Artificial cultivation is mainly based on leeks and loose-leaved leeks, and can be used in spring, summer and autumn. Spring cultivation is carried out from late February to late April; summer cultivation is carried out from early July to late August; autumn cultivation is planted from early September to early October. The North China region can be cultivated in the second season, and the spring cultivation is planted in early March to late April; the autumn cultivation is from early July to mid-September. It can be planted at any time from the beginning of October to the beginning of February of the next year, using plastic greenhouses or greenhouse cultivation. First, the variety Wild leeks vary in shape from region to region and there are no fixed varieties. At present, there are two types of leeks cultivars: leeks and leeks. Amaranthus chinensis is also called big leaf leeks, with thick leaf heads. Its leaves are large and thick, cold and heat resistant, fast growing, early maturity, good appearance and good merchandise; but winter is weak, spring planting is easy to bolt, usually for summer and autumn. Cultivation. Amaranth, also known as eucalyptus, eucalyptus, leaves narrow and short, leaf fluff more, more heat-resistant, drought-tolerant, strong winter, can be cultivated in spring and autumn. Second, cultivation techniques (1) Site selection and land preparation: The adaptability of amaranth is very strong. In addition to the use of land preparation for planting, it can also be used for planting after the field, the wind barrier, and the ground. If it is planted in pieces, it is best to choose less weeds, and the front is tomato, cucumber, corn, garlic seedlings, should avoid continuous cropping. When plowing the ground for 15 cm, apply enough base fertilizer, make it fine, and make it 2 meters wide (with ditch), and the height is 15 cm, so that it can be drained. (2) Sowing: Generally, weaving is carried out, with 0.75~1kg for 667m2 spring sowing, 2~2.5kg for summer sowing and 1~1.5kg for autumn sowing. Spring is broadcast from late February to late March; summer is broadcast from late July to mid-August; autumn is broadcast from early September to early October. When spreading, strive to be even. After sowing, gently step on the surface with your feet, so that the seeds are in close contact with the soil, so as to facilitate the water absorption of the seeds and early emergence. For example, during the summer and autumn, the new seeds harvested in the same year are used for sowing. Since the seeds have not left the dormancy period, they need to be germinated in the autumn. Therefore, in summer, the seeds are often placed in a low temperature (refrigerator) at 2-7 ° C, and then germinated after germination. (3) Field management: The resistance of amaranth is strong, and there are few pests and diseases during the growth period; the amaranth enjoys a cool climate, and the shading net should be covered after sowing. On the one hand, it can reduce the temperature of the sunshade; on the other hand, it can reduce the surface moisture. The transpiration, uncovering the net in the evening. The leeks cultivated in spring and summer are usually topdressed twice due to the short growing season. The first time is in 2 true leaves; the second time is 15 to 20 days apart. Each time he per hectare is used to manure 22,500 kilograms of urine or 150 kilograms of urea. The harvesting period of autumn sowing amaranth is longer, and each time it is harvested, it should be topdressed once and can be topdressed 4 times. The density of amaranth cultivation requires a lot of water, so it should be watered frequently to keep the soil moist. After the thunderstorm in the summer and autumn, it is necessary to use the watering can to splash the leaves in the leaves or the cabbage in the early morning, otherwise it will affect the growth. In the normal climate, 5 to 7 days of spring sowing can be seedlings; 3 days of sowing in summer and autumn can be seedlings. Before the emergence of the seedlings, it is necessary to pour small water and keep the soil moist to facilitate emergence. Pay attention to proper irrigation after emergence, keep moist to avoid drought, and pay attention to drainage and flood prevention during the rainy season. Autumn sowing leeks should be properly controlled before winter to prevent the children from taking advantage of safety and wintering. Amaranth plants are small and easy to mix with weeds, and weeding is difficult. To this end, we should try to choose plots with less weeds. In management, we should always plough and pull grass, and pull out early, pull out, pull out, do not wait for grass to crush seedlings or pull up large grass wounds. (4) Harvesting Properly harvested leeks can increase production. Generally, use a knife to pick and choose to stay small, but pay attention to evenly. In the thin places, even the large seedlings should be kept; in the dense places, the seedlings should be picked up, so that the remaining seedlings grow evenly and increase the yield. Spring sowing and summer sowing of leek grows fast, usually from 30 to 50 days from sowing to harvesting; harvesting 1 or 2 times. The leeks that are planted in autumn are harvested for 30 to 35 days, and then harvested 4 to 5 times in succession. The Yangtze River basin can be delayed until Hunchun. In order to increase the production and extend the supply period, the collection will be fine and diligent, and the dense place will be collected and diluted, so that the left amaranth will grow in balance. When harvesting, choose a large plant with 10 to 13 true leaves and harvest it with roots. Leave the medium and small seedlings to continue to grow. At the same time, pay attention to the first densely planted plants, and then the rare places, so that the remaining plants are evenly distributed. Watering should be carried out in time to ensure that the remaining plants continue to grow. 37,500 to 45,000 kilograms per hectare. GMP ATS Injection, Tetanus Antitoxin, Tetanus Toxoid ,Tetanus Antitoxin Injection, Antitetanus, Refined Tetanus Antitoxinsupplier in China Tetanus Antitoxin,Tetanus Toxoid,Tetanus Antitoxin Injection,Antitetanus&Refined Tetanus Antitoxin FOSHAN PHARMA CO., LTD. , https://www.forepharm.com