Cauliflower, also known as cauliflower, is evolved from cabbage. It is a kind of vegetable with rich nutrition and high VC content. What's more valuable is that many kinds of Korat derivatives contained in it can increase the activity of aromatic hydrocarbonase in human liver. Enhances the body's ability to break down carcinogens. Winter broccoli can be cultivated in open field in cold winter, and it can be safely overwinter without any protection measures. It is timely harvested according to the growth conditions in the early March to early April of the following year to make up for the shortage of fresh broccoli in the early spring. High, deeply loved by farmers and vegetable brokers, but wintering broccoli needs special attention in the following 8 key cultivation techniques 1 Variety selection is crucial Winter broccoli requires stricter varieties, and varieties with strong cold resistance and strong disease resistance should be selected to ensure safe wintering without any protective measures in normal winter conditions. The growth period of the cultivar is required to be over 220 days. If a cultivar with a growth period of 160 to 200 days is selected, the extremely cold climate will be encountered in December or the next January when the ball is displayed, resulting in fewer leaves, smaller flower bulbs, and flower bulbs. It is easily frozen and the yield and quality are seriously reduced, thus affecting the income of growers. The relatively better varieties of winter cauliflower on the market today include Donghua No.1, Donghua No.2, Donghua No.3, Base Winter Flower, and Winter Flower Winter King. 2 Cultivate strong seedlings It is best to use a field soil that has not been planted with cruciferous vegetables in the past 3 years for scientific cultivation of nursery soil seedlings, and to use top soil within 15 cm. Every 1m3, add 30 to 40 kg of fully decomposed organic fertilizer and potassium sulphate ternary compound fertilizer (15:15=15) to 2 kg, then mix, break, and sieve. Scientifically sterilize, mix 50% methine wettable powder and 50% carbendazim wettable powder by 1:1, mix 10g per 1 m3 seedbed with 20-25kg nutrient soil, and spread 3/4 on the seedbed surface. About 10cm thick, 1/4 cover species. The seedbed width depends on the situation, generally 1m, the length of which depends on the number of nursery. Seed treatment: Cauliflower seeds are first soaked in normal temperature water for l5min, then removed and put into 50°C hot water and stirred constantly. After 15min natural cooling, continue soaking for 30-40min, remove and dry to wrap with moist cloth, 2～4h After the seeds are white, you can sow. Sowing seedlings and sorghum seedlings, before planting, the seedbeds are leveled and the soil pieces are broken up. The seedlings are first drenched with a small amount of water. After the water is completely infiltrated, a layer of disinfected dry nursery nutritious soil is gently sprinkled, and then the seeds are uniformly sown and covered after sowing. 0.5 to 1.0cm thick nutritious soil, take a small arch shed on the surface, with a double layer of 70% shade net or straw shade moisturizing. After about 70% of the seeds have emerged, shade is covered before 9:00 in the sunny and 17:00 in the sunny days. When the cotyledon is flattened, the shade net or grasshopper is removed. After sowing, try to keep the temperature around 25°C to promote its emergence as soon as possible. Do not water before emergence, pay attention to thinning, 3 leaves 1 heart when the Dingmiao, seedling distance lOcm10cm. Seedling stage should be poured with small water, keeping the seedbed moist, pay attention to cultivator weeding, pest control. 3 timely planting, select the best colonization density Select the optimum planting density depending on the situation. The wintering broccoli in Jiangyan area is normally raised at the end of July and early August. The seedling age is about 30 days, and the planting time ranges from 4 to 6 leaves. The row spacing is 50-55cm, the plant spacing is 50cm, and 2600 plantings per acre are planted. The size of the seedlings was divided to improve the uniformity of the field and remove too weak seedlings so as to avoid scattering after planting. The colonization density is too small. Although the number of single flower bulbs is large, the number of plants per acre is small, and the total yield is low; the colonization density is too large, the vegetative growth is relatively prosperous, the flower bulbs have green lobule on the surface, the appearance is poor, the commodity value is low, and the yield is affected. . 