A Detailed Explanation of the Causes of Rice Sprouting on the Panicle and Prevention Methods
Rice is the most important food crop in our country. During the rice harvest, the phenomenon of sprouting on the panicle occurs, which not only does not affect the quality of the rice but also affects the germination rate of the seeds, resulting in poor quality when sowing the following year and bringing economic losses to rice cultivation. So what are the causes of rice sprouting on the panicle? Let's find out together.
1. Harm of sprouting on the panicle
Sprouting on the panicle affects the quality and yield of rice, generally reducing it by 10%, and it also affects the price of the grain. In addition, during sprouting on the panicle, the weight increases, causing the panicle to be top-heavy and lodging, worsening the lodging phenomenon. In continuous rainy and humid environments, it is also very likely to induce rice blast disease, leading to further yield reduction. During harvest, the grains easily fall off, with a loss rate of over 10%. Taking all of this together, once rice develops sprouting on the panicle, the yield may be reduced by more than 30%.
2. Variety reasons
Rice sprouting on the panicle is closely related to the dormancy of its variety. Some varieties have a short dormancy period and are extremely prone to sprouting, while varieties with a dormancy period are not prone to sprouting. In addition, varieties with thinner seed coats easily absorb water and sprout, while varieties with thicker seed coats do not readily absorb water, so they are not prone to sprouting.
Prevention methods: When planting, adapt measures to local conditions and choose rice varieties with high yield, strong stress resistance, high quality, and a long dormancy period, which can greatly reduce the phenomenon of sprouting on the panicle.
3. Weather reasons
When rice is about to mature, if it encounters continuous rainy weather, the water absorption rate of the rice will reach more than 24%, which will satisfy its sprouting conditions. If the temperature at this time exceeds 18 degrees, it will begin to sprout, and the higher the temperature, the faster the sprouting.
Prevention methods: Based on climate changes in previous years, reasonably arrange the sowing time of rice so that the heading and flowering and maturity stages of rice avoid the rainy season and reduce the phenomenon of sprouting on the panicle. When environmental conditions meet the conditions for sprouting on the panicle, drain promptly after rain to prevent the panicles from being soaked in water and avoid later sprouting. If rainy weather is encountered during the maturity stage, strengthen inspection. For fields where sprouting on the panicle is found, harvest early when 85% of the grains are mature to reduce sprouting.
4. Improper management
Some farmers irrigate continuously during the rice grain-filling stage, making the field water content high and the humidity relatively high, causing the grains to fill too fully. During the rainy season, they do not dry easily, and if they continue to absorb water and expand, they are extremely prone to sprouting.
Prevention methods: For water management, use shallow water for tillering, and drain the field appropriately at the right time in the middle stage to prevent rice lodging. During the heading and grain-filling stages, keeping the soil moist is sufficient. Do not deepen the water level, so as to prevent rice from absorbing too much water.
The above is an introduction to the causes of rice sprouting on the panicle and prevention methods. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.