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(1) The base fertilizer is based on organic fertilizer. The total fertilizer consumption of hybrid rice is 50%-60% nitrogen and 70% phosphorus and potassium are from the soil. If the fertilizer is insufficient, the potential nutrients in the soil will be excessively consumed and reduced. Soil fertility and organic fertilizer application are important ways to maintain and improve soil fertility. Therefore, the production of hybrid rice should emphasize the accumulation of soil and fertilizer, develop more fertilizers and a variety of green manure in the aquaculture industry, promote the harvesting of the ear and the return of straw to the field, so that the application of organic fertilizer accounts for 40% of the total fertilizer application.
(2) Appropriate amount of early application of glutinous fertilizer Because of the strong root activity of hybrid rice, new roots occur faster after insertion, generally 5 days after insertion of rice, and 3 days after insertion of rice, it is possible to apply urea to promote tillering. In divided application, the first application of urea per acre is 6-7.5 kg; after 7 days, according to the seedling situation, the second poor manure is applied to the poorly grown field, and the urea is used within 4 kg of urea; Fields with less fertilizer and potassium deficiency, chasing 5-7.5 kg of potash per acre.
(3) Seeing seedling application of panicle fertilizer Spike fertilizer can be divided into flower-promoting fertilizer and flower-preserving fertilizer due to different application period and effect. In the case of proper fertilization in the early stage and balanced growth of the seedlings, it is generally necessary to focus on the preservation of the flowers, and only apply the flower fertilizer and the application amount should not be too much. Generally, about 2.5 kg of urea per mu is applied. If the early stage of fertilization is insufficient, the number of seedlings is small, and the individual's growth potential is poor, then both the flower-promoting and the flower-preserving fertilizer can be applied, and 5 kg of urea can be applied per acre. Hybrid rice has a large demand for potassium fertilizer. After rehydration in the field, it is combined with topdressing nitrogen fertilizer, and about 2.5 kilograms of potash is applied per acre to increase the yield.
(4) Look at the seedling application of granular fertilizer and foliar topdressing before the beginning of the ear, the leaf color of the seedlings is too light, apply 2-2.5 kg of urea per acre, and prematurely fall yellow field after the heading, apply urea 2.5--3 per mu. For kilograms of normal hybrid rice, it is only suitable to use 500-750 kg of urea to 50 kg of water for spraying. Because of the higher absorption of phosphorus and potassium in the late stage of hybrid rice, the late application of foliar fertilizer has a good yield increasing effect. Spraying 50 kg of potassium dihydrogen phosphate to 50 kg of water for 2-3 days before the first spike or the 2-3 days of the beginning of the spike, the spray of the poor growth of the seedlings has the ability to enhance the plant's resistance to high or low temperatures.
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Hybrid rice fertilization technology
Hybrid rice fertilization technology The principle of fertilization of hybrid rice should be organic fertilizer and phosphate fertilizer as base fertilizer. Potassium fertilizer is mainly used as tiller fertilizer. Nitrogen fertilizer is applied several times, especially pay attention to strong seedlings and strong seed fertilizer. Big spikes and large grains.
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