Rice hybrid technology
According to experiments in recent years, the practice of intercropping and interplanting has increased the number of biological populations in the field, remedied the gap niche, changed the planar structure into a three-dimensional structure, skillfully used the space-time difference, and enhanced the stability of the field system, which can be controlled. The occurrence of rice blast can effectively prevent lodging of japonica rice, and can also use the integration effect to increase crop yield. It is a state-of-the-art technology with high investment, high efficiency, simple technology, and the masses are willing to accept it, and has good economic, social, and ecological benefits. Now introduced for reference only. 1, choose a good mix of planting varieties: hybrid plants should be selected between the hybrid rice blast resistance, such as ii You 7, Yi Xiang You 1577, Chuan Xiang You 2 and other varieties. The intercropped japonica rice should have high yield, strong disease resistance, and good hoeability, which is more than 20cm higher than that of the hybrid rice, and the mature stage is slightly earlier than the high-bar-grand wine valley of the hybrid rice, such as the high-yield varieties such as the oxtail quail and the pupa. 2. Indica and japonica rice were sown and planted in the same plant: Indica rice was too late to plant, and the effect of hybrid rice would not achieve the effect of intercropping. According to recent practical experience, the effect of co-planting japonica rice with hybrid rice was better. It is advisable for Yucao to grow in dry land, from the end of February to the beginning of March. The amount of mu for use is 1.25 kg of hybrid rice and 0.2 kg of japonica rice. Transplanted in mid-April, and japonica rice and hybrid rice were planted in the same plant. 3. Control the intercropping density: If the density of the intercropped japonica rice is too large, it will cause competition with the hybrid rice, affect the hybrid rice yield, and cause poor ventilation and light transmission conditions, which will easily aggravate the occurrence of sheath blight and rice blast. If the intercropping density is too thin, it will not achieve the purpose of increasing the income of the inter-planted cereal valley. Density test results showed that the optimum cultivation density for the intercropped and intercropped plants was as follows: Hybrid rice was cultivated in widths of 5 to 6 inches (11 to 13+6) in width, and 1.1 to 12,000 litters in acres, and indica rice crossed every 6 rows. The rice was planted in a row with a nesting distance of 8 to 10 inches and a mu of 1200 litters. 4, scientific fertilization control water. The nitrogen fertilization, phosphorus supplementation, and potassium fertilization modes were adopted, and the principles of organic manure and microbial manure were mainly adhered to. Before planting Mushi organic fertilizer 1500kg, urea 10kg, phosphate fertilizer 30kg, plant ash 15-30 or potash 20kg. At the end of April, combined with wolfberry, Mu topdressing urea 3 ~ 4kg. n:p:k is 1:0.5:0.5. Base fertilizer accounted for 70% and top dressing 30%. The main water is wet irrigation. 5. Strengthen pest monitoring and control: As a result of conventional japonica rice susceptibility to rice blast. Therefore, the monitoring and control of rice blast should be added. That is, before the sowing of hybrid rice and indica rice, the use of strong chlorine fine seed soaking, and transplanting with tricyclazole dipping, carrying the drug transplanting, pay attention to the leafhopper during the growth period. The monitoring of neck lice, sheath blight, and second-generation locusts should be immediately extinguished by the use of drugs to prevent widespread infection.