Through the analysis of the above problems, it is known that almost all physiological diseases have a great relationship with the cultivation and management of greenhouse soil and vegetable farmers. Therefore, to prevent physiological diseases, it is necessary to start from the basics and improve the soil. To increase soil permeability and provide a good growth environment for vegetable growth, vegetable farmers can start from the following two aspects:
First, the supply of nutrients should be comprehensive.
Soil nutrients are “on demandâ€. Due to the short growth cycle and high multi-cropping index, greenhouse vegetables have a large amount of fertilization, and by soil testing and fertilization, according to soil testing results, what is missing in the soil, so that purposeful fertilization can greatly reduce the amount of fertilizer and thus enhance Soil fertility (reducing the degree of salinization, improving the physical and chemical properties of the soil); reducing fertilizer waste and environmental pollution.
Vegetable nutrients are “on demandâ€. According to the fertilizer requirement of the vegetables to be used, the tomato is taken as an example. The tomato seedlings mainly absorb nitrogen fertilizer. The demand for nitrogen, phosphorus and potassium in the early stage of flowering is close to 5..2..3, and the result is changed at the peak. It is 3.6..1.4..5, so the tomato should pay attention to the application of nitrogen fertilizer before flowering. After the result, it should pay attention to the application of potassium fertilizer.
Second, functional fertilizers are indispensable.
Among the fertilizers used in the fruit-bearing period of vegetables, functional fertilizers, such as chitin, alginic acid, and microbial agents, are second only to the large amount of elemental water-soluble fertilizers. These functional fertilizers can be applied and sprayed, and have the functions of improving soil, stimulating rooting and rooting of vegetables, and improving root resistance. Adherence to application can achieve soil conservation, improve soil permeability, increase soil beneficial bacteria and avoid The effect of premature aging in the late roots.
In the cloudy day when the light is weak, the leaves can not perform photosynthesis well. In addition to applying functional fertilizer, the foliar fertilizer should be sprayed in time to improve the absorption capacity of the leaves. For example, foliar supplementation of iron-containing manganese-containing trace element fertilizer has the effect of promoting photosynthesis of plants, and can prevent the appearance of yellowing symptoms of leaves; supplementing boron-containing fertilizer can promote flower bud differentiation of plants and prevent flowering and unreality. The phenomenon.
Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone
Tetanus Toxoid Vaccine,Toxoid Vaccine,Hep B Immune Globulin,Immunoglobulin Injections
FOSHAN PHARMA CO., LTD. , https://www.fspharmamedicine.com