How to apply fertilizer scientifically in the critical period of vegetable fertilization in spring

Spring is the key time for vegetable growth. Good fertilization can ensure good vegetable growth and a good harvest in the later stage. So how to apply fertilizer scientifically? Here science to promote agriculture to take advantage of this issue to share with you some high-yield vegetable fertilization methods, I hope it will be helpful to you.

1. Legume vegetables

We all know that the roots of legume vegetables have rhizobium, and rhizobium has the role of nitrogen fixation, so legume vegetables need less nitrogen fertilizer than other vegetables. However, in the growth of legume vegetables, the role of rhizobia in the early stage is not very obvious, because the growth of rhizobium is not mature and has little effect at this time. Therefore, it is necessary to apply sufficient base fertilizer in the soil, which is more conducive to the initial growth of legume vegetables. Organic fertilizer can be applied to the land according to the soil condition, and the organic fertilizer must be mature thoroughly, otherwise it will easily lead to root aging. In addition, legume vegetables need less nitrogen fertilizer in the growth process, but more potash fertilizer, and need the right amount of phosphate fertilizer to promote the flowering of legume vegetables and grow beans. So pay attention to the addition of plant ash and calcium phosphate in the process of applying base fertilizer. Generally, about 100 kg of plant ash and 20 kg of calcium phosphate are applied per mu of land. When legume vegetables grow fast, pay attention to topdressing in time, usually once every ten days, and urea and potassium oxide are generally used to promote flowering and pods.

2. Leafy vegetables

Leafy vegetables should be the most common vegetables we usually eat, such as Chinese cabbage, leek, spinach and so on. The root system of leafy vegetables is relatively shallow, so the nutrients needed for growth can only be obtained from the shallow soil, which requires growers to fertilize in time to ensure the growth of vegetables. Before planting, we also need to increase the soil fertility, apply sufficient base fertilizer, the base fertilizer generally uses organic fertilizer, the use of organic fertilizer is determined according to soil fertility, generally need about two tons of organic fertilizer per mu, in addition, about 100 jin of plant ash. During the growth of leafy vegetables, there is a large demand for nitrogen and potash fertilizer, generally adding urea every other crop, and the general dosage is about ten kilograms per mu.

3. Melons, fruits and vegetables

Fruits and vegetables need more fertilizer during the growth period than the first two. Fruits and vegetables are commonly used in tomatoes, eggplant, chili peppers and wax gourd. Nitrogen, phosphorus, potassium, calcium and magnesium fertilizers that need to be washed during the growth process. The basic fertilizer is similar to the above-mentioned fertilization methods. As the flower bud differentiation of melon and fruit vegetables is earlier, it is necessary to supplement nitrogen and phosphorus fertilizer in time to prevent the delay of flower bud differentiation. Generally speaking, melon and fruit vegetables need topdressing three times during the growing period, one is budding fertilizer, one is fruit fertilizer, one is fruit fertilizer, and usually it is necessary to supplement foliar fertilizer according to the growth status of vegetables.

4. Rhizome vegetables

Root vegetables such as potatoes, radishes, sugar beets, etc., root vegetables in the process of growing potash demand is more. Fertilization is mainly a combination of base fertilizer and topdressing, and topdressing pays more attention to early topdressing. It should be noted that if nitrogen fertilizer is applied in the process of fertilization, it is easy to lead to exuberant leaf growth and affect rhizome growth. The time of topdressing should be carried out after the root vegetables were planted, and about five kilograms of urea per mu should be applied to promote the leaf growth of the pillar. In the initial stage of rhizome formation, the application of phosphorus and potassium fertilizer is about 7 kg per mu to promote rhizome growth, prevent excess leaf growth and affect rhizome nutrient absorption. Spray 1% urea water and fertilizer on the leaves of root vegetables and spray them twice.

In addition to the above fertilization points, the fertilization process also needs to be combined with soil fertility, local climate, vegetable growth habits, fertilizer fertility and other comprehensive conditions to carry out scientific and reasonable fertilization.

The above questions about fertilization come from developing agriculture through science. I hope it will be helpful to you.