1. Plot selection: The use of protected land for planting lotus roots should be based on fertile soil, flat landform, adequate water supply, and lighter water in the construction of sheds. The quick-seepage plot can be laid with 6-8 silk plastic film under the soil tillage to avoid moisture infiltration.

2. Variety selection: The suitable varieties for planting lotus root in protected areas include E Lian No. 1 and E Lian No. 3, as well as local early-maturing varieties of four early and early five seasons.

3. Fertilization for soil preparation: Basal fertilizer should be based on organic fertilizer. The dosage per acre should be not less than 3 cubic meters. Fertilizer can be applied with 15-25 kg of ammonium phosphate or 50-70 kg of superphosphate per acre. Nitrogen fertilizer and potash fertilizer can only be used as top dressings. In addition, 3-5 kg ​​of zinc fertilizer and 1 kg of boron fertilizer should be applied per acre. This work should be completed before the Spring Festival.

4. Construction of sheds: Cultivation of lotus roots in greenhouses will be marketed early but at too high cost, and the benefits will usually be low. The use of greenhouses will be less costly, and the greenhouses will be preferred from north to south, with a length of 70 to 80 meters, and the width of the sheds will increase. Lotus grows better. For early maturity, the width of the shed should not be narrow, usually 6-8 meters. The shed should be completed before the end of February and the shed should be warmed.

5, sowing: When the soil temperature rose above 8 °C can be sown, the amount of 200 ~ 250 kilograms per mu is appropriate, the mother and child can be planted species. Seedlings should be planted by size, with axillary buds facing the shed.

6, water management: irrigation after sowing, the water depth should be maintained about 15 cm, this can not only inhibit weeds, but also make the temperature quickly promoted. In early April, when the emerging leaves emerge, the water level can be increased to 20-25 cm.

7, top dressing: greenhouse planting lotus root carp ammonium, urea and compound fertilizer containing urea are easy to cause burning seedlings, it is necessary to topdressing nitrogen fertilizer should be applied to the soil, and day and night ventilation for 3 to 4 days. After emerging from the leaves, lotus roots begin to take up roots to absorb fertilizers and fall into the lush growth stage, while the underground stems of lotus roots have a short growth period. Therefore, after the emergence of the leaves in early April, a large amount of fast-acting fertilizers should be used. 20 kg of urea and 25 kg of potassium sulfate can be used per mu. Urea should be applied, buried, potassium sulfate applied, and pay attention to ventilation. In order to avoid burning seedlings, urea can be replaced by fully cooked cake fat, chicken manure, or fertilizer diluted from the manure heap. The effect is also very good.

8. Harvesting: Small sheds covered with greenhouses can be harvested at the end of May. A single greenhouse can be harvested in mid-June. Before mining, you can touch hands and feet in the field to check whether you have reached the market. After being harvested once, it can be used to replant other vegetables. It is also possible to pick only large leeks without damaging the stems and leaves, allowing them to continue growing and topdressing with nitrogen fertilizers once again, harvesting the second crop from August to September.

9. Rotation of dry and flooded crops: the greenhouses were covered with shade nets and planted with celery after harvesting in mid-June. Harvested from late August to early October; then garlic seedlings were planted in the late October, harvested before and after New Year's Day, and can be harvested. It will increase the economic efficiency and improve the micro-ecological environment of the soil to realize the sustainable use of Putian.

Attenuated Vaccines (Live)

Influenza Vaccine, Live, Nasal, Freeze-dried is a cooperative project with the WHO, which has been included in Global Action Plan for Influenza Vaccines (GAP)[1]. Hundreds of millions of doses have been used in the world, and Changchun BCHT Biotechnology Co. has the exclusive right of production and

operation in China.

Intranasal spray administration, no injection and no pain

The vaccine is inoculated by nasal spray, equipped with nasal spray device, and only needs to spray once a year in two nostrils to prevent influenza.

Mucosal immunity + Cellular immunity + Humoral immunity

After influenza virus attacks human body, it widely exists in nasal cavity, respiratory tract and other mucosal parts, as well as in body fluids and cells.

Vaccination of Influenza Vaccine, Live, Nasal, Freeze-dried can quickly stimulate the triple immune response of human body, and carry out defense

against viruses in different parts:

·Intranasal administration can produce mucosal immunity (IgA antibody), which forms the first immune defense line in the nasal cavity.

·Produce humoral immunity (IgG antibody) to remove influenza virus from body fluids.

·Produce cellular immunity (T cells) to remove influenza virus from cells

3+N More extensive protection

The production strains are recommended and supplied by the WHO every year.

The vaccine can not only effectively resist the vaccine strain, but also produce cross immunity to other subtypes of influenza virus.

Produced with SPF embryonated eggs

SPF

The chick embryos for vaccine production comes from SPF (specific pathogen free) chicken flocks, so the risk of exogenous pathogenic microorganism

pollution is excluded.

Free of inactivator, split agent and preservative

High protection and fast antibody production

This is the first influenza vaccine in China that has been evaluated by the protection effect of etiology in clinical stage. The protective effect of phase III

clinical trial is consistent with the literature.

First, the immune barrier was formed in the nasal mucosa after LAIV vaccination. It has been reported that the antibody of nasal mucosa can be

produced in 3 days, which greatly shortens the time for vaccine to produce

protective effect.

Influenza Vaccine Freeze-Dried,Liquid Influenza Vaccine,Influenza Vaccine Live,Cinfluenza Vaccine Live

Changchun BCHT Biotechnology Co. , https://www.ccbcht.net