In the past, people only had to eat the vegetables grown in the season, but now it is different. Fresh vegetables can be eaten all year round. This is because the cultivation methods of vegetables have changed. For example, tomatoes have many cultivation methods. Greenhouse tomatoes, greenhouse tomatoes, etc. The following small series introduces you to the key points of tomato cultivation techniques in the solar greenhouse.
Variety selection
Medium and late-maturing varieties with low temperature, low light, disease resistance, fruit shape and color should be selected. The main cultivars include Baoguan, Jinpeng No. 1, Jinpeng No. 5, and Saint Cherry Tomato.
2. Cultivate seedlings
Usually planted in mid-August to early September, too late or too early will be affected by early spring or autumn delays. The seeds were soaked for 3 ~ 4 h, disinfected with 1% potassium permanganate for 10 ~ 15 min, rinsed with water and germinated. Most of the seeds were germinated and then sown on the nursery seedbed. After the sowing, the soil was covered with 1 cm thick. Strengthen the light during the nursery to avoid direct sunlight, and the temperature should exceed 30 °C to shade. 4 to 6 true leaves of seedlings can be colonized.
3. Suitable for colonization
The root system of tomato is developed, it must be deep ploughed 20 ~ 25 cm, and the organic fertilizer is applied 5,000 ~ 6 000 kg. In the middle and late September, the size is ditched and planted, the small row spacing is 60 cm, the large row spacing is 80 cm, and the plant spacing is 30 ~ 35 cm. Planted 3 000 ~ 3 500 plants, ridged after the planting, filming, pouring water once under the membrane.
4. Field management
4.1 Temperature management.
Temperature regulation is carried out by uncovering the agricultural film and covering, adjusting the size of the vent and the length of ventilation. The temperature in the daytime is about 25 °C, not more than 30 °C, the night temperature is above 10 °C, and the temperature is 14 °C ~ 17 °C. When the minimum temperature in the shed is stable above 15 °C, the greenhouse vents are all removed to increase the light.
4.2 Fertilizer management
4.2.1 Irrigation, cultivating, and seedlings. After the tomato is slowed down, the seedling water is poured, and after 3 to 4 days, the cultivating is carried out in time. The mid-late and late-maturing varieties are sown after the seedlings are sown, and the seedlings are immediately watered and the fruit is applied, and the compound fertilizer is applied with the water.
4.2.2 Topdressing. Generally, starting from the slow seedling, mainly urea and nitrogen, phosphorus, potassium compound fertilizer, combined with foliar spray fertilizer, divided into 4 times of topdressing, 10 kg after the slow seedlings; the first ear fruit began to expand when the application 20 ~ 25 kg; the first ear of fruit will be applied 10 ~ 15 kg per mu; the fruit surface is sprayed with 0.3% potassium dihydrogen phosphate or 0.2% urea.
4.3 Preserved flowers and fruits. 1 Strengthen cultivation management: cultivate strong seedlings, apply sufficient base fertilizer, appropriate seedlings, rational topdressing and watering, and actively prevent pests and diseases, etc., which will help reduce the drop of flowers and fruits. 2 timely use of plant growth regulators such as anti-fallin and 2, 4 - D treatment, with anti-falling spray, use concentration of 25 ~ 40 mg / L; with 2, 4 - D 15 ~ 20 mg / L coated handle .
4.4 Plant adjustment. The stems of tomato are semi-lignified and semi-propagated, and the supporting force is weak. When the plant grows to 30 cm, the bamboo stalk or sling is supported at 15 cm from the root to support the plant, and the vines are tied several times with the plant growth. Using double dry pruning, in addition to the main trunk, the side branches below the first ear fruit are selected as the result branches, and the main stem grows together, leaving 3 to 4 ear fruits, and the side branches are removed in time, and the lower old leaves and diseased leaves are removed in time. To facilitate ventilation and light.
5. Pest control
5.1 Virus disease. Spray 20% virus A wettable powder 500 times solution, or potassium permanganate 800 times solution, spray once every 8~10d, and spray 3~4 times.
5.2 Spot blight. Use 75% chlorothalonil WP 600 times solution or 70% thiophanate-methyl WP 1 000 times solution for alternate control, spray once every 7 ~ 10 days, continuous spraying 2 ~ 3 times.
5.3 Whitefly. Use 10% imidacloprid wettable powder 1 000 ~ 1500 times solution, or 50% phoxim emulsifiable concentrate 1 000 ~ 2 000 spray control.
The above is the introduction of the key points of tomato cultivation techniques in the solar greenhouse. Farmers who want to cultivate tomatoes in the greenhouse can do it all according to the above methods. Basically, the above is a comprehensive introduction to tomato cultivation. If you have other questions, welcome to comment. Everyone has a lot of discussion.
Sodium Hyaluronate is very important for skin because it improves moisturization, maintains skin resilience, and reduces damage in the lower part of skin when the skin is damaged. It also acts like lubricant by causing collagen, a main constituent of skin, to move smoothly in between cells.
But from the age of 25, Sodium Hyaluronate in human body will lose gradually, only remaining 65% of young skin at the age of 30, only 25% of young skin at the age of 50.
With the increase of the age and the loss of Sodium Hyaluronate, the skin will lose elasticity and luster, aging, wrinkles and relaxation will be generated gradually.
Sodium Hyaluronate is so water-friendly and it has functions of the best moisturizing factor and prevents diseases such as skin infections by preventing the penetration of external substances such as bacteria.
Therefore, it is regarded as an ideal "natural moisturizer" factor and widely used in cosmetics that suitable for different skins, climates and environments.
High molecular Sodium Hyaluronate can be formed breathable film on the surface of the skin, help the skin to lock moisture, and to prevent the invasion of bacteria, dust and ultraviolet, so that to protect the skin from damage.
Low molecular Sodium Hyaluronate, which is designed for better skin penetration, can penetrate into the dermis quickly, dilated capillaries slightly, promote blood circulation and metabolism, and so it has function of eliminating wrinkles, increasing skin elasticity and preventing skin aging.
Sodium Hyaluronate,Ha Sodium Hyaluronate,Moisturizing Sodium Hyaluronate,Hyaluronic Sodium Hyaluronate
Shandong Tiancheng Chemical Co., Ltd. , https://www.tianchengchemical.com