Vegetable early spring seedling four attention

First, choose disease-free bed soil

The seedbed is selected in a place where the leeward is sunny and the terrain is high. It is best to use the fertile soil for the last 5 years without the seeds of the solanaceous fruits, melons and cruciferous vegetables. The soil is good for sandy soil, and the surface layer with a thickness of 13-17 cm should be selected. earth. Avoid using garden soil as bed soil. In order to prevent the soil from carrying bacteria, the bed soil can be disinfected, and there are many disinfection methods. Commonly used are: (1) carbendazim disinfection. Use 50% carbendazim WP 25-30g per 1000kg bed soil. When treating, firstly prepare carbendazim into an aqueous solution, then spray it on the bed soil, mix well and cover with plastic film, generally 2 - 3 days to kill a variety of pathogens such as blight in the soil. (2) Formalin disinfection. First, spray the formalin, water, and bed soil in a certain proportion, then pile up, cover the plastic film, and confuse the film for 2-3 days to promote the emission of the drug. This way, it can be used after 1-2 weeks. In addition, in order to prevent seed-borne bacteria, 50% carbendazim or 50% thiram double wettable powder can be used for seed dressing, the dosage is 0.3% of the seed amount.

Second, soaking seeds, germination

Soak seeds in warm water at 55 ° C for 15 minutes, stir constantly until the water temperature drops to about 30 ° C, then soak seeds and germination at room temperature. Different vegetables are soaked and germinated for different times. Under suitable conditions, cucumber should be 36-48 hours, cabbage and cabbage for 36 hours, eggplant 6-7 days, pepper 5-6 days, tomato 2-4 days, and zucchini 6-8 days. When germination, the seeds of cruciferous vegetables (such as cabbage, cabbage, radish, etc.) are small, and it is better to break the seed coat with radicle, and the solanaceous vegetables (such as eggplant, pepper, tomato, etc.) should not exceed the length of the seed; Seeds (such as cucumber, bitter gourd, melon, etc.) can be used to promote short buds, or buds can be raised to 1-2 cm.

Third, seedbed management

Before planting, pour the bottom of the water, soak the seeds evenly, see the seeds and then sprinkle some herbs, then cover the sunshade net or straw moisturizing to promote the whole seedlings, and finally cover the film for a few days, until the seedlings "dew buds." Keep the soil moist after sowing and before emergence. The temperature is controlled between 20 ° C and 35 ° C, and the relative humidity of the air is maintained at 85% - 90%. When the seedlings appear, "wearing caps" seedlings, you can spray water first. After the seed shells are hygroscopic, gently brush the seed shells with a brush. Watering is properly controlled throughout the seedbed period. When the soil topsoil is very dry, it can be watered at one time. Usually try to reduce the number of watering, so as not to grow up. Rationally increase the application of phosphate fertilizer to improve the cold resistance of the seedlings. Pay attention to ventilation and ventilation to prevent excessive humidity in the seedbed and harmful gas harm to vegetable seedlings. In the case of ensuring the temperature of the seedbed, the light should be increased as much as possible to make the seedling grow robust. Seedlings should be planted at an appropriate time to prevent the seedlings from being too late to cause damage to the roots. For aging seedlings, 0.2% spray Shibao or 300-500 times potassium dihydrogen phosphate is sprayed per square meter of seedbed to stimulate seedling growth.

Fourth, prevent disease

Seedling stage is prone to blight, rickets and so on. In the early stage of the disease, the diseased seedlings are first removed, and then sprayed in time to prevent spread. Commonly used agents are: copper ammonium mixture (using 2 parts of copper sulfate, adding 11 parts of ammonium carbonate, grinding and mixing, sealing after 24 hours) 400-500 times solution, 50% carbendazim 600 times solution, 75% Chlorothalonil or 70% diclofenac WP 600-800 times solution and a concentration of 0.1%-0.2% copper sulfate solution. In order to prevent the humidity of the seedbed from being too large after application, the wood ash or dry fine soil can be used to absorb moisture.

Handheld Glycohemoglobin HbA1c Analyzer

Hba1C Device,Diabetes Test,Glycohemoglobin Test,Glycosylated Hemoglobin Test

Wuxi BioHermes Bio & Medical Technology Co., Ltd. , https://www.biohermesglobal.com