Rice seedlings technical advice
First, strong standards 1. Machine-planting seedlings: The seedling age is 15 to 18 days, the leaf age is 3.2 to 4.0 leaves, the seedling height is 12 to 18 cm, and the number of white roots is 10 or more. The roots are well compacted and free of pests and diseases. 2, cast disc throwing seedlings eel: 18 to 22 days of age, leaf age of 3.5 to 4.2 leaves, seedlings with eel rate of more than 30%, seedling height of 10 ~ 12cm, white roots, not rooting, dark leaves, no pests and diseases. Second, seed preparation 1. Pre-planting sun seeds: Choose sunny weather, place the seeds on a plastic bag or plastic (10270, 25.00, 0.24%) woven bag (should not be placed on the cement site), evenly spread the sun type 1~2 Days, it is necessary to turn several times a day to ensure that the seeds are heated evenly to increase the germination potential and germination rate of the seeds. 2. Select seeds: Wash the seeds with water to remove empty rice floating on the water. 3. Seed soaking: The seed agent treatment can effectively prevent and treat diseases such as rice bakanae, dry-needle nematode disease and stripe leaf blight. The method is: 17% killing? Ethicic acid 15g grams of fresh water 3-6kg, immersed rice seeds about 3-5kg, cover light immersed 48-60 hours, and then remove the rice direct germination sowing. 4, normal temperature germination: Japonica rice seeds soaked in water after the absorption of water chest, the general can be sown, you can also grow buds at room temperature, we must pay attention to maintain humidity, promote seed buds, roots long, uniform. Avoid warming germination, so as not to damage the species damage bud phenomenon. Third, the appropriate sowing The appropriate sowing time and the appropriate delay in the sowing date can effectively avoid adverse weather effects and reduce the damage caused by SBPH, which is conducive to nurturing young age. Plastic japonica cultivars such as Yangjing 4227 can be sown on May 18~22. Machines can be planted on May 20~28 for sowing, and they can be planted on May 15~20 for dry nursery and May 10~12 for wet larvae. Day sowing; conventional rice seedlings suitable for sowing is generally sown on May 5 to 10 days. Fourth, fine to do seesaw 1. Machine-planting and seedling cultivation: Choose fertile vegetable garden soil and paddy field soil for autumn ploughing, winter turning and spring hoeing, sifting through a sieve with a pore size of 4 to 6 mm, and prepare 120 to 150 kg per acre of field for fertilizing; For the first 7 to 10 days, mix the 0.6 kg of seedlings for every 100 kg of bed soil, mix thoroughly to make nutritious soil, and generally the amount of soil for each dish is 3.5 to 4.0 kg. According to the ratio of 1:80 to 100 in Datian, it is sufficient to reserve Dianchi Lake, and 25 to 28 pieces of Daejeon's Daejeon floppy disk are used to provide enough plates and other materials. 8 to 10 days before sowing, soaked in flats in Sheungshui, Swelling, and set up a ditch to make a plate. The width of the surface is 1.4m, the width of the groove is 20~30cm, and the depth of the ditch is 15~20cm. After the field tillage, the soil shall be “flat, straight, light, and realâ€. , Flat; height difference is not more than 2.5cm; straight, neat and tidy plate vertical edge; light, board no residual debris; in fact, the sinking board is not sinking feet. According to the platter, about 150 grams of sowing paddy in each dish of conventional rice is sown. Spread seed soil evenly after sowing, and cover the thickness of the soil to cover no buds. Note that nutritious soil with nutrient cannot be used as cover seed soil. Immediately cover the membrane and lay a layer of straw over the membrane to prevent burning of sprouts. 2ã€Plastic tray throwing seedlings: fill the bed by 1:35, and apply enough organic fertilizer, dry tillage, ripening the soil, and make the seedlings blank 2~3 days before the falling valley. The seedbed is required to be 140cm wide. 25cm wide and 20cm deep. May 18 to 22 sowing, Mu Datian species 3.0 ~ 3.5 kg, ready to sell about 60 plates, each broadcast sowing net species of 50 to 55 grams. After the seesaw blank is completed, 30-35 kg of special fertilizer for each mu of plastic seedlings is used as the base fertilizer, evenly sprinkled on the tarpaulin, and shallowly ploughed into the soil 3~5cm. Using the "two-stage grouting method", the first grouting, pouring holes, pouring a little sediment and then pouring the second slurry, reaching the hole depth of 80 to 90% when the leveling, falling valley, after a complete removal of the mud surface , Sakai isolation layer, cover film insulation and rain, grass cover film, anti-sunny high temperature burning seedlings. 五ã€Putian Management 1. Water slurry management: machine transplanting seedlings, planting ditch water after sowing, keeping the disc wet before removing the film. From the time of film removal to the 2-leaf stage, wet irrigation is the main method. Gully ditch water is flushed until fresh water is left to dry naturally, which is conducive to the growth of seedlings. Do not apply water for a long time or keep it dry. This will affect the rooting and normal growth of the seedlings. About half a day before the machine was inserted, the semi-trenches were watered to enhance the resistance of the seedlings. The plastic tray throws seedlings and leaves, and leaves the leaves until the 1 leaf and 1 heart period to keep the surface moist. The 1.5 to 3 leaf phases are mainly made of shallow water and moist. Afterwards, the dry tube should be avoided and the water layer should be avoided to prevent the root from picking up.秧, throwing 秧. 2, timely fertilizer: Putian period application of Zhuang agent generally do not need to fertilize, such as local emergence of yellow seedlings, can make up the dilution of the decomposed human fecal urine; planting (throwing) 2 to 3 days before the application of good delivery fat. 3. Prevention and control of pests and diseases: In the field of Putian, the prevention and control of pests and diseases such as Laodelphax striatellus, rice thrips, rice-rice weevil, aphids, etc. are mainly carried out. 2 to 3 days before transplanting, all Putian should use a single drug to take the drug with Shimoda. 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