What are the key points of pollution-free planting techniques for bracken? What is the processing method?

Bracken used to be an inconspicuous dish in the countryside, but now it is more and more sought after and loved by urban people. Why? Because everyone is pursuing a green and healthy life, and bracken is in line with this characteristic. What are the key points of pollution-free planting techniques for bracken? What is the processing method?

What are the key points of pollution-free planting techniques for bracken?

1. Build sheds, prepare land and prosper.

A simple middle shed with bamboo and wood or steel structure is selected for production, which is located in a flat place of higher terrain away from the wind and the sun. The soil requires neutral or slightly acidic, loose and fertile soil, strong water and fertility conservation, and low groundwater level. The width is generally 1-1.5 meters, and 2000-3000 kg of rotten farm manure is applied per mu.

2. planting at the right time

In spring or autumn, dig 12 cm deep trenches every 20 cm on the frog bed, plant the propagated seedlings in the ditch or put the roots one by one according to the plant spacing of 5 cm, cover the soil with 5-10 cm, cover with straw or other straw scales, sprinkle appropriate amount of water, and then cover with greenhouse film or mulch film.

3. Fertilizer and water management

Often use a sprinkler to spray water, but do not accumulate water. After the first batch of sprouts were unearthed, the quick-acting fertilizer (human feces, urine or dihydrogen phosphate bang) was applied in time, and then topdressing for each batch was picked. Cover the film in time after planting. During the budding period, the ground temperature should be above 15 ℃ and the air temperature should be above 20 ℃. After budding, the growth should be accelerated and the temperature should reach 25 ℃. The whole day should be covered within 1 week after transplanting, and the air should be properly ventilated during the day. When the temperature exceeds 30 ℃, the skirt membrane around the shed can be lifted and covered with sunshade net and grass curtain to cool down.

4. Picking

The cultivation with double film mulching in the middle greenhouse can be put on the market one month earlier. When the seedling height is about 25 cm and the leaflets are not unfolded and fist-shaped, they can be harvested once every 2-3 days. From the appropriate part below the fresh part, fold it off one by one with your hand. Then, gently rub the base of the broken Tibetan food on the ground, so that the base is covered with soil, gently put it in the basket with green leather at the bottom, and cover the top of the basket with a layer of grass.

Second, what is the processing method of bracken?

1. Dry processing

Blanch the washed bracken in boiling water for 7-8 minutes. Citric acid of 0.2% Mel 0.5% of mass fraction and sodium pyrosulfite of 0.2% of mass fraction are generally added to the hot stamping solution. Clean sulfur is used when conditions permit, and sulfur is fumigated before scalding. The amount of sulfur used for every 100 kg of bracken is 0.2-0.4 kg, and the ratio of bracken to hot stamping liquid is 1RU 1.5-2. Immediately after blanching, cool the bracken to room temperature with running water, then dry or dry. In order to prevent the uneven moisture inside and outside of bracken, especially to prevent the surface of bracken from being broken and broken due to excessive dryness, excessive wet caking and debris should be removed and accumulated for 3 days to achieve water balance. At the same time, the dried bracken is softened for pressing or packaging.

2. Salting processing

The graded bracken will be cleaned up in buckets of salt. Preparation of saline solution: 42% citric acid, 50% sodium metaphosphate and 8% alum were ground, fully mixed and mixed with 10 times water into a solution for use. Acid regulating water is added to the saturated salt water to make the pH value of the salinization solution reach 3.5-4.5, ready for use. First add 5% salt of bracken in the bucket, then add bracken, sprinkle 10% of bracken weight salt on the surface of bracken, fill the bucket with salt solution, drain the air in the bucket, and seal the salted bucket to get the finished product.