"Five to five look" in greenhouse vegetable fertilization
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Farmyard fertilizer should be decomposed. The application of farmyard manure in greenhouse vegetables should be fully decomposed. Because the unfertilized farmyard manure contains pathogens and eggs, the disease will be transmitted after the vegetables are applied. In addition, if the farmer's fertilizer is re-cooked in the shed, ammonia burning seedlings will be produced. Therefore, the farmyard manure should be fully decomposed and then applied.
Fertilization methods should be scientific and reasonable. The base fertilizer is preferably applied one week before the plant is planted and mixed evenly with the soil. Topdressing can be carried out at a distance of 7-10 cm from the plant or after the top dressing. After topdressing, it is necessary to cover the soil and water it in time. Avoid spreading the fertilizer directly on the ground or on the plant to prevent the fertilizer from volatilizing or burning the vegetable seedlings. The top dressing should be carried out in the peak period of vegetable fertilizer and in the late stage of vegetable growth. It should be carried out in the cloudy or evening. Try to spray the fertilizer on the back of the new leaves and leaves to facilitate the absorption of vegetables.
The amount of chemical fertilizer applied should be appropriate. The fertilizer in the shed is not easy to be lost. Excessive application of chemical fertilizers may cause the concentration of salt in the soil to increase, which may affect the normal growth of vegetables and the secondary salinization of the soil. Therefore, fertilization should be carried out before fertilization, and formula fertilization should be carried out, and blind application should not be carried out.
The application of micro-fertilizer should be appropriate. Although the demand for trace element fertilizers on vegetables is small, it has a great role in vegetable metabolism. Currently used micro-fertilizers include boron, molybdenum, zinc, iron fertilizer, and the like. Micro-fertilizer is used as a base fertilizer, and can also be used for seed dressing, soaking seeds or top dressing. The range between the amount of micro-fertilizer and the excess is relatively narrow, and the dosage must be accurate to avoid causing fat damage.
It is advisable to use a plant growth regulator method. The use of plant growth regulators will promote the production of vegetables. However, each type of regulator has certain conditions and scope in application. In particular, it is necessary to master the time and concentration of use, and it should not be sloppy, otherwise it will not achieve the effect of increasing the yield of vegetables.
Five look
Look at the types of vegetables to fertilize. The variety of nutrients required by different kinds of vegetables is different. The amount of nitrogen required by leafy vegetables is large, while the solanaceous fruits need a lot of phosphorus and potassium in addition to nitrogen. Eggplant, tomato and green pepper are all solanoids, but Tomato needs more potassium than eggplant and green pepper. The roots of the beans have a nitrogen fixation effect, and the nitrogen fertilizer can be appropriately applied.
See fertilization during the birth period. The different types of nutrients and nutrients in the same growth period of the same crop are not the same, and should be changed when fertilizing. Fruits and vegetables need little fertilizer in the seedling stage, but they are rich in nutrients. Therefore, the quality of the nutrient soil in the seedling stage is the key to cultivating strong seedlings, and the amount of fertilizer absorbed in the initial harvest period accounts for about 70% of the total growth period. Therefore, it is necessary to retake the mixed fertilizer once.
Look at the weather conditions and topdress. The utilization rate of fertilizer varies with changes in temperature, moisture, and light conditions. When the temperature is suitable for water and the light is sufficient, the utilization rate is high, otherwise the utilization rate is low. Therefore, when topdressing, it should be properly filled with water after topdressing or topdressing in the warm and sunny weather.
Look at the soil for fertilization. Sandy soil has poor fertility. If the amount of fertilizer applied is too large, it will cause nutrient loss. It is necessary to adopt a fertilization method that eats less meals. The viscous soil has good fertilizer-preserving ability. It can take one more appropriate fertilization, reduce the number of top dressings, and save labor. save time.
Look at the fertilizer and fertilize. Generally, agricultural fertilizer is used as the base fertilizer, while human feces and pig manure contain more nitrogen, which is suitable for leafy vegetable base fertilizer; poultry manure contains more phosphorus and potassium, and should be used as fruit and vegetable base fertilizer. Fertilizers and fertilizers should be applied in combination with nutrient content, such as stone and potassium sulfate. The base fertilizer and top dressing should also be matched in terms of nutrient type and content. For example, in the cultivation of tomato base fertilizer, the combination of nitrogen, phosphorus and potassium is suitable, lack of calcium, calcium fertilizer is added in topdressing, and calcium deficiency tomato is easy to get umbilical rot.