After a good pre-growth, rice enters the reproductive stage of the middle and late stages. Strengthening the field management at this stage has a great relationship with the yield and quality of rice.
First, moderately put the field. The field should generally be carried out during the period when the rice is not sensitive to the water reaction, that is, it is suitable from the late tillering stage to the early stage of the young panicle differentiation. The following principles should be followed in operation: that is, the seedlings and seedlings should be properly placed early; the mud feet are deep, and the phenomenon of being long will be toasted, and vice versa; if the water is not good, it should not be rescheduled;
Second, scientific irrigation Long-earing stage is the peak of physiological water demand in rice life, especially in the 2-14 days before heading, the most sensitive to water, not water shortage, so as not to affect the differentiation and development of spikelets. The rehydration after roasting in the field should be done in shallow water, and the gap irrigation method should be adopted: “Chen water is not dry, new water is not onâ€. The scientific irrigation after roasting has greatly saved the precious water resources, improved the ecological environment of the soil, maintained and improved the vitality of the roots, and facilitated the absorption and operation of nutrients. The irrigation method during the heading period is: deep water heading, shallow water grouting, moist seeding, and drainage and drying about 5 days before harvesting. Do not cut water too early, affecting the weight of the grain.
Third, the skill of applying the ear and grain fertilizer is generally applied after the beginning of the differentiation of the young panicles. The dosage should be determined according to the field growth of the rice: the number of stems is too high, the leaves are thick, the application is less, the application is delayed, and the special fertilizer for the three-way rice is used. 5-10 kg can be used; the number of stems is insufficient, the leaves are yellow and the shades are different, and the application is to be applied early and re-applied.
Increasing the application of granular fertilizer is mainly the deficiency of supplemental fertilizer. The optimal application period of granular fertilizer is the period when the rice leaves can be naturally turned light before the breakage, that is, the first ear before the heading is suitable for the topping. Granular fertilizer is generally better for compound fertilizer, and the amount of application is about 10 kg. However, the ground force is sufficient, the growth is too strong, and the field with thick leaves is not suitable for applying grain fertilizer to prevent the late-ripening of the grass, affecting the yield and quality. In order to prevent premature senescence of the plants after heading, foliar spray fertilizer should also be carried out at this time. You can use the special foliar fertilizer for rice “Zengbaijin†to spray on sunny afternoon and evening. When spraying, spray on both sides of the blade.
IV. Pest Control In the middle and late stages of rice growth, we should focus on the control of bacterial blight, sheath blight, rice smut, as well as pests such as stem borer, stem borer, and rice planthopper, and these diseases and insect pests occur in multiple complexes. According to this actual situation, pesticide compounding technology should be used for compound prevention and control, such as bacterial blight, sorghum and other complex hazards, which can be controlled by mixed liquid of leaf sulphate and insecticidal double, thus saving labor and province. It also played a good control effect.
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