Rice cultivation techniques for ridge cultivation

The technology of rice cultivation with ridge cultivation was developed on the basis of early rice breeding and sparse planting, and rice cultivating was used as ridge cultivation. The success of the trial in Suibin County in Heilongjiang Province in 1998 was achieved. The application of this cultivation technology in Weibin County has reached 17,000 hm2, accounting for 70% of rice cultivation area in Suibin County. Practice has proved that this cultivation technology has the advantages of improved ground temperature, water-saving irrigation, increased fertilizer utilization rate, no easing of seedlings, etc., and an average yield increase of 21.3% to 39.2% compared with the drought breeding machine. 1 Soil ridging and fertilization 1.1 Soil preparation ridging on the basis of fall-turning land and autumn deep-soil, dry and fine leveling, ridging with a locomotive, ridge spacing 65 cm, suppression with “V” type repressor, reaching a ridge height of 10 ~ 15cm, ridge width 25 ~ 30cm. 1.2 Apply sufficient base fertilizer to produce 70.5m3 of high-quality farmyard fertilizer per hectare, and apply it in front of the plantation. Apply 45.Okg of urea, 124.5kg of diammonium phosphate, and 36.Okg of potassium sulfate per hectare. Apply the ridge to the ridge. 2 Selection of high-quality, high-yield and good-quality varieties should be based on varieties with strong tillers, high quality, high yield, and strong stress resistance. In the region, there are mainly varieties of Japonica rice No. 8, Longji No. 8 and Shangyu No. 397. 3 seedlings 3.1 seed treatment with 45.0 ~ 49.5kg per hectare, wind screening with 25% scouring or 10% seed soaking, germination, seed burst buds grow 1 ~ 2mm, on the shade in the bud to be broadcast . 3.2 Seedbed preparation Choose leeward sunny land, 60-81m2 seedbed per hectare Honda, seedling shallow 10cm, leveling. The bed soil of sieved strong tanning agent was spread on the seedbed. There are 360 ​​to 480 carton discs per hectare. The seedbed shall be thoroughly stricken with bottom water, the leveling of the bed surface shall be mud-like, and the carcasses with nutritious soil (2/3 of the total depth of the caries) shall be pressed into the seedbed so that the level of the disc and the bed can be leveled. The key steps for raising seedlings. 3.3 Pendulum plate sowing On April 15-20, the temperature can be sown stably at 13°C and soaked with water before sowing. The principle is 2 to 4 seeds per hole, 60g buds per plate, dilute first, then reseeding Until the required amount has been broadcast. About 0.5cm around the cover soil, must be exposed to the surface, to prevent late rice roots together, is not conducive to picking seedlings. Close the weeds with 10% of the daughter's milk or 20% of the enemy's cockroach, cover the mulch to keep warm, moisturize, and then close the shed. 3.4 Seedbed Management a. Temperature Management Sowing until the emergence of the seal, the temperature inside the shed to maintain 28 ~ 30 °C. When the emergence of 60% to 70%, the mulching film. 1.5 to 2.5 leaf shelf temperature to maintain 25 °C, pay attention to ventilation and hardening seedlings; 2. 5 ~ 4.0 leaf shelf temperature to maintain 20 °C. 3 to 5 days before planting, cover the night cover to prevent freezing damage. b. Moisture management Timely replenishment when water is scarce, watering takes place sooner or later, and water is poured once. 4 planting time and specifications planting time May 10 to 25, should not be late as soon as possible. Planting planted ridges on double rows (45cm + 20cm) 13cm, seedlings per hole inserted a hole. 5 Field management and harvesting 5.1 Water layer management Planting water when transplanting, immersing in shallow water for 2 to 3 days after transplanting, and keeping the water layer at 3 to 5 cm, except for returning to greening, weeding and deep-water irrigation to prevent chilling injury during meiosis, Use a shallow wet-light alternate irrigation. 5.2 After catching green, the manure was immediately recovered, combined with chemical weeding to recover 60.Okg of urea per hectare, to promote tillering; the ear fertilizer was recovered from 7 to 10 days before heading, and 30.0 to 40.5 kg of urea and 22.5 kg of potassium sulfate were recovered per hectare. 5.3 Prevention and control of pests and weeds Seriously strengthen comprehensive prevention and control measures that are mainly prevention-based, and use chemical agents in a timely manner to ensure that rice is not harmed. 5.4 timely harvest According to the characteristics of the varieties, timely harvesting and threshing should be carried out during the ripening period of rice.