First, select high-quality and high-yielding new combinations of hybrid rice, the current production has been selected stronger than Yuyou 63 combination II You Hang No. 1, II Youming 86, You You 86. Second, timely sowing, early planting, extend the vegetative growth period, increase the total solar radiation during the whole growth period of rice (mainly during the growth period of Honda), significantly increase the dry matter accumulation, and form the production structure of multiple spikes and spikes. The appropriate timing of sowing is determined by the local climate conditions, which is generally the broadcast and cutting period of the local early rice. Third, nurture age-appropriate breeding methods include dry seedlings, throwing hoeings, and moist hoeing. Regardless of the type of cultivating seedlings, all cultivars should be sowed. The standard sowing amount and fertilizer amount are as follows: 30g per m2 sowing seed for dry seedlings, 30g for special fertilizer for rice, 25-30 days for seedlings, 1-2 seeds for sowing seed per hole, and 5g for rice per m2. In the mud, the age of about 25 days; moisture seedlings per m2 seeds 20g, rice fertilizer 30g, about 30 days old. In the two-leaf envelope period, dry-leafing and dry-moistening four-leaf stages were sprayed with 300 units and 600 units of paclobutrazol solution for 1 time to increase the number of tillers and promote seedlings. Before wet weeds must be drained. Fourth, appropriate dense planting. In order to ensure the first quarter and the second season of the reproductive season, high yields must be inserted into the basic cluster number. Generally, it is required to insert about 20,000 acres per mu. Fifth, reasonable use of Honda fertilizer. The total nutrient requirements for N, P, and K fertilizers in the first season of rice in the first cropland were 15kg, 6kg, and 15kg, respectively (the fertility of rice fields with different fertility can be adjusted appropriately). The ratios of base, alfalfa and panicle fertilizers were N5:2:3, P6:4, respectively. : 0, K2: 4:4. In the regeneration season, the N-fertilizer is the main fertilizer, supplemented by a small amount of K-fertilizer. After 20 days of head-season rice, Mushi N10kg is used purely in the 20-day period, equivalent to about 22kg of urea, and 2-3kg of K-fertilizer, equivalent to about 5kg of potassium chloride. The seedling fertilizer is 1-2 days after the first season of rice cutting, Mushi pure N10kg, equivalent to about 4.5kg of urea. 6, ridge planting, scientific management of water. In order to facilitate the water pipes, promote the growth and development of rice seedling roots, ensure that the first season rice grows in the late stage of the growth of green shoots and stalks, and increase the germination rate of the regenerated shoots. The ultra-high yield cultivation of ratoon rice adopts the ridge and furrow type. The plough layer is deep, and the drainage section is inconvenient. The ridge width is 30cm in height, 30cm in height, 20cm in width, and 2 rows of rice seedlings are planted on the ridge with a 13cm spacing. The plough layer is shallow, and the convenient drainage and irrigation section is dominated by alfalfa planting. The planting width is about 1.8m, the planting height is 20cm, the planting width is 20cm, and 10 bushes are planted in each row. The plant spacing is 16.67cm. The principle of the first season rice water pipe is thin-water rice transplanting or fresh-water seedling transplanting (planting), shallow water promotes cocooning, 25 days or so after transplanting, field-baked seedlings are controlled, and the grounding continues for 15-20 days until the soil is white or rice seedlings are slightly seen. Rehydration when yellowing, and keep dry and wet until young spike differentiation. Appropriate panicle fertilizer was applied at the second or second stage of young panicle, and thin water was retained during application, and naturally dried after application, alternating between wet and dry until breakage period. Heading flowering period irrigation water (in case of high temperature should be filled with deep water) to protect flowers. After the pollination of Yanghua was finished, the water was replaced with wet and dry water to ensure that the roots were strong and stalks were grouting. When the application of bud fertilizer is filled with thin water, it will naturally fall and dry after the main harvest. After the first crop rice was cut, the thin water was used to catch the seedlings, dried after application, and alternated between wet and dry till heading. After heading, the thin water was used for irrigation for 15 days. After the milk was cooked, the water was alternately wet and dry, and the water was drained until 7 days before maturity. harvest. Seventh, high retention rice. The hybrid rice group used for super-high-yielding cultivation of ratoon rice will generally have the physiological advantage of apical buds, and the axillary buds of the inverted second-trivial buds will have a higher germination rate, constituting 70-80% of the reproductive panicles and reproductive yield. Harvesting sorghum in the first season rice can retain as much nutrients as possible in the upper dominant buds and rice hulls, which can effectively increase the yield in the regeneration season. The height of the stubble is 1/3 of the plant height, which is generally 40-50cm. VIII. Pest control and top dressing. The pest control of ratoon rice is similar to that of ordinary hybrid rice, but the control indexes are lower, and the control measures are more stringent. The main pests and diseases are seedling mites, leafhoppers, sheath blight, stem borers, giant salamanders, and leafhoppers. Rice planthoppers and so on. Prevention and control of pesticides are tricyclazole, Jinggangmycin, Ye Qingshuang, insecticide double, bufalin and so on. The appropriate period of prevention and control was six key periods of seedling stage, tillering stage, panicle differentiation stage, heading stage, seedling stage of regeneration stage, and heading stage. The top dressing can be combined with pest control at the same time. The main period is the first season and the heading stage of the regeneration season. The topdressing fertilizers are mainly foliar fertilizers such as potassium dihydrogen phosphate and large fertilizer kings, which are suitable for extraterritorial application. The concentration of fertilizer is within 2 inches, and the leaf color is light. The segment can be properly added with a small amount of urea. In order to make the headings of the reclamation season neat, when their headings are 40-60%, they should be sprayed with “9-200†2g per acre to promote their full heading.
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