This summer crop ripening period has been postponed, so that the evening, affect rice transplanting period. All localities must rush to harvest and plant crops, because seedling management, to maximize the management of planting.
Grab early work and improve the quality of land preparation
After harvesting the summer crops, they catch fine weather, make full use of mechanical assaults to pick up and pick up the sunburn, eliminate pests and exterminate insects, and finely prepare the soil. Straw returned to the field, after the ploughing, the soil should be sowed in time. After the straw is softened, the medium-sized tractors shall be used to support the straw returning machine. The straw shall be ploughed at one time to fully mix the grass and mud and be well-grounded before the planting. Field, planted after the soil is solid. To improve the quality of field operations, Daejeon's land preparation should be done in a field-leveled, soft-soiled and fat-mixed environment. The difference between the heights of the fields should not exceed 3 cm, and the fields should be clean and free of debris, and the topsoil should be fine and thick, and the tops should be rotten. After inserting the block, the machine should be moderately submerged. The sandy soil should be solid for about 1 day. The loam should be immersed for 1 to 2 days. The clay should be immersed for 2 to 3 days. It should be planted when the mud is deposited and the topsoil is soft and hard.
Grab early transplants and increase planting density
Delaying the transplanting period of rice can easily cause the increase of the proportion of the older instars, which will lead to super-planting of the indica rice, shortening the effective tillering period of rice, and it will be unfavorable to early emergence of seedlings and preservation of panicle spikes. It is necessary to do a good job of cultivating the estuary as soon as possible and work hard to transplant it properly. Machine-planting transplants are generally transplanted at the 3 to 4 leaf stage, and the seedlings are kept at 15 to 20 days. The conventional hand-planted seedlings are usually transplanted at the 6-leaf stage, and the seedlings are controlled at about 30 days. The cast seedlings are generally at the 4 to 5 leaf stage. Throwing plants, age control in 20 to 25 days. For the seedlings that are tightly attached to the mouth, the growth-adjusting agents such as paclobutrazol may be sprayed appropriately to delay the growth of the seedlings that are prone to over-ageing.
This year, the transplanting period of rice has been significantly delayed. All localities must appropriately increase the number of basic seedlings and lay the foundation for the whole plant. Machine insert rice generally requires a spacing of 11.7 centimeters (grain spacing adjustment handle at 90 positions), planting 18,000 to 20,000 holes per acre, 4 seedlings per hole or so, basic seedlings 70,000 to 80,000. Hand-planted conventional japonica rice spacing 22 to 24 cm, plant spacing 12 cm, basic stem seedlings reaching 90,000 to 100,000 per mu; high-yielding farms, high-yielding fields spaced 24 to 26 cm, plant spacing 12 cm, basic stem and seedlings per mu of 80,000 ~9 million. Hand-planting hybrid rice spacing 26 to 28 cm, basic stem seedlings 70,000 to 90,000 per mu; high-yield side, high-yielding fields line spacing of 28 cm, basic stem seedlings per mu more than 70,000. Throwing rice is generally required to set the seedlings on the plate (40 sets of 561 holes in each field, and 434 holes in the platter of about 50 plates), throwing 18,000 to 20,000 holes per mu, and basic seedlings of more than 70,000 to achieve shallow water High throw, even throw. Persist in the cultivation of varieties, the basic seedlings with strong tillering characteristics can be appropriately reduced, and the varieties with relatively poor tillering characteristics can be correspondingly increased.
Early management and promotion of early-onset fields
According to the planting method, the seedlings are classified and managed. In terms of water slurry management, transplanting rice should be nursed from the transplanting to returning green to protect the seedlings with a water depth of 3 cm; shallow water in the tillering period should be used for irrigation and promote multiple roots and fast tillers. Straw returned to the field, so that short-term dehydration, open field, increase soil oxygen content, prevent soil toxic substances caused by excessive seedlings. Fertilizer application, transplanting rice to do live tree after early application of lotus root fertilizer, hand-planted rice, throwing rice in 5 to 7 days after planting urea 10 kg per mu; machine inserted rice seedlings should be divided fertilization, generally 5 to 6 kg of urea was applied per acre for 5 days after planting, and 10 kg of urea was applied per acre for 12 days after planting. The basal deficiencies in the field, in the application of fertilizer after 1 week, as appropriate, apply balance fertilizer, apply urea 3 ~ 5 kg per acre. In terms of pests and weeds, we must pay attention to the prevention and control of rice stripe disease and black-streaked dwarf disease, and at the same time do a good job of chemical weeding. For the field where there are stiff seedlings, appropriate control measures should be taken to promote the rapid recovery of seedlings.
In addition, due to late summer crops, the sowing time of live-rice sowing this year is delayed by 7 to 10 days, and the production risk is further increased. Farmers who insist on planting direct-seeded rice should sow early varieties suitable for local planting that are suitable for short growing period and mature period, and appropriately increase the amount of seed used. In field management, 1 leaf and 1 heart period cut off milk fertilizer (5 kg of urea per acre), and 4 to 5 leaf phases promoted axillary fertilizer (10 kg of urea per acre). The seedlings were kept moist until the 3rd leaf stage, and the 3rd leaf stage was enough for the seedling stage to fill with shallow water.
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