Watermelon seeds swell through water absorption, germinate, seedlings emerge, seed coats fall off, cotyledons expand, and the first true leaf (two leaves and one heart) are revealed as the germination period.
Watermelon seeds must first absorb water to germinate and make the seeds change from dormant state to germinating state. When the water absorption reaches 65% to 75% of the dry seed weight, the protoplasm of the storage material in the seed begins to change from gel to sol state, and nutrients The macromolecular state, such as starch, protein, fat, etc., is transformed into small molecular substances such as monosaccharides, amino acids, and fatty acids that can be easily absorbed to provide energy for the seed buds to unearth. In this process, if the water supply is too low, it cannot meet the needs of the internal physiological activities of the seeds, can not germinate normally, or even "dry buds"; too much water supply will make the seeds reach a supersaturated state, the seed coat has poor air permeability, and affect oxygen supply. Easy to cause rotten seeds.
Watermelon mainly consumes the nutrients stored in the seeds during the germination period, so the absolute weight (fullness) of the seeds and the storage life of the seeds have an important influence on the germination rate and the quality of sprouts. The viability of watermelon seeds decreases with the increase in the storage life of the seeds. Although the useful life of the seeds is 5-7 years, the germination rate of the seeds of 1 to 3 years is high and the germination vigor is neat.
The length of the germination period of watermelon mainly depends on the height of the ground temperature: high ground temperature germinates quickly, and low ground temperature germinates slowly. The ground temperature is between 15 and 20 ℃, and the germination period takes 7 to 13 days; when the ground temperature is 25 to 30 ℃, the seedlings can emerge within 3 to 4 days. When raising watermelon seedlings in the low temperature season in early spring, listen to and watch the weather forecast to ensure that there are 6-7 consecutive sunny days after sowing, and the shed film is tightly warmed; fire channels and grounds should be used in severe weather such as cold currents, rain, snow, and haze. Heating equipment such as hot wire and hot blast stove raises the ground temperature so as not to affect the emergence of seedlings due to long-term low temperature and high humidity.
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Flavonoid powder is a class of compounds with various biological activities. Here's a breakdown of their categories:
Flavonoid powder can be mainly divided into the following categories:
Flavonols: such as quercetin, kaempferol, etc., mostly found in vegetables, fruits and tea, with antioxidant, anti-inflammatory and other effects.
Flavonoids: such as apigenin, widely distributed in plants, have certain benefits to the cardiovascular system.
Flavanones: such as hesperidin, etc., with antioxidant, blood lipid and other functions.
Isoflavones: such as soy isoflavones, which are mainly found in legumes, have important implications for women's health, such as regulating estrogen levels.
Anthocyanins: such as centaurin, geranium, etc., make the plant show a rich color, with strong antioxidant activity.
Different types of flavonoid powders differ in structure and biological activity, and together they play an important role in human health.
In general, flavonoid powder is relatively safe at normal doses.
Flavonoid powder has certain antioxidant, anti-inflammatory and other biological activities, which may be beneficial to human health.
Flavonoids Powder,Pueraria Mirifica Powder,Mulberry Leaf Extract,Citrus Aurantium Extract
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