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Leafy vegetables: Fast-growing vegetables mainly made of fresh leaves, petioles or tender stems, such as cabbage, green vegetables, leeks, spinach and celery. The fertilization method of this kind of vegetables should be based on topdressing, and the fertilizer should be based on quick-acting nitrogen fertilizer. Generally, after the seedling period and every time a product is harvested, the fertilizer is applied once to promote the rapid growth of the leaves of the plant. Apply 8 kg to 10 kg of urea per acre or 500 kg of decomposed manure and urine, and apply it to plants or plants to facilitate the absorption and utilization of the plants as soon as possible.
Rhizome vegetables: vegetables that are made from fat, straight roots, such as radish, root celery, and root mustard. The fertilization method of this kind of vegetables should be based on base fertilizer and early topdressing, and a small amount of available nitrogen and potassium fertilizer should be added, and the topdressing should be applied quickly at the seedling stage or after planting. The first application of urea is 4 kg - 6 kg or 300 kg - 400 kg of excrement, which promotes early plant growth. Then, before the vegetables enter the vigorous growth period, apply 6 kg-8 kg of phosphorus and potassium fertilizer per acre to promote high yield of the plants. At this time, spraying 1%-2% of the urea aqueous solution outside the roots once or twice (every 5 days - 7 days) can also extend the function of the leaves without premature aging.
Fruit and vegetable vegetables: Vegetables that have a long growing season and are to be flowered, such as solanaceous fruits, beans and melons. The vegetables require more nitrogen, phosphorus and potassium fertilizers. The fertilization should be based on the base fertilizer and the whole process of topdressing. The nutrients are mainly nitrogen, phosphorus and potassium. Fertilization is carried out based on the principle of base fertilizer, early fattening and fruiting weight during the fruiting period. Immediately after each harvest of fruit, a quick-acting nitrogen fertilizer is applied to promote the rapid formation and expansion of the lower jaw fruit. If the anti-falling hormone, Baoguoling, cytokinin, etc. are sprayed at the same time, the yield increase effect will be better.
Pay attention to the following points when fertilizing vegetables:
1. Ammonium sulfate cannot be applied repeatedly. In acid soil or alkaline vegetable fields, if the ammonium sulfate is applied repeatedly, the acidic soil will become more acidic, and the alkaline soil will be squashed, which will lead to poor growth of vegetables and a decrease in yield.
2. It is not advisable to apply excessive calcium. The application of a large amount of superphosphate in the vegetable field will seriously affect the growth and development of vegetables, making the vegetables easy to dry, premature aging, poor growth, reduced yield and poor quality. It is better to apply 15kg to 20kg of calcium phosphate.
3. It is not advisable to use water to apply ammonium bicarbonate. Ammonium bicarbonate is extremely unstable and volatile. When applying ammonium bicarbonate in vegetable fields, whether it is base fertilizer or top dressing, deep application should be carried out in the case of wet vegetable fields, and soil should be covered immediately after application.
Fertilization of vegetables should be based on vegetables
There are many kinds of vegetables, but they can be summarized into three categories: leafy vegetables, root vegetables and fruits and vegetables. Different types of vegetables have different fertilizer characteristics; even the same vegetables have different fertilizer characteristics at different growth stages. In order to improve the effect of fertilization, it should be done according to the dishes.
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