After some years in the south, some areas in the south began to prepare rice seedlings. Therefore, the Huinong School organized the five main points of rice seedlings. The following is a detailed list for farmers to refer to.
Rice seed treatment
In order to improve the germination rate of rice, it should be sun-dried before sowing, and then use 1 ml of 100 g (25% prochloraz) or 15 g of filaria (16% prochloraz), and add 5 to 6 kg of water to soak 5~ 6 kilograms of rice seeds, plus 10 grams of 10% imidacloprid wettable powder per 5 to 6 kilograms of water, soaked for 72 hours, immersed in night, and then germinated sowing, can effectively prevent and cure disease, dry-point nematode disease and early gray planthopper .
Determining the breeding period
Rice heat preservation dry seedlings, seedlings are planted after the temperature has stabilized through 5 °C-6 °C (the temperature is increased to 12 °C after covering the mulch film and the shed film). Heilongjiang Province generally does not broadcast in May, and does not broadcast in May. The good sowing period is from April 15th to 25th. It is also possible to determine the sowing date by the number of days of the screening period. The Chinese medicine is sown 30-35 days before the sowing, and the seedlings are sown 35-40 days before the sowing.
Nursery water management
If it is dry nursery, it should be poured in a timely manner to prevent dead seedlings; keep the seedlings moist before the 3rd leaf stage of rice seedlings, promote the rapid growth of roots and leaves; after the 3 leaf stage, mainly control water and dry pipe, do Do not water the leaves without watering, and do rain in the rain to stop the fields. Do not keep the deep water layer for a long time in rice breeding.
Fertilization of rice seedlings
If the amount of fertilizer required for dry nursery seedlings is relatively small, in the case of fully fertilizing the seedbed, it is generally unnecessary to apply top dressing during the seedling stage, but the fertilization is not good, the bottom fertilizer is insufficient, and the yellowing of the field is required to be applied in time. Quick-acting nitrogen fertilizer, applying 10~20 kg of urea per acre, and timely watering to prevent fertilizer damage. In the water-breeding seedling stage, the amount of fertilizer required is relatively large, and the amount of topdressing is relatively high. It is required to apply a small amount evenly to prevent burning of seedlings.
Pest Control
Before the sowing of rice, use 48% of chlorpyrifos EC and 1kg of 35% phoxim microcapsules per acre, and apply it before the land preparation in the nursery field; after the rice is planted, use 100g of 40% phoxim emulsifiable concentrate to feed the bait. In the evening, it was spread around the fields to control underground pests.
Control rice blight and bacterial wilt after rice seedlings and seedlings, choose one of the following two formulas per acre, add 50-75 kg of water spray. Weeding in Putian can be carried out from 2 to 1 heart period to 4 leaf stage, with 30 to 40 grams of benzyl dichloride (32% bensulfuron- quinclorac) per acre, and 30-40 kg of water is sprayed. Drain the water before application, and take 2 to 5 cm of water layer 1 to 2 days after the drug, and keep it for 5 to 7 days.
Control pests and diseases can use 25% imidacloprid wettable powder 40g plus gram gram gram 250ml or Jiajie (50% chlorobromoisocyanuric acid) 30g plus San Fushun (6% albendazole carbendazim) 100 grams, add water 50-75 kg spray, 5 to 7 days.
Precautions for emergence of dry nursery
Temperature management: In order to ensure early germination, early emergence, and emergence of seedlings, dry nursery should be done before the emergence of seedlings. The measure is to cover the agricultural film, and the damaged film will be repaired in time. Frequently, the dust and snow on the agricultural film are destroyed, the transmittance of the agricultural film is increased, and the temperature is increased. When there is a cold wave, apply the film to cover the heat preservation of the grasshopper.
Moisture management: Insufficient and uneven water in the bed soil will affect the emergence and seedlings. Therefore, the soil moisture of the bed of the seedbed should be checked frequently. If the topsoil is dry and whitish, it should be replenished in time.
Prevention of rodent pests and insect pests: The anti-rat method is to apply zinc phosphide on the bed surface, that is, 0.5 kg of zinc phosphide plus bait (corn, sorghum, etc.) 25 kg. After mixing, sprinkle it on the bed surface to prevent 5% use. Zinc-phosphorus 0. 5 kg plus cooked high-phosphorus 50 kg, mixed and sprinkled on the bed, a small amount of each bed can receive the control effect. When the seedlings are needled and green, the mulch covered in the seedbed is removed in time, and the high temperature burns the tip of the seedling.
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