4 Sufficient soil and water Overwintering broccoli is hi wet and hi-fertilizer. It requires loose sandy loam with deep soil, good drainage, strong water retention, and rich organic matter. For winter broccoli to be productive, it must be ensured that the rosette leaves grow well and form a relatively large vegetative body. If the fertilizer and water conditions are insufficient, the plant vegetative body will be relatively thin and the formed flower bulbs will also be small and not compact, and the aging seedlings will be formed when serious. If the soil is too thick and the plants grow poorly during the winter broccoli growing process, flower balls will be formed in advance, and the balls will be small and of poor quality. Too much soil moisture will affect root growth, resulting in poor root development and, in severe cases, plant withering. 5 Do a good job of pre-winter management Winter winter broccoli fertilizer management must be combined. After planting, the seedling water should be poured in 1 to 2 times in a timely manner. After broccoli easing, the topdressing 15 to 20 kg of urea per acre is used as the seedling raising fertilizer, and weeding and weeding. Seedling timely water control seedlings, keep the soil see dry see wet, promote the thick stems, dark green leaves, improve plant resistance to cold. Plant cultivating soil before mulching, in order to protect the roots of overwintering cauliflower, topdressing 20-30kg urea or decomposed organic fertilizer 500kg per mu. Before wintering, about 18 pieces of cauliflower plant leaves must be grown to ensure safe wintering and high yields. From mid-to-late November to mid-December, before the advent of cold temperatures, the frozen water shall be poured in good time, and water shall be poured in order to increase the heat preservation capacity of the soil. Winter broccoli usually does not water and fertilize during winter, but if it encounters a particularly dry year, when the plants appear partial wilting and the lower old leaves turn yellow, the soil and plants can be thawed and then watered once in the sunny morning, but be sure to There is no accumulation of water on the surface, to avoid freezing damage to the plants due to the decrease in temperature during winter nights. 6 Fertilizer management after winter In mid-February of the following year, the weather became warmer. When the overwintering broccoli began to turn green in the open year, the green water was poured in time according to soil moisture conditions to promote the growth of the outer leaves. When the leaves are screwed, 15kg of urea and 5 to 10kg of potassium sulfate are applied per mu, so as to facilitate the survival of winter broccoli. The broccoli is watered once a week, and is topdressed every 2 weeks depending on the situation to ensure that the flower bulbs need to grow. During the formation of bulbous enlargement, the flower bulb is most sensitive to moisture, the excessively large flower bulbs are susceptible to mildew, and the commercial quality is affected and the quality is poor. If the soil is short of water at this time, the leaves shrink, the flower bulbs are scattered, and the yield is low; therefore, According to the spring rain conditions in the area, it is important to do a good job of irrigation and drainage. 7 timely folding leaves protect the ball In direct sunlight, the flower ball will change from salty to pale yellow, green, or hairy balls, and the product will be deteriorated in merchandise. Therefore, when the flower bulb is formed at the early stage and its diameter reaches 8 to 10 cm, the lower leaves of the flower ball can be covered and covered. Take a ball and keep the ball white and smooth. 8 timely harvest According to the open field winter broccoli ball time early and late batches timely harvest. Generally when the flower bulb is fully grown and the flower buds begin to rewind downward and have not spread yet, they are harvested. The premature harvest was not high, the harvest was too late, the flower ball was loose, yellow, the surface uneven and the commodity was poor. 5 to 6 leaf-covered flower bulbs are often reserved during harvest to protect the flower bulbs from external damage and pollution, and to increase commercial quality. Esophagus and Bronchoscopy Instruments We're professional Esophagus and Bronchoscopy Instruments
manufacturers and suppliers in China, specialized in providing high
quality medical instruments with reasonable price. We warmly welcome you
to buy or wholesale bulk Esophagus and Bronchoscopy Instruments for sale here and get quotation from our factory. Bronchoscopy Instruments,Esophagoscopy Instruments,Bronchoscopy Biopsy Forceps,Esophagus And Bronchoscopy Instruments Tonglu WANHE Medical Instrument Co., Ltd , https://www.tlvanhurhealth.com