Vegetable rotation should pay attention to the problem

Rotating several kinds of vegetables with different properties according to a certain number of years on the same plot is an effective measure to rationally use soil fertility, reduce pests and diseases, improve quality, and increase labor productivity. The following points should be noted when implementing a reasonable rotation of vegetables:

1. Note that different vegetables have different requirements for nutrients. Make full use of soil nutrients. Different vegetables have different absorption of nutrients, such as cabbage, spinach and other leafy vegetables need more nitrogen fertilizer, fruits and vegetables such as melons, tomatoes, peppers need more phosphorus, potato, yam and other roots and stems need more potassium. The rotation of vegetables with more nitrogen, more phosphorus, and more potassium, or the rotation of deep-rooted vegetables with shallow-rooted vegetables can make full use of the nutrients in the soil. Generally, leafy vegetables with more nitrogen are preferred. Soybeans with more phosphorus need to be arranged. Cucumbers, celery, and spinach that are fast-absorbing and fattened are the best varieties of tomatoes, eggplants, and peppers that respond well to organic fertilizers.

2. Pay attention to the difference in the depth of the roots of different vegetables. Arrangement of deep-rooted root vegetables, solanaceous fruit, beans, melons (except cucumbers), and shallow rooted leafy vegetables, onions and garlics are used for rotation, and fertilizers at different levels in the soil can be utilized.

3. Note that different vegetables have different effects on soil fertility. The leguminous vegetables can increase soil organic matter content and increase soil fertility. Long-term seeding of fast-growing leafy vegetables that require more nitrogen will cause the nutrients in the soil to lose balance and the soil fertility will decline, leading to nutritional deficiencies in some vegetables. Therefore, it is necessary to properly grow and grow the vegetables with a short growing period and a short growing period, requiring more fertilizer and less fertilizer.

4. Note that different vegetables have different requirements for soil pH. Potatoes, kale, etc. will increase soil acidity, and corn, squash, etc. will reduce the acidity of the soil. Therefore, after planting corn and pumpkin, high-yield onions sensitive to acidity can be obtained, and potato and cabbage can be replanted to be acid-sensitive. Onions are cut back.

5. Pay attention to the different degrees of occurrence of pests and diseases in different environments. The same pests and diseases occur in the same family of vegetables. The rotation of vegetables in different subjects can cause the pathogen to lose its host or change its living environment and achieve the purpose of reducing or eliminating pests and diseases. Such as cucumber wilt, locust, etc., can also invade other melon vegetables, if you change the non-cucurbit vegetables, will reduce or eliminate the effect of pests; such as onion, garlic after the harvest of cabbage, can make large The soft rot of Chinese cabbage has been significantly reduced; grain and vegetable rotations and flooded and dry crop rotations have had significant effects on the control of soil infectious diseases.

6. Note that different vegetables have different inhibitory effects on weeds. Some vegetables that grow rapidly or have high cultivation density, long growth period, and large leaf coverage on the ground, such as melons, cabbages, beans, potatoes, etc., have obvious inhibitory effects on weeds; and carrots, celery, onions, etc. Slow seedlings, small leafy vegetables, easy to breed weeds. The rotation of these vegetables can significantly reduce grass damage.