While cabbage is one of the main vegetables of the northerners in the spring of winter, in recent years, for various reasons, the supply of cabbage in the south-central region has been unstable. Since many large cabbage-producing areas in 1998 suffered from severe illnesses that led to a substantial reduction or even crop failure, it is essential to adopt more rational high-yielding cultivation techniques based on the choice of highly resistant species。
1. Finely finely selected plots of fertile and easy-to-drink soil are suitable for application at the end of july or the beginning of august, at the bottom of the ground, at 4-5 m3 or 2-3 m3 for application to 667 m2 or other organic fertilizers, 20-25 kg for compound ammonium and 20kg for potassium。
Ii. Implementation of semi-high plant 1. Adoption of semi-high plant cultivation has the advantage of improving the permeability of the soil, promoting the growth of large cabbage root systems, reducing root diseases, contributing to drought and drainage, and making young seedlings less susceptible to irrigation and rain-fed leaves. 2. Semi-heavy construction generally requires a height of 10 cm and a wide back of 40 cm. 60cm。
Iii. Fluorine application per 667 m2 during the first day of seeding or seeding, using chemical weeding an elixir herbicide of 120-150 ml is sprayed in a uniform manner and mixed with a rake or broom in a timely manner to prevent photolysis and to control weed growth。
Choose disease-resistant varieties, select disease-resistant varieties that are suitable for local cultivation, preferably new ones, and demonstrate high fertility through production demonstrations. It is not possible to adopt brands blindly for a long period of time, in accordance with past planting habits, because, after years of widespread expansion in one area, the number of brands can lead to the occurrence of a corresponding disease when climatic conditions are not conducive to the growth of large cabbage, as a result of caste degradation, reduced resistance to disease or the emergence of new physiology due to certain major diseases. In 1998, during the devastating year of cabbage, hebei province introduced a number of non-field brands such as tai chi, xibing 70, xiong 80, 83-24, middle white 4 and others, with 80 per cent of the plots being cut or cut off. In recent years, the province has grown such types as pre-established “earth and white”, “regulated three”, “breed 29”, “breed six”, “green 85” and “silent 88” types of buns, while the vegetable farmers react to a good increase in cabbage and little disease. These varieties are well adapted to local climate conditions and are characterized by high levels of disease resistance, high productivity and steady productivity. The selection of these new varieties is contrasted with the production of the most widely grown local brand-named varieties, which can be validated only if their major characteristics and yields exceed the contrast, so that the newly selected varieties are generally the best at present。
The selection of the suitable duration of the broadcasting period shall be based on climatic conditions around the autumn of the year. Winter-stored cabbage tends to grow better two days before and after the autumn festival. In special years, such as in july, when the weather continues to be hot and dry, seeding should take place at an appropriate error of two days, if in july it is cooler and rainy, and can be done two days in advance, and the species with special requirements should be selected for the duration specified by the type. The planting of premature diseases is severe, the planting is too late, the ball is bad and production is low。
1. Once the seedlings are strong, they are seeded in a shallow ditch, deep 1 to 1. 5 cm, wide 1 to 1. 5 cm, spread the seeds across the ditches and water them with a broom. This method prevents heavy rains before seeding, with a volume of 150 to 200 g in 667 m2. The seedlings are usually draught with 2-3 water, which is detected within 10 days of the seedlings being produced, and are immediately replaced by a break in the seedlings, which are spread evenly for about 15 days. Twenty-five days after seeding, a healthy seedling is selected to grow in a consistent manner, and heterogenesis and insects are eliminated. When the seedlings come out, the number of waters to be poured is determined on the basis of soil saplings, the drainage of the water is observed in the years of floods, and the water is to be poured in small quantities in the years of drought, either in the evening or in the morning. Quick-activated nitrogen fertilizers, which should be applied at a time of 2. 5 ~ 4 kg/667 m2, also known as seed fat, after two real leaves. If weeds are so shallow that they are not more than 1 cm deep that they are no longer cultivated, they must be “weeded”, “weedless” and reduce root and plant mechanical damage. Aphids and larvae must be eliminated in a timely and thorough manner, and care must be taken to prevent the hazards of underground pests such as vermin, such as bait. To ensure the healthy growth of the seedlings. 2. A full supply of water and fertilizers shall be guaranteed for the full duration of the lotus term, that is, from the tree to the ball. In the past, the practice was to control growth, i. E., to control growth, to break backs, to crouch, etc., which is now being replaced by “to push up”, by “not to till, not to crouch, not to break, and with grass to remove the grassless rabbits”. In order to ensure the availability of water for this period, the water-watering principle is “wet drying”, which should be followed by increased phosphate-based fattening of 5-10 kg per 667 m2 of potassium phosphate, 10-15 kg of urea, followed by water to the vegetable field and then another 2-3 days. 3. The final phase of the hyena, which should be completed, should be followed by a large amount of water in pursuit of fattening, adequate water supply, with two major pursuits of fattening, and the first, prior to the end of the ball, 667 m2 of ammonium sulfur 10-15 kg, urea 15 kg or manure 800 kg of manure. The second fertilisation is in the middle of the ball, usually 15 days after the first fertilisation, with the application of only quick nitrogen fertilizers and no more human urine, and the general 667 m2 urea 15kg, which promotes cabbage to quickly round the ball. Insects such as aphids, vegetable larvae and larvae should be thoroughly combated before the end of the season to prevent insects from entering the ball. It would be preferable to opt for low-toxic pesticides with short-lived effects. As cabbage enters the end of the ball, and as a result of lower temperatures and reduced absorptive capacity of the root system, the demand for water fattening is gradually reduced. It is therefore necessary to control the supply of water fattening to avoid waste and to lay the groundwork for transport and winter storage, usually at a time when only a small amount of thin fertilizer is to be applied and water is to be stopped 10-15 days before harvest. Winter cuisine is usually harvested in november and, if properly managed and selected, the production of 667 m2 can be around 10,000 kg。
