The quality of transplanting seedlings is one of the key factors in the quality of transplanting seedlings. Therefore, it is extremely important to manage rice transplanting seedlings.
1, timely removal film hardening seedlings. 4-6 days after sowing, normally normal Qimiao. At this time, remove the film and hardening the seedlings. Generally, open the arching membrane at about 10:00 am to 11:00 am on sunny days for ventilation, and close the membrane at about 6:00 pm to facilitate the evening insulation. After 4-5 days, the two arches are opened in the morning and the arch membrane is no longer closed in the evening. The small oysters are gradually adapted to the outside environment in the evening. After 4-5 days, the seedlings can be peeled off when the leaves are in two leaves. The general principle that should be grasped on the time of uncovering the film is: Select 4-5 o'clock in the sunny afternoon. When the film is uncovered, it must be filled with flat ditch water. It is better to just flood the eel, and it is not possible to submerge the tip of the eel so as to prevent the death of seedlings from hypoxia. .
2, scientific management of water. Based on the principle of “wet and dry alternationâ€, the management of the bed soil is mainly in the early stage of Putian, and the disc soil is not whitened. In sunny days, the seedlings are not curled and water is lacking. The method of replenishing water can concentrate the ditch water in Putian, and water can be sprayed in a small area sooner or later. Control the water for seedlings three days before transplanting. The method is to keep the ditching water on a sunny day, drain the ditch water on a cloudy day, especially before the machine is plugged in, and control the gap to control the water to prevent the water content of bed soil from being too high. Impact from the machine and machine plug.
3, timely fertilizer. Seedlings are lighter in leaf color at the 1st heart, and are sprinkled with 7 to 8 kg of urea and 1 to 7 kg of urea per 25 plates. Sprinkle with clean water after the fertilizer to prevent fertilizer damage. The second is to give marriage fat: generally 3-4 days before transplanting fertilization 1 times, according to every 25 with 1.5 male two urea mixed with water 10 kg in the evening spray, spray fertilizer spray water wash seedlings.
4. Pest control: There are mainly control objects, such as Laodelphax striatellus and aphids. For some diseased varieties of stripe blight, it is necessary to do a good job of prevention and control of SBPH. The method is: after the film is uncovered, timely apply 5% Ruijinte 30 ml plus 80 kg water per acre Dianchi. For diseases such as seedling blight, the Mutuo field can use 500 grams of 65% enemies and pour 500 kilograms of water. For high temperature injury and other types of frozen seedlings, “802†(half a barrel of water, “Hui Manfeng†200ml/mu) can be used for foliar spraying, which can achieve better results. Adhere to the drug transplant, generally 1-2 days before planting with "5% Rui Jin special" 30-50ml, the control effect of Laodelphax striatellus, aphids, etc. is better.
5. What are the reasons for the size of seedlings in paddy fields? How to avoid? (1) The seedlings cover the soil unevenly and the thick soil causes boring species, resulting in relatively slow emergence and lagging growth. (2) It was the rain that could not be eliminated in time during the cover film, resulting in plasters and affecting seedling growth. (3) It is the unevenness of the seesaw. When the water is relatively high, it is not water when it is on the water. It is in a state of water shortage and grows slowly. The solution is to make the board in Sheung Shui to ensure that the board surface is straight, the cover soil should be even, and the water should be removed immediately after the rain.
6. What are the reasons for uneven seedlings? (1) uneven planting, high density seedlings high seedlings; (2) fertilizer, injury and burns; (3) film plaster; (4) disease dead seedlings (blue, dry, mostly occurred before and after the three-leaf period;).
7. Causes, symptoms and main preventive measures of common blue and yellow dead seedlings in Putian period: Due to the high density of rice seedlings transplanted in rice, the quality of seedlings is relatively poor and the stress resistance is weak, especially at the 2-3 leaf stage. Before and after weaning, it is easy to cause dead (green) yellow seedlings after chilling. Green dead seedlings are seedlings that are not timely watered after being exposed to low temperatures or storms, causing the seedlings to lose water and die. This is an acute physiological disease that usually occurs as a whole. The diseased seedlings begin to wilt from the young leaves and become vigorous, and then the whole The strain died. After the death, the leaf color was dark green (blue and dry), but the base of the seedling was not easy to pull off, and the roots seemed to be hot. Yellow dead seedlings are dead seedlings that occur after the seedlings are slowly victimized at low temperatures. They are chronic physiological diseases that often occur in clusters. From the tip to the base of leaves, from the outside to the inside, from the old leaf to the young leaf, Gradually yellowing and death, the base is rotted due to pathogenic parasites, and it is easy to pull off. The main preventive measures: In the case of low-temperature cold in Putian period, pay attention to irrigation and heat preservation. If the wet and cold weather lasts for a long time, the water temperature, soil temperature, and temperature gap in Putian need to be gradually reduced to adopt the method of diligent irrigation or daily irrigation. To increase water temperature and supply oxygen to prevent dead seedlings. Cold storms should be timely flooded with seedlings, ease the temperature difference, and gradually adjust to fine weather. The water should not be drained immediately when the weather is fine, so as to prevent imbalance of water balance in the seedlings, resulting in physiological water loss and the occurrence of blue-green dead seedlings.
nebulizer medicine:nebulizer at home:nebulizer treatment:nebulizer for kids:best nebulizer machine:best nebulizer
Shenzhen Urion Technology Co., Ltd. , https://www.urionhealth.com