What are the latest cultivation methods for hemp?

The cultivation history of hemp is already very long. The earliest artificial cultivation was during the Han Dynasty in our country. Hemp is a natural fiber. In the past, many clothes were made from hemp. Its breathability and heat dissipation functions are both very good, and now the other values of hemp have also been developed. Hemp, which was originally relatively rare, has once again become a relatively sought-after product, and hemp cultivation is also becoming increasingly popular. So today let us follow Qinongwang to take a look at how hemp is cultivated.

1. Select good seeds

Although for a long period the cultivation prospects of hemp were not very good, there were still quite a few people cultivating it, and during the cultivation process there are always all kinds of problems, so hemp varieties have also undergone many years of improvement. There are now many varieties of hemp, so when choosing varieties we should try to choose seeds that are relatively plump, relatively uniform in size, and relatively good in color. Secondly, although hemp has good resistance, we still need to analyze the climate and environment of the planting site and then choose the best variety. After all, the quality of the seeds is the foundation of whether its yield will be high or low.

For hemp cultivation, it is best to choose soil with relatively sufficient fertility, relatively strong water storage capacity, and relatively good permeability. Sandy soil relatively fits these characteristics. Secondly, the pH of the soil should be moderate. Most importantly, the growth of hemp requires sufficient sunlight, so it is best to choose a sunny location. During land preparation, pay attention to plowing the land a bit deeper as much as possible, then make the soil fine. Finally, the land needs to be opened into beds, generally 1.5 m wide, and then drainage ditches need to be made well in the field, generally 20 to 30 cm wide. In this way the drainage system is relatively complete, which will make drainage and field management convenient later.

3. Reasonable sowing

We generally sow in March and April each year and in July and August each year, because at those times the soil temperature has basically reached about 10 to 15 degrees, which just meets the basic conditions for hemp growth. Then before sowing we first need to treat the seeds a little, which is beneficial for seed germination. The method is actually very simple: just put the seeds in the sun to dry for five or six hours and then they can be sown. There are three sowing methods. The one we most often use is drilling, because it is both simple and convenient to manage. Next there are also broadcasting and hole sowing, which can be chosen according to one's own planting habits. After scattering the seeds into the field, we need to cover them with a thin layer of soil, and then cover them with a layer of straw or plastic film, so that hemp will germinate faster.

4. Scientific fertilization

Hemp is different from other crops. Apart from base fertilizer, it only needs two topdressings. The first is when hemp has grown five or six cm, mainly to promote seedlings, so we mainly use urea and apply the topdressing by broadcasting. The second is when hemp has grown to about 30 cm. This period is the fastest stage in its growth cycle, so we can apply an appropriate amount of urea at this time, which can speed up its growth.

5. Field management

Field management generally includes weeding, watering and irrigation/drainage, and pest and disease control. Weeding is actually relatively simple: each time fertilizer is applied is the time to weed, which can make nutrients easier to absorb and also let the soil breathe, thereby enhancing hemp's ability to resist diseases. The growth leaves of hemp also need a certain amount of water, especially at its most vigorous growth stage, when it basically needs watering once every three days. At ordinary times it is basically watered about once every ten days. When there is relatively heavy rainfall, we need to drain the water promptly, and waterlogging must not appear in the field. Finally, there is pest and disease control. The most common diseases are damping-off, seedling blight, and downy mildew, which we can control with Bordeaux mixture, chlorothalonil, and propamocarb water solution respectively. The pests are generally flea beetles and weevils, which we can control directly with trichlorfon solution.