Rice Dry Raising Technology in Chongqing

Dry rice seedlings are a practical technology for disaster relief and production increase in the promotion of rice production in our city. One of its benefits is to raise eucalyptus on dry land, with good effect of heat preservation and warming, and the safe sowing date can be 7-10 days earlier than that of paddy wet seedlings, which is favorable for early transplanting to avoid high temperature and drought in the spike period, and to seize high rice yield. The second is to foster the development of a strong, strong, strong root system, with the same extension of the leaves, enhance the seedling quality, lay the foundation for high yield rice. The third is that dry seedlings return to green after transplanting and planting soon, early tiller, will help improve the rate of success, and promote rice production. Fourth, it is convenient to carry out the cultivation of dry land, and it is not affected by the cold of early spring in the field of water-logging. It has improved the working environment and reduced the labor intensity of childbirth. The technical points are as follows:

1. Choose a good variety

The hybrid rice varieties with high quality, high yield and stability, strong resistance and suitable growth period were selected; the hybrid rice varieties with strong regeneration ability and high yield and stable yield in two seasons were selected in the suitable area of ​​ratoon rice. Select 1 kg of seeds for sun drying and pharmaceutical disinfection, soaking and germination to the powder mouth (the coated seeds are not disinfected and impregnated with germination).

2. Appropriate early sowing

When the local daily average temperature is stable at 8°C, grab the cold tail warmer and sow the seeds. The general western Yunnan area and the central and northern Yunnan provinces and the shallow mountain valleys below 400 meters above sea level are sown in late February and early March. The suitable area for ratooning rice is broadcasted before March 5th; the middle and middle reaches of the Yunnan province are 400-800 meters above sea level. The planting will be carried out from mid-March to late March. The areas in the southeastern Yunnan, central Yunnan, and northeastern Yunnan will be planted at an altitude of 800 meters above sea level. They will be planted from late March to early April.

3. Seedbed selection

Choose a flat terrain, sunny leeward, deep and fertile soil, loose ventilation, drainage convenience, the soil was weakly acidic to neutral vegetable garden or dry loam soil. Seedlings prepared according to seedling specifications, cultivation of seedlings per acre seedlings transplanted field preparation 8-10 square meters; seedlings Mu seed preparation bed 12-14 square meters; large seedlings Mu seedbed bed preparation 16-18 square meters. Generally, there are water sources to ensure that the winter leisure field where the labor force is not tense selects the small seedlings; the small spring field where water shortages and labor force are tight have the choice of breeding large seedlings.

4. Seedling production

According to the 2m hatchback preparation, the car's net width is 1.4-1.5m, and the car height is 0.25m. The car surface is flat, high and low, no dents, and no debris. The seedlings are surrounded by drainage gutters, which are finely owed and the bed soil is like "sponge-like". The hands are pressed into a group and the mud is not sticky.

5. Application of strong agent

When the seedbed is less fine and flat, use 1 kilogram of dry maggots for special use of dry maggots, add 1 kg of urea and 20 kg of sieved fine soil and mix well, spread evenly on the surface of the seedbed, and fully mix it with the topsoil with a rake. Pouring enough water to complete bed soil disinfection, acid adjustment, fertilization, chemical control and strong seedlings and other technical links.

6. Precision seeding

The planting density was controlled according to the leaf age of the seedlings, and the seedings were quantitatively seeded and homogenized. General seedlings seedlings broadcast 100-120 grams per square meter, seedlings in rice seedlings broadcast 70-80 grams per square meter, seedlings broadcast 50-60 grams per square meter. After sowing, cover fine soil 0.5-1.0 cm to the degree that the seed is not exposed. After sowing, a layer of film is laid on the car, and then the arch cover film. Four weeks after the film is compacted and compacted to preserve moisture.

7. Careful management, nurturing strong

Soaking to the seedling stage is mainly for heat preservation and moisturizing. When the temperature in the membrane exceeds 35°C, attention should be paid to ventilation and temperature reduction. Emergence to one leaf and one heart period to adjust the temperature and control the humidity, the root to promote the lower bar, the film temperature is maintained within 25 °C, ventilation should be added when the Ministry of small water. From one leaf to one heart to two-leaf and one-hearted period, gradually ventilate the seedlings to reduce humidity, and the intra-membrane temperature is kept at about 20°C. One leaf was sprayed with 3% Guanghe Lingshui agent 1000 times or with 70% 2% enemy dexamethasone 2.5 grams per square meter, and 1.5 kilograms of water was sprayed to prevent Rhizoctonia solani. Before and after the two-leaf and one-hearted period, chase after weaning fertilizer, chase urea 5 to 10 grams per square meter, and spray 1000 times evenly with water, and spray water to wash the seedlings. After the two-leaf and one-heart period, strengthen the hardening seedlings and gradually open the shed film. Three days prior to transplanting, the “supplying marrying manure” was applied, and the same amount as the weaning fertilizer. One to two days before transplanting, shoots were sprayed with 20% tricyclazole 750 times to prevent rice blast.