"Focusing a good, parboiled rice with good seedling yield" is the key to the success or failure of rice mechanization. Therefore, it is very important to manage rice seedlings during planting, and we must grasp the following technical points. 1 Sealing film covers seedlings of rice germinated by seedlings. After sowing, they need to be subjected to a period of high temperature and high humidity to establish seedlings. The emergence of seedlings can be neat, and double membrane seedlings generally adopt the method of capping and covering seedlings. The operation should pay attention to two points. It is to grasp the cover grass thickness, thickness and evenness, to avoid burning at high temperatures at noon; the second is to remove the water on the cover film in time after the rain. In order to avoid the film area of ​​water, in addition to the cover of the wet straw, heavier, local pressure, resulting in stuffy rotten buds, affecting the whole seedlings. 2 Time-saving seedling filming time should not be too long, generally about 2cm in the seedling unearthed, the first full leaf is extracted (4~5d after sowing) to remove the film and consolidate the seedlings. If the covering time is too long, it will be easy to burn seedlings in case of high temperature and fine weather. Unveiling principles: The evening exposing on a sunny day, the morning exposing on a cloudy day, the light raining before the rain, and the heavy rain after the rain. When the film is peeled off, it can be filled with water once or in bed. 3 Scientific management Before the three-leaf stage of seedlings, maintain the ditch water, so as to be mainly wet, to achieve the purpose of adjusting the water with water, adjusting the fertilizer with water, adjusting the temperature with water, and protecting the seedlings with water. Under normal circumstances, keep the bed soil moist and not white, water and gas, if the sunny days at noon seedlings roll leaves to be filled with thin water protection seedlings, rain drained gutters water, 3 to 5 days before transplanting water control seedlings . 4 The timely application of weaning and weaning fertilizer should be carried out according to specific conditions such as soil fertility, age, and weather conditions. It is generally applied at one leaf and one heart (7-8 days after sowing). Dehumidified manure is used for 10 grains of water per mu, and 20 tons of water or 500 kg of water is mixed with urea 5.0-7.0 kg. The seedlings will be poured during the evening. Bed soil fertility may not be applied, wheat seedlings in order to prevent the seedlings are too high, need to see the seedlings fertilizer, fertilizer can be reduced appropriately. 5 Doing a good job of pest prevention and control The paddy fields mainly include rice thrips, rice planthoppers, seedling blight, and locusts. Putian period should pay close attention to the occurrence of diseases and insect pests, and prevent and treat the disease in a timely manner. In recent years, the occurrence of rice stripe disease has been increasing year by year. It is imperative to do well the prevention and control of SBPH. We use “Imidacloprid†(active ingredient) 2g plus 80kg water to spray at one leaf and one heart, and can be used for multiple prevention and control as needed. 6 See the seedlings with good seedlings and strong seedlings: Seedling height 12 ~ 17cm; seedling age 15 ~ 20d: leaf age 3.5 ~ 3.8 leaves, seedlings very green; stem base rough and elastic; roots knot firmly, lift Not scattered, packing with soil thickness 2.0 ~ 2.5cm, thickness consistent, more than 10 per plant white root; 1.5-3.0 per square centimeter seedlings. In order to achieve the above indicators, while improving the quality of sowing, and doing a good job in the management of fertilizers and water in the middle and early stages of Putian, it is possible to apply the boosting agents according to weather and seedlings in the second leaf stage. If the temperature is high, the rainfall is high, and the seedlings grow faster. In particular, the seedlings that cannot be transplanted in proper time, 15% “Paclobutrazol†WP 50g per mu, and 1∶2000 times diluted water (Remember If the amount is too large and the spray is not uniform, such as bed soil fertilization, it is necessary not to use the “drought-enemies and drought-strength agents†to retard the growth rate of the plants, and at the same time to promote lateral growth and increase the dry matter content of the seedlings. Source: "China Rural Well-off Technology"
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