Ephedra cultivation techniques

Use seeds and roots. When seeds are propagated, care should be taken to ensure that they are full of mature seeds, with a 33-centimeter row spacing and 0.33-0.67-cm cover soil. Keep the soil moist before emergence. About 15 days after sowing, seedlings emerged. After seedling emergence, no seedlings were needed. However, attention should be paid to frequent loosening of grasses. It is more convenient to propagate the ramets, choose the Gaozao plot, make a flat ridge, and in the spring, when the old plants have not been able to issue new shoots, the plants will be excavated. According to the size of the tussocks, each tussock can be divided into several strains. Centimeter planting. After planting, cover the root buds and compact the surrounding soil. Before planting, apply base fertilizer and drains to prevent drowning during the rainy season. Ephedra rhizomes have strong ability to extend, and the plant spacing can be kept wider when planting, and the ground can be covered 1-2 years after planting. Seedlings should be properly watered, do not make the soil too dry, affect the survival of seedlings, seedling height 6.7 cm, should not be too much watering, generally in the early spring every year before returning to green, per acre applied fertilizer 1500-2000 kg. If any weeds are in the field, be careful to remove them at any time.

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Human chorionic gonadotropin is a hormone for the maternal recognition of pregnancy produced by trophoblast cells

Human chorionic gonadotropin (HCG) is a glycoprotein secreted by trophoblast cells of the placenta And β dimer proteins. The molecular weight of glycoprotein hormone 36700, A. Pituitary, FSH, follicle stimulating hormone, LH (luteinizing hormone) and TSH (thyroid stimulating hormone) are basically similar, So they can cross-react with each other, while the structure of β subunit is not similar. In mature women, the fertilized ova move to the uterine cavity for implantation and form embryos. In the process of development and growth into the fetus, the placental syncytiotrophoblast cells produce a large amount of HCG, which can be excreted into urine through the blood circulation of pregnant women. Serum and urine HCG levels rise Rapidly from 1 to 2.5 weeks of gestation, reaching a peak at 8 weeks of gestation and dropping to moderate levels at 4 months of gestation, which remain at the end of gestation. At present, the commonly used detection methods are: latex aggregation inhibition test and hemagglutination inhibition test; Radioimmunoassay (RIA); Enzyme linked immunosorbent assay (ELISA); Monoclonal antibody colloidal gold test

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