Field management techniques and late rice breeding in the early and middle stages of early rice

I. Field management techniques in the early and middle stages of early rice

1. Pest control. In the early stage of early rice production, there was too much rain, insufficient light, slow growth of seedlings, and delayed harvesting of early rice. The sheath blight and rice blast were more serious. Therefore, in the strategy of pest control, we should focus on the prevention and control of rice sheath blight and rice blast. . The specific application method is recommended to prevent the disease with tebuconazole, azoxystrobin (he technology) and tricyclazole before the break; use a chlorfenapyr (ridge song) to control aphids; use alpyridylpyrrolidone ) Control rice planthoppers. The field of the leafhopper has occurred, and it is recommended to spray the rice glutinous rice (Fuji No. 1) once after the ear.

2. Water management. The principle of water management is to implement “deep irrigation at the heading stage, alternating wet and dry management during the filling stage, and straightening the water 7 days before harvest”.

3. Harvest at the right time. When the grain maturity reaches 85%, harvest with a harvester to reduce rice waste and speed up the harvest.

Second, late rice breeding production technology

1. The amount of seed used in mu. It is recommended that 7.5 kg of conventional rice and 2.5-3.0 kg of hybrid rice.

2. Sowing time. It is recommended to sow it around June 25th. The specific date is determined by the early rice harvest time and the late rice safety and the late rice age.

3, soaking seeds and germination. In the soaking, the seeds were sterilized by soaking seeds with ampicillin 2000 times, and the rice seedling disease was controlled. The soaking time was soaked in conventional rice for about 24 hours; the hybrid rice was soaked for about 12 hours; the germination was carried out by the conventional method of "three from three falling".

4, strong seedlings and insects. After the seeds are broken and white, the paclobutrazol and Ruisheng seed dressing are used to enhance the elasticity of the ageing, promote tillering, and control the rice thrips. The specific method is 1 g of paclobutrazol mixed with 1 kg of grain, 5 g of Yuesheng mix 10-15 kg of seed valley. After mixing the paclobutrazol and the sharp-breasted white-browned white grain, you can plant it.

5, Putian preparation. The ratio of throwing the fields to Datian is 1:20; the machine transplanting is 1:60 to prepare the polders, and the farmland will be ploughed one week before planting, applying 15 kg of compound fertilizer per acre, and the fields will be leveled 3 days before sowing.

6, precision seeding, floppy disk throwing. 100 acres of floppy disk per acre, machine cutting seedlings. 40 pcs of 4*7 inch nursery hard drives per acre. When planting, it is required to spread evenly, and after the sowing, the mud will go to the valley.

7. Putian management. Before the emergence of seedlings, it is strictly forbidden to pick up water in the tray to prevent high temperature boiled buds. When the seedling bed is dry after emergence, the horse water can be poured in the evening. The seedbed is forbidden to be used for 4-5 days before transplanting, which is beneficial to the seedling packing and easy to transplant. .

8, the application of the drug. 5 days before transplanting, kill the seedbed weed and apply a long-acting drug; it is recommended to use penoxsulam (Taojie) 40ml + flubendiamide (Range) 4.5g + tebuconazole. 5 g of fat (he technology) was sprayed.