Seed sowing method of Codonopsis pilosula

Codonopsis pilosula likes warm and cool climate, and there are two common methods of seed direct seeding and seedling transplanting, but it is better to use seed direct seeding, such as half-shady and half-sunny slopes, slopes near water sources, slopes and second wastelands free of underground pests and perennial root grass, and seeds to choose new seeds. let's take a look at the sowing methods of Codonopsis pilosula seeds.

Sowing time of Codonopsis pilosula

1. Winter sowing: winter sowing is planted between "Frosts Descent" and "the Beginning of Winter". The seeds do not need to be treated in that year, but after rain and snow infiltration in winter, they emerge early, grow vigorously and have strong drought resistance in the second year. Because the seeds of Codonopsis pilosula are small and the soil cover is shallow, winter sowing in winter is easy to blow away the seeds in case of strong wind, resulting in the phenomenon of lack of seedlings.

2. Spring sowing: it is appropriate for spring sowing before and after "the Spring Equinox". The seeds need to be treated, select full and mildew-free seeds, put them into a cloth bag, put them in 40 ℃ warm water, then knead them for about half an hour, until there is no yellow water flowing out, take out the cloth bag, cover them with wet sacks, put them in a place of 25 ℃ and 30 ℃, and wash them with 40 ℃ water every morning and evening to keep them moist. 4 days later, when the seeds germinate, they can be sown.

Sowing method of Codonopsis pilosula

1. Strip sowing: in the finished border field, according to the row spacing of 15 cm to 20 cm, open a ditch about 1 cm deep, mix the treated seeds with fine sand, scatter them in the ditch, cover the soil flat, step on the soil, and cover with 1 cm thick fine sand.

2. Sowing: on the finished border surface, mix the seeds with 10 times fine sand soil, spread them evenly on the border surface, use iron rake to combine the seeds with the soil, then flatten the border surface, suppress it, and then cover it with 1 cm thick fine sand, which is about 1 kg per mu, and the party can also participate in corn intercropping, which can not only play the role of shading seedlings, but also as the support of the stems and vines of Radix Codonopsis, strengthen the field management, and achieve the double harvest of grain and medicine.

Seedling Management of Codonopsis pilosula

1. Intermediate ploughing and weeding: after sowing, the seedling bed is kept moist, and seedlings emerge in about 9 to 13 days (in case of drought, the emergence time is longer). When the seedlings grow 2 true leaves, the seedlings should be ploughed and weeded, and the soil should be shallow to avoid burying the seedlings and injuring the roots. Codonopsis pilosula seedlings should stop mid-ploughing and weeding, and weeds should be pulled by hand to prevent damage to Codonopsis pilosula seedlings.

2. Except for the covering: when the seedlings of Codonopsis pilosula have two pairs of true leaves and reach more than 1 cm, you should choose a cloudy afternoon to remove all the covers at once, or when the height of Codonopsis pilosula is 1.5 cm, remove half of the cover first, and then remove all the mulch. If there is more rainfall in the early stage of the mulch, the mulch is close to the ground and part of the mulch is rotten, and most of the seedlings can pass through the mulch, that is, there is no need to remove the mulch. Cover until the seedlings rise.

3. Reasonable inter-seedling: for the fields with dense seedling growth, it is necessary to carry out inter-seedling when the seedling grows 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 less than 800-1000 plants / square meter.

4. Fertilizer and water management: topdressing according to the situation of seedlings, urea and potassium dihydrogen phosphate can each be used to add 50 grams of water and 10 kilograms of water, spray on the seedling bed, keep the border surface moist before the seedlings are unearthed and seedling stage, and drain water in time when there is too much precipitation and stagnant water. water should be watered in time when there is a serious drought, and the soil should be covered with a small amount of fine soil (about 0.5 cm thick) on the seedling land before freezing to prevent soil cracks and damage seedlings in winter.

5, timely seedling: Codonopsis seedlings in the field winter, next spring soil thawing, before transplanting seedlings, pay attention to avoid root injury, the seedling method is to dig up the seedlings with three-toothed iron forks, and then gently turn down, pick out the seedlings, shake off the soil, dig up the seedlings according to 20% of the soil, tie them into 400g, 500g handfuls, put them in sacks or plastic woven bags, and transport them to the transplanting ground.

6. Planting, storage and transportation: in general, Codonopsis pilosula production areas can raise seedlings, and transplant seedlings while transplanting, but sometimes they can concentrate on raising seedlings in areas with irrigation conditions, and then they can be trafficked to other areas for planting. In this case, the seedlings can not be planted for the time being. False planting and storage seedlings are needed.