Valerian is an annual or perennial herb of the genus Cardamom. It is an important feed plant and can also be used as a vegetable. It is widely introduced and cultivated all over the world. Its hay yield is the crown of many leguminous pastures and its nutrients are complete. It is rich in protein. Trace elements and more than ten kinds of vitamins, let's take a look at the weeding planting technology! The environment for growing grass is warm and humid, and the summer is not too hot, and the winter is not too cold. The optimum temperature is 15 ~ 25 ° C, more than 35 ° C or below -15 ° C will make the sedge dead, winter -8 ° C or so can winter, and more than 35 ° C is difficult to summer. The required rainfall is between 1000 and 2000 ml. It is not resistant to drought and has strict requirements on soil. It is most suitable for growth when pH is 6-7. When pH is lower than 6, lime should be used to adjust the acidity of the soil. It is not resistant to cockroaches and should be planted in well-drained plots. The cultivation season is mainly divided into spring cultivation and autumn cultivation, and is cultivated in autumn. Autumn cultivation will be planted in batches from late July to late September, and will be harvested in succession from mid-August to late March. Spring cultivation is planted from late February to early June, and harvested from early April to late July. In order to avoid the phenomenon that the emergence of seedlings is not neat, seeding should be carried out before planting to reduce the seed and bad seeds in the pod. Soak seeds in warm water at 55-60 ° C for 5 minutes to eliminate floating seeds on the water. In order to overcome the difficulties of early emergence in late autumn, late spring and low emergence rate, germination treatment is usually carried out before sowing. Place the selected seeds in a sack and immerse them in well water or river water for 10 hours at night, then take out the seeds and put them in a cool place for 2 to 3 days. Drain the cold water once every 3 to 4 hours with a watering can. Then sow. The whole planting of alfalfa is a shallow root crop, usually 15 cm deep, combined with ploughing and applying 1000 kg of human and animal excrement per mu, as a base fertilizer, and made 20 cm sorghum, 1.5 m wide to facilitate drainage, and then leveling. After the noodles, you can plant.苜蓿Multiple lines are broadcast. The amount of seeding per mu should be determined according to the season. Generally, when the early autumn and late spring are planted, the temperature is higher, the soil is dry, the emergence rate is low, and the amount of seeding per mu is more, 40 to 50 kilograms per mu. Sowing in late autumn and early spring, 15 kg per acre. The herbicide-removing seedlings grow slowly in seedling stage and are vulnerable to weeds. Weeds should be removed in the seedling stage, and spring sowing should be so. When the grass layer is 20 to 25 cm high, it can be appropriately castrated to enhance ventilation and ventilation. The ability to regenerate after sputum is strong, and the layer of yarrow can be formed quickly. In the hot season, valerian stops growing. The weeds should be removed in time for 2 to 3 years after the formation of the grass layer. If the lack of seedlings is formed due to high temperature and drought in summer, it can be replenished in the autumn and the lawn is restored. Fertilizer management should be watered once a day in the morning and evening after sowing, to maintain sufficient moisture in the soil. Especially in the early autumn and late spring sowing, the water should be kept before the emergence of the seedlings, and the seedlings should be released 4 to 5 days after the sowing. After the emergence, the water should be watered once a day, and the watering can be stopped after 6 to 7 days. When two true leaves appear, the top dressing is carried out. After each harvest, the 0.5% urea solution or the thinly decomposed human urine is applied on the second day after the harvest. If the fertilizer is immediately applied, it may cause rot. After heavy rain and spring rain, pay attention to drainage. The main pests and diseases of pests and diseases are the virus diseases, and the insect pests are aphids and small tigers. Viral diseases occur more than 7 to 9 months. After the mites are damaged, the leaves are small and shrink, and the growth is weak and poor. After September, the climate turned cold and the disease disappeared. The mites are harmful in April to May and from October to November, and can be controlled by 40% dimethoate 800 times solution or 50% anti-potion 2000-3000 times solution. Planting alfalfa fields, the largest number of small tigers, but not easy to detect, usually do not add control, mainly after the can not arrange spring solanes, etc., otherwise lack of seedling roots, difficult to replenish seedlings. When harvesting and harvesting alfalfa, the stubble should be short and tidy, especially for the first harvest. It is necessary to master the principle of low peace, so that the harvest is easy and the output is improved. Sowing in early autumn, harvesting begins about 25 days later, it can be harvested 4 times, and the yield per mu is about 1000 kg. Sowing in late autumn, only harvested 3 times, the yield per mu is about 600-700 kg. Sowing in early spring, harvesting 3 times, the yield per mu is about 500 kg. Sowing in late spring, harvested from the beginning of July to the end of July, harvested 2 times, the yield per mu is about 400 kg. The management of seed retention is basically the same as that of cultivation management, but it is necessary to master several major links such as late sowing, thin sowing, no harvesting and trenching drainage. This article URL: High-yield planting technology of alfalfa [Figure] Stirrer Mixer And Shaker,Magnetic Stirrer,Laboratory Hot Plate,Stirrer With Hot Plate Guangdong Widinlsa International Co.Ltd , https://www.widinlsamachine.com