Drainage and flood control; scorpion damage symptoms due to long-term waterlogging, soil anoxic, part of fibrous root rot, resulting in the tip of new shoots shrink, young leaves yellow, old leaves are gradually dark yellow.
Immediately after the occurrence of plant damage in open field plants, loosen the soil and stop watering and fertilizing. Normally, the smoothing work of the planting beds should be done to avoid accumulation of water. If conditions allow, plant a rain shelter before the rain, or cover the plastic sheet on the plant bed and remove it after the rain. All kinds of fruit trees have different responses to leeches. Evergreen fruit trees are more resistant to lychee, deciduous fruit trees are more resistant to Chinese wolfberry, persimmon and other Chinese pears, and the most resistant to pods are peaches and figs. The citrus has moderate resistance to turgor, and the pome fruit tree has stronger resistance to turf.
The simplest method for potting plants is to move the potted plants into the room before the rain. For plants that have been damaged, they should be removed from the pot and placed in a cool place to allow them to quickly breathe and lose moisture. At the same time, they should be sprayed with water to protect the leaves. After the restoration, they should be put on the basin again. The most fundamental way to waterproof potted plants is to clear the drainage holes. Pay attention to the drainage layer when putting on the basin. Always keep the drainage holes unobstructed. Do not allow water to accumulate after the rain. Water is not visible in the basin. Put potted flowers in a timely manner to remove stagnant water or remove and shelter from rain. Orchids, asparagus and other flowers with good aerodynamicity should also be carried overhead to facilitate drainage. Porcelain basins, glazed pots, ceramic pots, plastic pots, and other non-porous basins that are poor in breathability and water permeability are generally not suitable for the cultivation of autumn roots, bulbs, and fleshy rhizomes with poor moisture resistance.
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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