This technical specification stipulates the production environment, production technical requirements, pest control, and commodity seedling standards for cabbage seedlings. This standard applies to the large-scale seedlings of Cabbage in conservation areas such as sunlight greenhouses and arch shelters in the northern part of Hebei Province.
Second, the environment of origin
Select a site with convenient transportation, good ecological environment, good water quality, no toxic pollution source, and a comprehensive index of environmental factors as a production site. The site should be a site with high ground, convenient transportation and complete facilities such as hydropower.
Third, production technology requirements
(I) Nursery facilities and equipment
1. Nursery seedbed. The length of the seedbed depends on the span of the facility. The width is 2.2 meters. It is advisable to place 4 rows of standard nursery trays. The seedbeds are partitioned with 24 cm red bricks and two layers are laid for pedestrians to use.
2. Seedlings seedlings plate. Use a black plastic plug, size 54 cm 28 cm, size 105 or 128 holes.
3. Spray equipment. Installation of fixed micro-spray or artificial spray equipment, fixed micro-spraying water should completely cover the seedbed.
4. Cooling equipment. Use ventilation and 60 to 80 mesh shade nets to cool down.
5. Germination equipment. Select the incubator or artificial climate box can be.
(b) Equipment disinfection
1. Nursery greenhouse disinfection. With chlorothalonil aerosols, depending on the greenhouse area, it is best to continue to smoke twice.
2. Seedlings and bottom cloth disinfection. Re-use the seedling plate with 800 ~ 1000 times potassium permanganate solution soak for 30 minutes, rinse with water and use. The new seedling plate and bottom cloth need not be disinfected.
(3) Nursery Substrates and Their Preparation
Using the market formulated good nursery substrate or self-formulated, the market's existing matrix formula is mostly peat: perlite: vermiculite = 6:3:1, and the purchased substrate is added nitrogen:phosphorous:potassium=15:15 per cubic meter: 15 1 to 2 kg of compound fertilizer is crushed and added uniformly. The method of self-preparation is decomposed straw and decomposed livestock feces. The preparation ratio is straw, feces, vermiculite=7:2:1, and the effect is good.
(four) the plate
1. Pretreatment of the matrix. The day before the plate was placed, the substrate was poured on the plastic cloth while spraying water, while turning it, to reach the hands and clumping, and the floor was scattered. After the completion, the plastic muffler was tightly closed for 8 to 10 hours.
2. Install the plate. The substrate vessel is poured onto the plug tray, and the plate is pushed over the substrate to scrape the surface, scraping off the excess substrate, so that the matrix is ​​filled in each hole of the plug tray to achieve a smooth and consistent.
3. Pressure points. Each well-loaded seedling plate hole to the hole, the code height of 10 plates, with a board larger than the seedling plate on the top of the seedling plate, the downward force, the pressure point is 1/4 of the deep hole.
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