In the high-temperature period, the live growth of vegetables is not good, and pests and diseases are also susceptible to nursery cultivation. The vegetables in summer and autumn are mainly cauliflower, cabbage, summer cabbage, lettuce and late autumn pepper, eggplant, and tomato. Summer and autumn vegetable seedlings must be "six defenses", that is, to prevent light, rain, drought, high temperature, pests, and roots.
Determination of the sowing date
The seeding period of the vegetable nursery in the high temperature period should be based on comprehensive consideration of planting patterns, climate characteristics, types of vegetables, and varieties selected. Due to the high temperature, seedling growth and development is fast, and the period of raising the seedlings is significantly shorter than that of autumn and winter vegetables. The melon vegetables only need about 20 days, the eggplant vegetables are about 30 days, and the cabbage vegetables have a seedling age of about 25 days. Nursery facilities
In addition to seedbeds, high temperature vegetable seedlings must use shade and rain protection facilities, use greenhouses, sheds or small arches, covered with shade nets, insect nets, and waste greenhouse films, which can effectively reduce the adverse effects of high temperature and heavy rain on vegetable seedlings. influences. Plot selection
The nursery should be dry and flat, with good soil permeability and water retention, and capable of irrigation and drainage. Avoid breeding seedlings on plots that have been planted with the same vegetable crops on the continuous cropping plot or in order to avoid soil-borne disease hazards and avoid land plots for serious soil pests.
Select fertile garden soil and fully cooked high-quality manure that have not been planted for the same family of crops for many years as bed soil raw materials, and prepare them in a ratio of 2:1 for soil and fertilizer. Each cubic meter of bed soil plus 90% trichlorfon crystals 60 grams, 75% thiram 80g wettable powder, soil, fertilizer, drugs, after mixing well sieved spare. In order to prevent transplant rooting, nutritional seedlings can be used. Seed processing
Warm soup soaking. For example, seeds of melons and solanaceous vegetables are put into warm water of 50-55°C, mixed with hot seeds until the water temperature drops to 30°C, soaked for 6-8 hours, and soaked for 20 minutes with 50% carbendazim wettable powder 500 times. Wash with clean water, and then germinate at 30°C.
Liquor soaking. Seed, liquor and water are weighed in a ratio of 1:0.5:0.5, and the liquor and water are firstly mixed. The seeds are then soaked for 10 minutes. Remove and wash with water.
Potassium permanganate solution soaking. The seeds were first soaked in hot water at 50°C for 25 minutes and then soaked in a 1% potassium permanganate solution for 15 minutes. Soak copper seed solution. The seeds were soaked with fresh water for 10-12 minutes, then soaked in 1% copper sulfate solution for 5 minutes, and then washed with water to prevent bacterial diseases. Carbendazim soaking. After immersing in cold water for 3-4 hours, dip in a 500% solution of 50% carbendazim wettable powder for 1 hour and rinse with water to kill or purify the pepper virus.
Chemical seed dressing. The seeds were placed in a clean container, and 0.3% of the seed weight was added to thiram, carbendazim and other agents, so that the agent adhered evenly to the surface of the seeds and kill a variety of germs.
Do a good job of "six defenses"
Use greenhouses, sheds or small sheds to cover shade nets or waste sheds (mudables) to protect against high temperatures, light, and rain. No old shed film on the seedbed should be covered with a shed film before rain.
Before planting enough water, sow 2-3 times before sowing. After sowing, covered with grasshoppers to keep the seedbed moist, water shortage at seedling stage can be poured in the morning and evening water, add water, prevent heat, drought-induced viral diseases. Insect nets are used to prevent pests such as aphids, whitefly, and spotted fly.
Promote the use of nutrients or paper cups to raise seedlings, reduce the damage to the seedling root system during transplanting, and reduce the occurrence of soil-borne diseases caused by the damage of the root system.
The most common waxy and sweet corn market, waxy corn has higher nutrient content than ordinary corn, containing 70-75% starch (and almost all amylose), more than 10% protein, 4-5% fat and 2 % Of multivitamins have more grains, VA, VB1, and VB2 than rice with the highest content of protein, fat and VB2. Yellow corn also contains carotenoids, such as rice and wheat. The molecular weight of waxy corn starch is more than 10 times smaller than that of ordinary corn. The starch makes glutinous rice sticky and softer than ordinary hard corn. Its digestibility is more than 20% higher than that of ordinary corn, and it is suitable for people with irregular teeth. At the same time, the content of amylose (a kind of polysaccharide) is very high, which is not suitable for diabetics.
Waxy corn is also called sticky corn. The grains have rough, waxy endosperm, similar to shiny, transparent grains, such as hard and dented corn. Its chemical and physical properties are controlled by a recessive gene located on chromosome 9. 100% of the starch in the endosperm is amylose.
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