Main cultivation techniques of New late Japonica Rice Variety Ning 81

1. Sowing at the right time and transplanting at the right time. Before sowing, the seeds were soaked with soaking seed Ling or "402" solution to cultivate single-cropping late rice. The sowing date was June 5-15, the seed consumption per mu was 2.5-3.0kg, the sowing rate in seedling field was about 30kg per mu, and the seedling age was about 25 days. It was planted late and the sowing date was June 25-30. The amount of seed used per mu is about 3.0kg, the sowing rate of seedling field is 25-30kg per mu, and the seedling age is 25-30 days. After planting or throwing seedlings at night, the seeds were sown around July 5, the seed consumption per mu was 3.0-4.0kg, the sowing rate in the seedling field was 35-40kg per mu, and the seedling age was 15-20 days.

2. Uniform and close planting to ensure the number of seedlings. For single cropping late rice, planting 1.8-20000 clumps per mu, basic seedlings 50-60 000 seedlings; continuous cropping late rice cultivation, 2-24000 clusters per mu, basic seedlings 8-100000 seedlings; throwing seedlings 80-90 plates per mu, basic seedlings 8-100000 seedlings.

3. Apply sufficient base fertilizer, early topdressing fertilizer, suitable panicle fertilizer. The total fertilizer amount is 12-14 kg per mu of pure nitrogen per mu, 10-12 kg of double-cropping, 25kg of calcium superphosphate and 7.5-10.0kg of potassium chloride. According to the growth of seedlings, panicle fertilizer should be applied to increase panicle type and give full play to the advantage of large panicle. Extra-root topdressing such as potassium dihydrogen phosphate should be sprayed at the first heading stage in order to enrich grain filling and increase 1000-grain weight.

4. Scientific water slurry management. After planting, turning green is shallow water irrigation, and when the total number of tillers reaches 85%, 90% of the seedlings are placed in the field to control the seedlings, in order to promote strong tillers and promote roots and improve lodging resistance. Dry and wet alternately after heading, in order to enrich the grain filling, reaching the green stalk, the grain yellow, the living stalk to the old.

5. Do a good job in pest prevention and control. Attention should be paid to the prevention and control of rice thrips in the seedling field. Honda should pay attention to the control of stem borer and leaf borer in the early growth stage, sheath blight in the middle stage, large panicle type and dense spike in Ning 81, and pay attention to the control of gray rice lice and aphids in the later stage. In case of typhoon and rainstorm during childbearing period, we should pay attention to prevent the occurrence of bacterial blight.