The latest seed sowing method of Codonopsis pilosula

Codonopsis pilosula likes mild and cool climate, breeding commonly used seed direct seeding and seedling transplanting two methods, but seed direct seeding is good, seedling selection semi-shade semi-sunny slope, near the water source, no underground pests and perennial grass hillside land and two wasteland, seeds to choose new seeds, let's take a look at the seeding method of Codonopsis pilosula seeds!

The planting time of Dangshen

1, winter sowing: winter sowing in the "frost" to "winter" between the next seed does not need to be treated, after winter rain and snow infiltration, the next year early emergence, growth, drought resistance, because the Dangshen seed is small, cover the soil to be shallow, winter sowing in case of strong wind will easily blow the seed away, there is a lack of seedlings phenomenon.

2. Spring sowing: Spring sowing is appropriate before and after the spring equinox. The seeds need to be treated, select full and mildew-free seeds, put them into cloth bags, put them in warm water at 40℃, rub them immediately for about half an hour, take out the cloth bags until no yellow water flows out, cover them with wet sacks, put them at 25~30℃, germinate, wash them with water at 40℃ once every morning and evening, keep them moist, and sow them when they germinate 4~5 days later.

Seeding method of Dangshen

1, drilling: in the whole border, according to the row spacing of 15~20 cm, about 1 cm deep ditch, the treated seeds and fine sand mixed, scattered in the ditch, covered with soil, stamped, and then covered with 1 cm thick fine sand.

2. Sowing: on the whole ridge surface, mix the seeds with 10 times of fine sand, evenly sprinkle them on the ridge surface, use iron rake to combine the seeds with the soil, then level and suppress the ridge surface, and then cover 1 cm thick fine sand. The seed amount per mu is about 1 kg. It can also participate in corn intercropping, which can not only play the role of shading seedlings, but also serve as the support of Dangshen stems and vines. Strengthen field management and achieve double harvest of grain and medicine.

Seedling Management of Dangshen

1. Intertillage and weeding: keep the seedbed moist after sowing, seedling emergence in about 9~13 days (in case of drought, seedling emergence time is longer), start intertillage and weeding when the seedlings grow 2 true leaves, intertillage and weeding should be shallow, avoid burying seedlings and damaging roots, stop intertillage and weeding after the seedlings are sealed, and pull out the grass by hand to prevent damage to the seedlings of Codonopsis pilosula.

2. Remove the cover: Dangshen seedling has two pairs of true leaves. When it reaches more than 1 cm, it should choose cloudy afternoon to remove all the covers at one time. It can also remove half of the cover first when Dangshen is 1.5 cm high. The seedling height is 3 cm and then remove all the covers. If there is more rainfall in the early stage of coverage, the covers are close to the ground and some of them rot. Most seedlings can penetrate the covers, that is, they do not need to remove the covers until they start seedlings.

3. Reasonable thinning: for fields with dense seedling growth, thinning should be carried out when the seedlings grow to 5~7 cm, the minimum seedling spacing is about 1.0 cm, the average seedling spacing is 3.0~3.5 cm, and the density is 800~1000 plants/square meter.

4. Fertilizer and water management: topdressing according to the seedling situation. 50g urea and 50g potassium dihydrogen phosphate can be added with 10kg water respectively. Spray on the seedbed. Keep the ridge surface wet before the seedling emerges and during the seedling stage. Drain water in time when there is excessive precipitation. When there is severe drought, water in time. Cover a small amount (about 0.5cm thick) of fine soil on the seedling ground before freezing to prevent soil cracks from damaging seedlings in winter.

5, timely seedling: Dangshen seedlings in the field winter, the next spring after the soil thaw, before transplanting seedlings, pay attention to avoid root damage, seedling method is to dig up the seedlings with three teeth iron branches, and then gently turn down, pick up seedlings, shake off the soil, dig up the seeds according to 20% of the soil, tie into 400~500 grams of small, put into sacks or plastic woven bags, transported to the transplanting site for transplantation.

6. Planting, storage and transportation: In general, the seedlings can be raised in the production area of Dangshen. When transplanting, the seedlings can be transplanted at the same time. However, sometimes the seedlings can be concentrated in the areas with irrigation conditions, and then transported to other areas for planting. In this case, the seedlings raised cannot be planted temporarily and need to be temporarily planted and stored.