Apocrine glands only start to move when they are affected by endocrine in adolescence, so body odor usually begins in adolescence and decreases or disappears in old age.
In addition to water, lipids, iron, fluorescent substances and colored substances, apocrine glands also contain a special odor substance.
The odor of body odor is produced by the interaction between unsaturated fatty acids produced by the decomposition of various bacteria in this part and smelly substances secreted by apocrine glands.
Suggestion: If it is body odor, you can choose Sister Xianglin? To improve.
Viola yedoensis (scientific name: Viola yedoensis), alias Viola, Viola glabra, etc. Perennial herb, belonging to Paris of Violaceae, has no aboveground stems and is 4~ 14cm high. The lower leaves are triangular or narrowly ovate, and the upper leaves are longer, oblong, narrowly ovate-lanceolate or oblong-ovate. The flowers are medium-sized, violet or lavender, with lavender stripes on the throat. The capsule is oblong, 5~ 12mm long, and the seeds are ovoid, 1.8mm long and light yellow.
Viola yedoensis is very easy to reproduce. Plant by plant, naturally sow and reproduce.
1 sowing
Plug seedlings? The seeds of Viola yedoensis are small, so plug sowing is generally used to raise seedlings. When sowing, the seeds can be evenly spread on the soaked bed soil by a small seed seeder or by hand, and then covered with fine soil screened by a fine sieve to make the seeds invisible. Sowing time is spring sowing in early and middle March. Broadcast in early August and autumn. After sowing, the temperature is controlled between 65438 05℃ and 25℃ for about one week.
Sow in the open space? The land should be leveled and watered thoroughly in August. After the water permeates, the seeds should be mixed with fine sand and scattered on the ground, and the seeds should be tightly covered for a week before they emerge.
2 ramet propagation technique
First, the green land will be ploughed and leveled with foot manure. For example, planting began in Miao Di in April, and the plant spacing was 10cm, and it was covered in June. The division time can be carried out in the growing season, but attention should be paid to shading in summer. If ramets are divided in spring, it will affect flowering, but transplanting in rainy season will be easy to survive and will not affect flowering in the next year. It is best for Viola yedoensis to reproduce asexually in rainy season. The effect of ramet propagation is faster. Under the same conditions, transplanting seedlings by dividing plants can delay seedlings, survive quickly and have a long green period. If the requirements for the greening effect at that time are not particularly high, try to use small and medium-sized plants for greening.
3 natural reproduction
Viola yedoensis has strong self-reproduction ability. Plant a seed every 5 meters in the planning area according to the method of dividing plants, let it fall with the wind without picking, and naturally reproduce about "Eleventh" after maturity, which can achieve satisfactory results.
After the seedlings grow fully, management should be strengthened, especially the temperature should be controlled to prevent the seedlings from growing in vain. At this time, the light should be sufficient. The temperature is controlled at 65438 05℃ during the day and 8℃ at night to keep the soil slightly dry. When the seedlings grow the first real leaf, they will start to divide the seedlings and move them. The roots should be stretched straight and the bottom water should be poured thoroughly. The daytime temperature is about 20℃, and the nighttime temperature is about 65438 05℃. Appropriate amount of decomposed organic fertilizer solution can be applied to promote seedling growth. When the seedlings grow to more than 5 leaves, they can be planted.
If the planting density is 40 large and medium-sized seedlings with leaves between 1520 /m2. The transplanting density of 5 10 leaves can be 50 plants /m2. In addition, it is found that transplanting with soil is faster and has higher survival rate than transplanting with bare roots. Therefore, transplanting with soil is appropriate.
40% growth period management
Viola yedoensis has strong growth resistance. Johnson & Johnson can topdressing organic fertilizer every 7 10 d in peak season without special management for a long time. It will make its landscape more effective. Pay attention to pulling out weeds during growth, generally do not topdress, and pay attention to drainage in rainy season.
Leaves injured by red spider can be sprayed with stone sulfur mixture.
The seeds of Viola yedoensis will crack and pop up quickly when they are dried after maturity. Therefore, seeds should be harvested after the capsule is erect and before cracking. In the process of drying seeds, attention should be paid to covering the capsules with screens to prevent the seeds from falling off. And then sieving, drying and preserving the seeds.