests and diseases will occur repeatedly. Crop rotation greatly reduces this possibility; when pests and diseases cannot find a host to survive on, they will move away or die. In addition, it can also effectively suppress weed growth. Weeds generally grow alongside vegetables and also secrete harmful substances that pollute the soil, destroy biological enzymes in the soil, and disrupt vegetable growth. Planting the same crop in the same period will aggravate this harm, while reasonable crop rotation will greatly reduce the field weed population.

II. Principles of vegetable crop rotation

1. Vegetables of the same family or same type cannot be continuously cropped. Such vegetables generally can infect each other with pests and diseases, and the nutrients required for crop growth and development are also similar, which is unfavorable to both soil and crops. For example, the common solanaceous vegetables, cucurbits, and alliums cannot be continuously cropped with each other.

2. Vegetables with different root distribution or root depths can be continuously cropped. The purpose is to balance nutrients in different soil layers. Common deep-rooted vegetables include solanaceous vegetables, while shallow-rooted vegetables include leafy vegetables. They can be continuously cropped with each other and can maintain balanced nutrients in the soil layer.

3. When the secretions of different crops have mutually promoting effects, continuous cropping them can effectively prevent the accumulation of soil-borne pathogens. For example, scallions, ginger, and garlic crops can secrete a sterilizing substance.

III. Key points of crop rotation

1. Rotation of different vegetables

Vegetables of the same family will have the same pests and diseases. Rotating vegetables of different families can make pathogens lose their hosts or change their living environment, thereby reducing or eliminating pests and diseases.

2. Rotation based on different nutrient absorption and different root distribution

Carry out crop rotation according to the degree of soil nutrient absorption by vegetables and the different depths of root distribution. This can make full use of soil nutrients and reduce fertilizer costs.

3. Pay attention to the effects of soil pH and fertilizer

After planting cabbage and potatoes, soil acidity increases, while after planting corn and pumpkins, soil acidity decreases. Planting onions, which are relatively sensitive to acidity, as seedlings and after pumpkins can achieve higher yields.

  The above is an introduction to the principles and key points of vegetable crop rotation. We hope it can help you. To learn more related knowledge, please follow us.