Vegetable Crop Rotation Techniques to Help You Achieve Stable and High Yields

Vegetables, like field crops, also benefit from proper crop rotation, which is an important part of vegetable cultivation. It refers to rotating the planting of predetermined vegetable species and sequences on the same plot of land within a certain number of years. This improves soil structure, increases soil fertility, reduces damage from pests, diseases and weeds, raises the multiple cropping index, ensures stable and high vegetable yields, and increases economic returns. The following basic crop rotation techniques should be mastered in cultivation.

1. Rotate vegetables that absorb different soil nutrients and have different root depths. For example, rotate leafy vegetables that consume more nitrogen fertilizer with root vegetables that consume more potassium fertilizer or fruit vegetables that consume more phosphorus fertilizer, and rotate deep-rooted solanaceous fruits, melons and beans with shallow-rooted leafy vegetables and alliums.

2. Rotate vegetables that do not transmit pests and diseases to each other, that is, change to planting vegetables of different families each year, such as rotating between Solanaceae and Poaceae, or between Poaceae and Liliaceae.

3. Legumes have root nodules that can enrich the soil, alliums have a certain sterilizing effect, and paddy fields can suppress dryland weeds. Rotating with the above crops can improve soil structure, increase fertility, and reduce damage from pests, diseases and weeds.

4. Pay attention to the different soil acidity and alkalinity requirements of different vegetables. For example, after cultivating cabbage and potatoes, soil acidity increases, so acid-sensitive onions and spinach should not be planted as the following crop; whereas after planting corn and pumpkin, soil acidity decreases, so spinach, onions and garlic can be arranged. Legume root nodules leave more acid in the soil, and continuous cropping often leads to reduced yields.

Generally speaking, leafy vegetables, green leafy vegetables, onions, chives and the like can be continuously cropped, but organic fertilizer should be applied in increased amounts. Potatoes, ginger, cucumbers and peppers need an interval of 2-3 years; tomatoes, melons, peas, and winter squash need an interval of 3-4 years; watermelons need an interval of 6-7 years.