What are the principles and key points to note for vegetable crop rotation?

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 continuous cropping obstacles, affecting yield and quality. Therefore, crop rotation must be implemented to achieve high yield and quality, but 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. In terms of 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 shift or die. In addition, it can also well suppress weed growth. Weeds generally grow alongside vegetables and also secrete harmful substances that pollute the soil, destroy biological enzymes in the soil, and damage vegetable growth. Continuous cropping of the same crop 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 the soil and the crops. For example, the commonly seen solanaceous fruits, cucurbits, and alliums cannot be continuously cropped with one another.

2. Vegetables with different root distribution or root depths can be continuously cropped. The purpose of this is to balance nutrients in different soil layers. Common deep-rooted vegetables include solanaceous fruits, while common shallow-rooted vegetables include leafy vegetables. These can be continuously cropped with one another, maintaining balanced nutrients in the soil layers.

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, onion, ginger, and garlic crops can secrete a bactericidal substance.

III. Key points of crop rotation

1. Rotate different vegetables

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

2. Rotate according to 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 to note for vegetable crop rotation. We hope it can help you. To learn more related knowledge, please follow us.