Knotty kale has a high status in foreign countries, and the Germans believe that knotty kale is a vegetable that can cure all diseases.
China's wondrous book "Compendium of Materia Medica" also recorded: kale, cooking and eating beautiful, its roots through the winter immortality, spring also Ying, vitality, so people are known as "immortal vegetable".
Kale is widely cultivated throughout China, and is one of the main vegetables in northeast, northwest and north China throughout the year.
Also, like most cabbage vegetables, kohlrabi is cultivated in the open field, so when to plant kohlrabi? What are the methods of planting kale?
Knotty kale planting time
Early spring cultivation, late February to early March greenhouse sowing; summer and fall open-air cultivation, after June rows of sowing, the use of insect-proof mesh room seedlings.
Early spring plastic greenhouse kale planting in early and mid-April, spring open field kale planting in early May; fall kale planting in mid- to late-July.
Spring kale in early to late June, fall kale in late September to early October in the size of the leaf ball set, tightness reached ninety percent when harvested one after another.
Knotty kale planting method
Kale seedlings 5 to 6 true leaves period planting, spring kale density in 4500 to 5000 plants / mu; autumn kale in 2500 to 3000 plants / mu.
The open ground is cultivated in rows, and the protected area is cultivated in borders.
Row spacing: spring kale 40 cm, autumn kale 60 cm; plant spacing: spring kale 30 cm, autumn kale 50 cm.
1, spring kale
Planting 5-7 days and then watering a slow water, followed by continuous plowing combined with cultivation 2-3 times.
The greenhouse should be warmed and insulated, the appropriate temperature of 20 ℃ ~ 22 ℃ during the day, 10 ℃ ~ 12 ℃ at night, through the addition of straw thatch, inside the small arch and other measures to keep warm, so as not to be cold for a long time, resulting in undercooked moss extraction, shortening the elongation of the stems, knotting loose, affecting the quality of the goods.
The rosette in the middle of watering a thorough water.
No more watering later, through the control of watering and appropriate squatting, early maturing species 6 days to 8 days, medium and late maturing species 10 days to 15 days, squatting well after the seedling, to be combined with the watering of nitrogen fertilizer (N) 5 kilograms per acre (folding urea 10.9 kilograms), at the same time, foliar spraying 0.2% of the borax solution 1-2 times, to promote the growth of rosette leaves.
The temperature of the shed is controlled at 15℃～20℃ during the day and 8℃～10℃ at night.
Entering the knotting period, often keep the soil moist, medium and late-maturing varieties can be followed by fertilizer 1-2 times.
Control the number of times and amount of watering in the late stage of balling to avoid cracking the ball.
2, autumn kale
3-5 days after another watering, keep the soil moist, after heavy rain, timely drainage.
Pay attention to timely plowing, soil cultivation, plowing 2-3 times before sealing.
After slowing down the seedling, apply seedling lifting fertilizer, 10 kg of urea per mu, the second fertilizer in the early stage of nodulation, combined with watering and applying nitrogen, phosphorus, potassium (15:15:15) composite fertilizer 15-20 kg per mu, and the middle stage of nodulation and applying nitrogen, phosphorus, potassium (15:15:15) composite fertilizer 20-25 kg per mu.
The rosette period should be appropriately controlled watering, nodulation period timely watering, keep the soil moist, according to soil moisture, seedling growth to determine the number of times and time of watering, and gradually reduce the number of times of watering in the late stage.
3. Pest control
①Black rot disease: the early stage of the disease with 14% complex copper aqueous 600 times, or 77% can be killed by the wettable powder 500 times, or 72% agro-streptomycin soluble powder 4,000 times, or 47% Gareon wettable powder 500-800 times, 7 days to 10 days once, continuous prevention and control of 2 to 3 times.
② Botrytis: in the early stages of the disease began to use the drug 40% bacillus 1500-2000 times liquid, or 50% of the 1000-1200 times liquid, 7 days to 10 days between successive prevention and control of 2 to 3 times.
3 soft rot: in the early stage of the disease began to use the drug, 72% agro-streptomycin soluble powder 4000 times liquid, or 77% copper hydroxide 400-600 times liquid, 7 days to 10 days once, 2 to 3 times of continuous prevention and control.
④Black root disease: before sowing, use 0.3% of the seed weight of 50% fumexin + 65% diclofenacin wettable powder to mix the seed, the onset of the early stage of the disease after pulling out the diseased plants in time to spray 75% Chlorothalonil wettable powder 600-800 times solution.
⑤Cabbage greenfly: choose 2.5% cyfluthrin emulsion 2500-5000 times liquid, or 10% bifenthrin emulsion 1000 times liquid, or 50% phoxim emulsion 1000 times liquid, or 1.8% zwitterion emulsion 3000-4000 times liquid spray.
Sixth small cabbage moth: in the 2nd larval stage, use 5% Ruijinte (fipronil) suspension 17 ml to 34 ml per mu, add 50 liters to 75 liters of water, or 5% inhibition of Tabo emulsion 2,000 times, or 1.8% avermectin emulsion 3,000 times, or Bt wettable powder 1,000 times liquid spray.
The above agents should be rotated and alternated.
The above is the planting time and planting method of the ball of kale related to the introduction, the ball of kale prefer cool climate, heat and cold resistance, wide adaptability.
This vegetable crop is early, medium and late maturing, suitable for annual production and balanced supply.
Together with its cultivation and management is simple, the harvest is concentrated on large-scale base production.