"Returning Spring" refers to the cultivation of early rice varieties for late rice, and is the technical measure for disaster relief after the floods. The cultivation of high-yielding cultivation techniques in the spring of seeding spring is as follows:

The first is the fine fieldwork to prevent boiled shoots. Timely paddy fields were leveled and leveled in paddy fields so that the field heights were not too high, and drainage ditch was opened. After 1 day, it was ready for planting. Keep the field flat and prevent hot boiled shoots.

The second is timely sowing to ensure safe panicles. Hybrid rice and super rice are the first choices, such as Lingliangyou 268, Liangyou 42, Zhongzao 39, and Zhongjiazao 17. Grab the time for early sowing as soon as possible, no later than July 20, and strive to secure full panicle control before September 15. Before seeding, seed treatment and soaking and germination should be done. It is best to use a 35% sodium thiocarbamate dry powder for seed dressing, and then spread evenly to ensure that the whole seedling is broadcast. The amount of seed per acre of field: 5-8 kg of conventional rice and 3 kg of hybrid rice.

The third is to do a good job of chemical weeding. Weeding should strictly adhere to the principle of "one, two killing, three fillings." The “one letter” is sprayed on the surface with 50% of Prosulfuron-methyl per acre for 30 days and 30 kg of water per acre evenly within 3 days after sowing, and keeps the wet state of the car for 5-7 days; When it grows to 3 leaves, 80 to 100 ml per mu can be used, or 1 to 150 ml of rice can be used to spray 15 kg of fine water. If both broad-leaved weeds and sedge cause harm at the same time, another 48% solution of weed pine can be sprayed in 150 ml with 30 kg evenly. When spraying, field water must be drained, and the shallow water layer must be covered within 2 days after spraying, and the water must be kept 5 Days and so on; "three supplements" that is, after five leaves one heart, according to the overall weeding effect and the occurrence of grass-roots situations as appropriate to take remedial measures.

Fourth, science and fertilizer operations. In the management of water slurry, it is necessary to control water and seedlings from the time of sowing to the time of planting in the second leaf and the roots of the seedlings, and to maintain the moist state of the glutinous surface, to mainly furrow irrigation, and to deepen the roots; and to keep the shallow water ground after the two leaves and one heart period. Promoting delivery; timely drying in the middle. The ideal number of seedlings for live late rice is about 300,000 per acre. According to the conditions of direct seeding rice seedlings and seedlings in the field, dehydration and reseeding of the seedlings at the 6th to 7th leaf stage will control the number of tillers; the water slurry management in the middle and later stages will maintain the water layer except during the panicle differentiation period to the heading filling stage. The rest of the period should be dry, wet and wet, and cut off water 7 to 10 days before harvest. Fertilization should adopt the principles of “promoting, controlling, supplementing” and “controlling nitrogen and increasing phosphorus and potassium”. The basal fertilizer should adopt the full-layer fertilization method. Apply 45% compound fertilizer 30-35 kg/m3, proper amount of zinc fertilizer and silicon fertilizer in the first time of paddy field; topdressing should be carried out in the three-leaf stage of seedlings, applying Urea 4 to 4 mu per mu. 5 kg, potassium chloride 5 ~ 7 kg; 6 leaves per acre and then apply urea 5 ~ 6 kg; ear fertilizer supplement can be applied in the water after the sun, urea per acre 3 ~ 6 kg, potassium chloride 5 ~ 7 kg. Before and after the heading of direct-seeded rice combined with disease prevention and pest control, appropriate foliar fertilizers such as grain satiation, sprayed fertilizer, and potassium dihydrogen Phosphate were selected as extra-root fertilizer.

Fifth, comprehensive prevention and control of pests and diseases. The late rice field should prevent late lodging and premature senescence, and pest and disease control should focus on the prevention and control of sheath blight, rice blast, and rice planthoppers. The key period of prevention and control is the late tillering, heading and heading stages of direct-seeded rice.

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