Soil testing and formula fertilization technology is a new technology promoted in agricultural production today. This technology is applied to fertilize according to soil nutrient content for different types of crops and different growth stages, which greatly improves the yield of crops and saves production costs. Therefore, today Xiaobian talks about vegetable soil testing and formula fertilization technology, as follows.
First, the growth characteristics of vegetables and fertilization methods
1. Vegetables are generally short-term nutritional crops, which can be re-broadcast with many types of vegetables (such as Chinese cabbage, radish, melon, etc.), so the amount of fertilizer is large. Some fast-growing vegetables (such as Chinese cabbage, season radish, leeks, etc.) have a much shorter growth period, and the nutrients absorbed per unit time are much more than the vegetables with longer growth period. Therefore, more quick-acting fertilizer should be applied during the cultivation process.
2. The amount of soil nutrients absorbed by the vegetables depends largely on the development of the root system. Generally, roots are deep and wide, vegetables with large roots (such as pumpkin, melon, etc.) and vegetables with larger roots (such as beets, carrots, eggplant, etc.) absorb more nutrients and grow on thin soil. Fertilization can be rough. Vegetables with poor root development, shallow distribution, and poor nutrient absorption (such as cucumber, onion, lettuce, etc.) must be planted on fertile soil and fertilized finely.
3. The requirements for soil nutrient conditions in different growth stages of vegetables are different. The root system is not developed at the seedling stage, so it is necessary to apply some thin quick-acting fertilizers. In the vegetative growth period and the nutrient demand in the fruiting period, sufficient fertilizer is required.
4, according to the characteristics of fast vegetable growth, weak root system and high yield, combined with the application of organic fertilizer and chemical fertilizer, not only can provide a variety of nutrients for vegetables, but also help to improve yield and improve quality.
Second, the classification and fertilization techniques of different vegetables
1. Leafy leafy vegetables mainly include cabbage, green vegetables, spinach, leeks, etc. The topdressing fertilizer is mainly nitrogenous fertilizer, and phosphorus and potassium fertilizers need to be added during the growth period. If the supply of nitrogen fertilizer is insufficient during the whole growth period, the plant will be short and the spring will be easy to convulsion.
2, fruit and vegetable fruits and vegetables including melons, solanaceous fruits and beans, generally seedlings need more nitrogen fertilizer, but excessive application of nitrogen fertilizer will prolong the flowering results, leading to falling flowers and fruit. In the later stage of growth, phosphorus and potassium fertilizers should be added to control the amount of nitrogen fertilizer.
3, root vegetables root vegetables mainly include radishes, carrots, vines, etc., in the early stage of growth, more nitrogen fertilizer should be applied to promote the formation of large green leaves. Potassium fertilizer is applied in the middle and late growth stages, and the amount of nitrogen fertilizer is appropriately controlled to promote the transport of leaf assimilation substances into the roots.
Third, the facility cultivation and more organic fertilizer
When cultivating vegetables in a protected area, it is necessary to fully consider the aftereffect of the former sorghum fertilizer, apply more organic fertilizers, and appropriately apply less fertilizer to avoid the loss of vegetables due to salt accumulation.
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