Cauliflower is a semi-cold-resistant vegetable with a narrow temperature range and strict selection of cultivation season and variety. Therefore, it is necessary to strictly control its cultivation measures in order to achieve high yield and quality.
Chinese Herbal Medicine (English name: Chinese herbal medicine): Chinese medicine is mainly composed of botanical medicine (root, stem, leaf, fruit), animal medicine (viscera, skin, bone, organs, etc.) and mineral medicine. Because botanical medicine accounts for the majority of Chinese medicine, Chinese medicine is also called Chinese herbal medicine.
There are about 5,000 kinds of Chinese medicines used in various parts of China, and there are countless prescriptions made by combining various medicinal materials. After thousands of years of research, an independent science, Materia Medica, has been formed. Various medical schools in China have set up the course of natural medicine, which is called the Chinese herbal medicine.
The concept of plant extracts can be accepted and recognized by various countries, and it is also a common expression used to spread herbal medicines in various countries. The export value of plant extracts in China exceeded the export value of Chinese patent medicines as early as 1999. In European and American countries, plant extracts and their products (plant medicines or food supplements) have a broad market prospect, and have developed into an emerging industry with annual sales of nearly 8 billion US dollars.
The plant extracts in China are generally intermediate products, which are widely used, mainly used as raw materials or auxiliary materials for medicines, health foods, tobacco, cosmetics, etc. There are also many kinds of raw material plants used for extraction, and there are more than 300 plant varieties that are extracted industrially.
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First, the choice of varieties of autumn and winter cauliflower should choose strong heat resistance, high yield of Hongdu 16, Tianjin Hong Kong flowers and other varieties.
Second, nursery
1. Seedbed preparation. Cauliflower was transplanted and transplanted. Select terrain Gaozao, convenient irrigation and drainage, soil loose fertile, the former is a non-cruciferous vegetable plots for seedbeds, land preparation in advance, full sun, Mushi 5000 kg high-quality decomposed organic fertilizer and appropriate amount of compound fertilizer, made after leveling Gaochun, Yikuan 1-1.2 meters long, 6-8 meters long, digging a drainage ditch around the seedbed in order to facilitate drainage.
2. Sow. Generally sowing in late July - early August, available dry seeds, can also be used for 3-5 hours soaking in cold water, remove and dry after sowing, sowing foot water before sowing, water seepage in the seedbed sprinkle a thin layer of fine soil Spread the seeds evenly in the pods and cover them with 1 cm thick fine soil.
The nursery is in the high temperature and rainy season in summer. Immediately after sowing, a shade shed is placed to prevent the high temperature and heavy rain from harming the seedlings. At this time high temperature and drought, we must spray small water, keep the surface wet, after the Qimiao to pour water to cool.
3. Seedbed management. Timely weeding, seedlings, and inadequate nitrogen nutrition at the seedling stage or excessive rooting of the seedlings can easily lead to "early ball shooting," resulting in small balls and loss of commodity value. Therefore, after the second thinning, the top dressing is combined with watering. The seedling period coincides with the rainy season. It is necessary not only to prevent floods, but also to prevent drought. To meet the drought, we must use small water to keep the soil moist and prevent "early ball" or leggy. In addition, a sub-seedling should be conducted before planting to expand the nutrient area for seedling growth. The ratio of sown seedlings to seedlings is generally 1:4. Sub-seedlings should be selected on cloudy days or in the afternoon when the temperature is low. Press 1 cm square in 10 cm square, submerge the seedlings, pour out clear water, lower the temperature, and promote rooting. After the pouring, shallow cultivating is carried out in time to slow down the seedlings, control the watering as much as possible, and prevent the invasion of diseases and leggy.
Third, planting approximately at the end of August and early September, suitable for 30-35 days of seedling age, there are 5-6 true leaves when planting. Before planting, Mushi composted 5000 kg of organic fertilizer and 50 kg of superphosphate. It was made into east to west. It was 6-8 meters long and 1.2 meters wide. It was planted at a spacing of 4060 centimeters, planted at a depth of 10-12 centimeters, and planted 2700 acres. . After planting water.
Fourth, after planting, after the management, planting, pour 1-2 times slow water, cultivating and weeding 3-4 times for seedlings. After 7-10 days, the weather turns cold, and the cauliflower will enter vigorous growth period. Mu recovery 10-15 kg of urea or compost dilute 800-1000 kg, alternating application, a total of 2-3 times chase, after the shed is no longer fertilizer.
Watering to keep the soil moist, especially in the vigorous growth period of leaves and flower bud hypertrophy period, can not be short of water, generally 5-7 days pouring a water, after mid-October, the temperature gradually decreases, to control the amount of water and watering times .
V. Post-stamp management
Before mid-October, the scaffolding should be set up and the plastic film (preferably without drip film) should be prepared. In the late October, the film should be covered with a shed, and the straw should be covered at night before and after the winter to meet the water requirement during the entire lock period. Sprinkle a large water before the shed, and then no longer water.
The key to post-stamp management is temperature and air humidity. With high temperature and high humidity, not only plants are prone to infection, but also they have small balls, low yields, and poor quality. Therefore, at the beginning of the shed, it is necessary to grasp the large ventilation measures for early opening and closing of the estuary. With the gradual decrease in the outside temperature, the ventilation time and ventilation volume should be reduced accordingly. Generally, when the temperature in the shed reaches 15°C, the air is released and the temperature of the shed is controlled. After more than 25°C, ventilation is gradually reduced in the afternoon and the air outlet is closed when the temperature of the shed drops to 15°C. If it is cold or cloudy, it is necessary to expose the grass cover early, without ventilation or with less ventilation.
6. The harvest is generally harvested from the end of November to the beginning of December and should not be delayed so as to avoid freezing damage. 
