The key technologies for high-yielding cultivation of super rice combined with the rice cultivation systems and methods in each rice region, according to the characteristics of super rice varieties, through the key techniques of seedling breeding, planting, fertilizer and water control, population optimization, comprehensive prevention, precise quantification and other key technologies to promote the formation of high-yielding super rice population, improve The amount of material growth in the middle and later periods, and increase the total amount of florets in the population. By realizing the potential of super rice production, the high yield of super rice can be achieved.
Technical points: 1. Precision seeding, nurturing strong. According to the ecological characteristics of different rice areas and the characteristics of super rice varieties, the sowing date should be reasonably arranged. Improve seed quality and seed quality, ensure seedling rate and quality of seedlings; control seeding rate and seed use amount, hand transplanting seedlings sowing rate is generally about 7-8 kg/mu, with seed amount of 0.6-0.8 kg/mu, The ratio of grass to beetle is 1:10; dry bed breeding is 100 to 130 grams per square meter, and plastic trays are 25 to 40 grams per dish; machine-transplanted hybrid rice generally has 80 to 100 grams per panicle, and conventional rice is 100 to 120 grams per pan. On the basis of carefully selected seed and fine seeding, the plant is equipped with shallow water irrigation, early application of sub-fertilizer, chemical control, pest control and other measures to achieve seedling uniformity and seedling growth.
2. Wet farming level the whole field. One week before transplanting, paddy fields were irrigated with dry and wet soils, dried and irrigated, and ploughed 30 cm deep. Apply organic fertilizer (cake weight 50 kg, calcium magnesium phosphate fertilizer 40 kg) before ploughing, rotate tillage one day before transplanting, and then pour shallow water into the soil. After the ploughing, the water should not be leveled for several times. After transplanting.
3. Reasonable density, expansion and sparse planting. Considering the growth characteristics of rice varieties comprehensively, the density of single-season hybrid rice transplanted by hand is controlled at 1.2-1.4 million bushes per mu and the row spacing is expanded to 26-30 cm. The planting density of conventional early rice should be between 1.8-2.0 million bushes. The transplanting guarantees that the falling field seedlings will be above 55,000; the continuous cropping hybrid late rice planting density will be between 1.6-1.8 million bushes. The machine spacing is usually 30 cm and the conventional rice machine is 12-16 cm. Hybrid rice plants are planted at a spacing of 17 to 20 centimeters, with about 2 clusters per bush, 1.1 to 1.3 million bushes per mu of field, and about 15 to 20 plates per acre.
4. Irrigation. During the entire period of rice growth, “three waters, three wets and one dry†are used, ie, when the rice transplanter is inoculated with inch water, it is easy to return green and live trees; irrigation water is used when fertilizing and removing insects, nitrogen is used to increase the fertilizer utilization rate, and the effect of removing insects is improved; In the flowering stage of booting, we need to inoculate water in order to prevent the degradation of spikelets. In the period of tillering, ear formation and fruiting stage, shallow water and wet irrigation are used to dry and wet and wet.
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