The quality of tomato seeds depends mainly on seed plumpness, germination rate, germination potential and seed purity.

Fullness is the fullness of the seed. It is generally expressed in thousand grains, which is the mass (grams) of 1000 seeds. The larger the grain weight, the more full the seeds are. The average tomato seed weight is about 3.1 grams.

Germination rate refers to the percentage of germinable seeds in the sample seed. The germination rate of tomato seeds requires more than 90%.

Germination potential refers to the percentage of germinating seeds that account for the test seed within the specified number of days. It is a quantitative indicator of seed germination rate, uniformity and concentration of germination. The tomato seed germination potential was measured for 5 days.

Seed purity refers to the number of strains that meet the characteristics of this variety as a percentage of the total number of identified plants. The purity of tomato seeds requires more than 95%. Hybrids are divided into primary and secondary species. The purity of the primary seed is not lower than 98.0%, and the secondary seed purity is not lower than 95.0%.

High Flow Nasal Cannula

High flow oxygen therapy (HFNC) is a kind of oxygen therapy that directly transports a certain oxygen concentration of air oxygen mixed with high flow gas to patients through a soft nasal cannula. Also known as transnasal high flow oxygen therapy, high flow humidification oxygen therapy. HFNC has unique physiological effects: Constant oxygen concentration, Good effect of temperature and humidity, To flush the dead space of the nasopharynx, Give some positive airway pressure, Good comfort.

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