Why does rice produce empty chaff and how to prevent it?

Why does rice produce empty chaff and how to prevent it? Please give a detailed introduction. Under normal circumstances, the rate of unblighted rice grains is 10%-20% in general, and 40% in severe cases, which has a great impact on rice yield. The main results are as follows: 1. the formation reason of rice empty grain rate is mainly affected by three factors. 1. Climate factors. In the process of rice growth and development, especially in the heading and flowering stage, the environmental conditions are not suitable. If the temperature is more than 35%, or less than 20 ℃, overcast and rainy days or too dry, it will affect the development of rice panicles and pollination, resulting in pollination difficulties, resulting in an increase in the percentage of empty grains of rice. two。 Cultivation factors. Unreasonable fertilization, excessive cultivation density, no drainage or long-term deep irrigation, too long and heavy drying time in the middle stage, too early water cut off in the later stage and premature senescence of plants will affect pollination and fertilization. The percentage of unblighted grains increased greatly. 3. Disease and insect factors. Rice is damaged by diseases and insect pests, and if it is not controlled in time, it will also increase the percentage of empty grains. Second, prevention and control methods. In addition to strengthening cultivation and management, the following mixture can greatly reduce the percentage of unblighted grains of rice: 10g of Shengnu + 0.5g of gibberellin + 100g of boron fertilizer + 15kg of water. In the areas where rice febrile disease, rice false smut and sheath blight are serious, adding 25g copper sulfate + 50g salt + 100g vinegar to the above mixture can not only quickly eradicate the disease, but also increase fertilization and reduce empty chaff grains. If there are insect pests, 10 grams of poison can be added. Saint-nongsu can significantly reduce the empty chaff grains, the main functions are: ① can make rice heading neatly, improve the vigor of female and male flowers, promote pollen tube elongation, prevent pollen abortion, and enhance the ability of pollination and fertilization; ② can enhance photosynthesis, make plants strong, prevent physiological premature senescence, enhance resistance to the effects of continuous overcast and rain, dry and hot wind, lack of light and other adverse environment on rice, especially enhance the ability of pollination and fertilization at low temperature. ③ can enhance the efficacy of pesticide and fertilizer, improve the disease control and insecticidal effect of pesticides, and restore the healthy growth of damaged rice as soon as possible. Click to get more rice planting techniques click to get more food crop planting techniques