It has a compact texture, less water, more fiber, a strong mustard taste and a little bitterness.
So, when is the planting time of kohlrabi? What are the planting methods? How to manage it? Let's take a look at it.
The planting time of kohlrabi is in spring and autumn, and it is planted in July 7- 10/October in autumn.
Before planting, you need to expose the plant to the sun for two or three hours, then wrap it in a wet towel and leave it at 20-25℃ for about three days. Pay attention to spraying water every day to keep it moist, and after three days, you can take out the seeds and plant them.
After planting in the soil, just water it. Water it slowly and don't rush out the seeds.
Planting method of kohlrabi 1, sowing and seedling raising kohlrabi can be planted directly or transplanted.
However, in order to manage and use the land conveniently, seedling transplantation is often used.
Kohlrabi is suitable for growth in cold and humid seasons, and the suitable temperature for growth is 15-20℃.
High temperature in the early stage is beneficial to the growth of seedlings, and low temperature in the later stage is beneficial to the expansion of fleshy roots because of the large temperature difference between day and night.
Therefore, the sowing date varies with the local climate, and the Pearl River Delta region usually sows in September 9- 10/0.
The method of raising seedlings is the same as that of raising seedlings of mustard and Chinese cabbage. Choose a fertile, moist and well-ventilated place, apply sufficient base fertilizer, make a high border, break and level the clods, and then sow.
After emergence 10 days or so, alternate seedlings 1 time, pull out the poor seedlings that are too dense and damaged by pests and diseases, and the seedling spacing is 6 cm square.
During the growth of seedlings, it is necessary to apply fertilizer, drench water and spray pesticides to kill insects.
About 26 days after sowing, when the seedling height is12-15cm and there are 4-5 true leaves, it can be planted.
2. Soil preparation and transplanting kohlrabi is a root vegetable. Clay loam or loam with deep and fertile soil layer and convenient irrigation and drainage should be selected as the planting ground, and the vegetable field or paddy field that has not been planted with Cruciferae before.
Soil preparation and other work are basically the same as radish, that is, the front crops are plowed and sun-dried, decomposed organic fertilizer 1500 kg and compound fertilizer 50 kg are applied per mu as base fertilizer, and after fertilization, plowed and harrowed to make a high ridge with a width of 0.7 m or 1.5 m and a ditch width of 0.5 m.
Large-scale varieties, such as the yellow seedling variety of the lotus pond, can be planted in a narrow border of 0.7 meters, with a spacing of 30 cm and about 3600 plants per mu; Small and medium-sized varieties, such as the fine-seedling varieties of head vegetables in the south of the Yangtze River, use a wide border of 1.5 meters, with a row spacing of 25×35 cm and 5000-6000 plants per mu.
Generally open holes for planting.
When planting, the straight roots are buried in the soil, then slightly lifted to straighten the roots, and then slightly pressed and watered.
3. Fertilizer and water management If the weather is dry after planting, spray water 1-2 times a day. After 5 days, live seedlings, and then spray water appropriately according to the weather.
Water should be properly controlled before the fleshy straight root swells, so that the straight root will grow deeply, and the soil will remain moist after swelling. When the fleshy root forms later, water should be controlled, and irrigation should be stopped 7 days before harvest, so as to enrich the tissue and improve the processing quality.
Top dressing with 1 time fertilizer ten days after planting, and then with1time fertilizer seven days later, the fleshy roots begin to swell. Top dressing with 1-2 times of heavy fertilizer and additional potassium fertilizer (per mu 15 kg) are required.
Before each fertilization, loosen the soil and weed, and spray water 1-2 days after fertilization to promote the dissolution of fertilizer for crops to absorb.
Cultivate the soil 1-2 times during the growth period to avoid the root exposure affecting the quality.
4, pest control The main diseases of kohlrabi are soft rot, virus disease, downy mildew and root rot.
Soft rot can be sprayed with 70% thiophanate methyl wettable powder 800- 1000 times or with World High Water Dispersible Granule 1000- 1500 times.
Virus disease: aphids should be avoided to raise seedlings, and the virus K 1000- 1200 times solution or the virus killing 1000 times solution should be sprayed after 5 pm.
Downy mildew can be controlled by 500 times of 75% chlorothalonil wettable powder, 800 times of 25% toxic mildew wettable powder or 800 times of 25% Yishuangling alternately.