Detailed explanation of planting time and planting techniques of Wudan vegetable (vitamin vegetable)

Wutan cabbage, also known as Castanopsis thunbergii, Castanopsis thunbergii and Pinus elliottii, is a variety of Chinese cabbage. Wutan vegetable is very nutritious. Every 100 grams of fresh leaves contain up to 70 milligrams of vitamin C, 180 milligrams of calcium and minerals such as iron, phosphorus and magnesium, so they are called "vitamin" vegetables. Wudan vegetable looks like a big blooming chrysanthemum, good-looking and easy to raise, and one can grow into a large basin. The following is a detailed explanation of the planting time and planting techniques.

First, the planting time of Wutan vegetable

Cold regions in the north: direct seeding (or sunny bed seedling transplanting) in mid-late June, and harvest from early August to mid-August. It is broadcast live in mid-August and ends in late September and mid-October.

North China: live broadcast from early May to early June and harvest from late June to mid-July. The seeds were sown from mid-August to early September and harvested from early October to early November. Sowing and raising seedlings in late September, transplanting in Yangqi in late October, and harvesting at any time from December to February of the following year.

The Yangtze River Basin: sowing and raising seedlings in September, transplanting in October, and harvesting at any time from December to February of the following year.

2. Planting techniques of Brassica campestris

(1) planting in the open field

1. Sowing and raising seedlings

Wutan cabbage is generally raised and transplanted. The nursery bed should choose the loam that has not planted vegetables of the same family, strong water and fertility conservation and good drainage. The seedbed is made into a flat bed or a low bed, sowing should master uniform sowing and appropriate sparse sowing, too dense can easily lead to overgrowth.

Pour water thoroughly before sowing, then sow dry seeds or soak wet seeds for about 1 hour, and cover with a layer of fine soil 1 cm thick to ensure the normal supply of water. The Chinese cabbage sown at the right time can emerge in 2-3 days, and the seedlings should be planted in time after emergence to prevent overgrowth, which is the key to cultivate strong seedlings. Generally, the seedlings can be planted at the age of 25 to 30 days, and they need to be watered thoroughly before planting to facilitate the extraction of seedlings.

2. Soil preparation and basic fertilizer should be applied to select the mature land with loose soil and free in summer. Ploughing 30 cm deep, applying 2000-2500 kg base fertilizer per mu. The effect of using ammonia as base fertilizer is very good, not only promoting growth, but also sterilizing and reducing diseases and insect pests, with a dosage of about 50 kg per mu.

3. Transplanting from late October to late November, with a density of 15 to 20 centimeters square. The planting depth varies with climate and soil quality, so it is appropriate to plant it shallowly in early autumn to prevent deep planting of rotten heart; after Cold Dew, plant vegetables straight and deep to protect against cold.

4. Field management should pay attention to the quality of planting, ensure the quality of seedlings, and replenish seedlings in time if there is a lack of seedlings. Watering in time after planting to promote slow seedling. Appropriate watering and topdressing of available nitrogen fertilizer after slow seedling is the main link to strengthen growth and ensure high yield and high quality. The growth is slow in winter, and the ground temperature is low, so we should reduce watering and fertilization, and can cover some soil fertilizer, plant ash and so on, so as to keep seedlings overwintering. After turning green in early spring, combined with watering and applying dung water or urea for 2 times, it can be pulled up and listed on the market.

5. The harvest time of Wutan vegetables depends on climatic conditions, variety characteristics and consumption needs. Generally, it can be harvested at 30-40 days after planting, and it takes 50-60 days for harvesting to grow fully. The yield is 1500-2000 kg per mu.

6. diseases and insect pests and their control are mainly virus disease, soft rot, dry burning heart disease and so on, while pests are mainly diamondback moth, aphids and so on. Chemical control can be carried out with 1000 times of 40% dimethoate EC or 2.5% cypermethrin per mu or 800 / 1000 times of 50% Dysenamine aqueous agent, or 2000 times of Yitaibao.

(2) potted planting

1. Soak the seeds

Soak the seeds in 25 degrees warm water for 12 hours, remove and dry. (soak and sprout faster)

2. Sowing seeds

Spread the seeds evenly on the soil, apply a layer of soil after sowing, water thoroughly, moisturize, avoid excessive sunlight, and emerge in about 3-5 days.

3. Intermediate seedlings

When the seedlings grow to 3-4 leaves, you need inter-seedlings. Pull out the seedlings and leave the sturdy seedlings. Leave the seedling gap at about 10 cm. Don't be exposed to too much light in the seedling stage. It can also be transplanted, burn the roots and stems and leaves as far as possible during transplantation, so as not to cause mechanical wounds and induce diseases, and water them in time after planting.

4. Fertilization

Apply some fertilizer appropriately when the plant is picked.

5. Nursing

Like cold and cool, not resistant to high temperature, keep the soil moist during the growing period.

6. Harvest

It can be harvested in 50-60 days.