A Detailed Guide to the Latest Fertilization Methods and Precautions for Greenhouse Vegetables

Nowadays, vegetable cultivation mostly relies on greenhouses. Greenhouse vegetables can be brought to market earlier and can also be grown out of season, yielding greater profits. However, improper fertilization of greenhouse vegetables not only causes soil compaction and fertilizer damage, but also leads to excessive toxic substances in vegetables, harming human health. Therefore, fertilization of greenhouse vegetables must be done with great care. So how should greenhouse vegetables be fertilized? What should be noted? Let's take a look together.

1. Farmyard manure must be decomposed

Farmyard manure provides various elements and trace elements and can also increase soil organic matter, so it is widely used in the cultivation industry. When applying farmyard manure to greenhouse vegetables, it must be fully decomposed. If farmyard manure is applied directly without being fully decomposed, it contains large amounts of pathogens and insect eggs, which will spread with the fertilizer after application, and during the fermentation and decomposition process it will also produce large amounts of ammonia gas, burning the seedlings.

2. Fertilization must be scientific and reasonable

Generally, the entire fertilization method is divided into base fertilizer, topdressing and foliar fertilizer. Base fertilizer is generally applied one week before planting, mainly organic fertilizer and farmyard manure, and must be mixed evenly with the soil when applied. Topdressing is generally mainly quick-acting fertilizer to promote rapid vegetable growth, applied in furrows or holes 7-10 cm away from the plants, and the soil should be covered and watered promptly after topdressing. It should not directly touch the plants, so as to avoid fertilizer volatilization or burning the vegetables. Foliar fertilizer is generally applied during the peak nutrient demand period and the late growth stage, chosen on a cloudy day or in the evening, spraying the prepared fertilizer solution on the leaves so that the vegetables can absorb it.

3. Chemical fertilizer must be applied in appropriate amounts

Fertilizer in greenhouses is lost through watering. If too much chemical fertilizer is applied, it will cause the salt concentration in the soil to become too high, leading to soil salinization. Nitrogen fertilizer application should be controlled, phosphorus and potassium fertilizer should be increased, and at the same time the application of nitrate nitrogen fertilizer should be prohibited. In greenhouse management, ventilation time should be increased, management should be strengthened, the nitrate content should be reduced, and some trace element fertilizers should also be supplemented, which can improve soil structure and enhance vegetable quality.

4. Precautions

Trace element fertilizers must be applied in appropriate amounts. Trace elements are needed by vegetables in extremely small amounts, but their effect on vegetables is enormous, and they can greatly improve vegetable quality. Currently commonly used trace element fertilizers include boron, molybdenum, zinc and iron fertilizers. Trace element fertilizers are generally used as base fertilizer, and can also be used for seed dressing, seed soaking or foliar spraying. The dosage must be reasonable to avoid fertilizer damage. Making good use of plant growth regulators can play a role in increasing yield, but the timing and concentration of use must also be well controlled, otherwise it will not only fail to increase yield, but will also affect human health.

The above is an introduction to the fertilization methods and precautions for greenhouse vegetables. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.