A Detailed Explanation of the Causes of Early Heading in Rice and the Control Methods
When growing rice, the phenomenon of early heading in rice can occur. So-called early heading in rice refers to the phenomenon in which the young panicle of the rice main stem begins to differentiate or form during the seedling stage, and then heading occurs too early after transplanting. This causes the rice plant type to decrease markedly, the rice panicle to shrink, and yields to drop sharply. So what are the causes of this phenomenon? How should it be controlled? Come and take a look at the detailed introduction from Qinong Net.
1. Poor seedling quality
When sowing, the quantity is too large, resulting in overly dense emergence, and combined with improper management, the seedlings grow thin and weak, the growth cycle is continuously shortened, and early heading occurs. In addition, sowing too densely makes the seedlings crowded as they grow, causing weak seedling growth, and after transplanting the recovery period is long and tillering is delayed, which can also lead to early heading.
Control method: Strictly control the sowing rate and pay attention to the seedling growth density. If growth is too dense, thin the seedlings in time. In addition, cultivate strong seedlings to improve the overall quality of the seedlings. Prevent the occurrence of early heading.
2. Transplanting with an older seedling age
General rice varieties have little flexibility in seedling age, but if the transplanting seedling age is too old, and the accumulated temperature required by the variety is met, young panicle differentiation will begin ahead of time, forming early heading. Therefore, the transplanting seedling age of rice is closely related to early heading. With a suitable seedling age, the rooting ability of the seedlings is strong and the plants grow vigorously; but if the seedling age is long, its rooting ability is weaker and its growth is weak, and combined with improper management, it survives slowly after transplanting, which leads to rapid heading.
Control method: Improve seedling quality. When transplanting, it should not exceed the seedling age period. If the best transplanting time is exceeded, heavy fertilization can be applied in the paddy field to coordinate the vegetative growth of rice and reduce the occurrence of early heading.
3. Climatic causes
During seedling raising, if there is continuous long-term high-temperature and drought weather, under sufficient sunlight, rice growth will be extremely rapid and enter the reproductive period ahead of time. If transplanting is not carried out in time at this time, early heading will occur because of the older transplanting seedling age. In addition, the reason rice heads is that after it reaches the accumulated heat required for its growth, it begins to head. Therefore, during periods of high temperature and sufficient light, early heading is very likely to occur.
Control method: Pay attention to changes in seasonal climate. If there is a continuous high-temperature and drought period, find a way to lower the temperature, water to increase soil moisture, or transplant earlier.
4. Improper fertilizer management
Poor seedling quality, poor seedling quality, plus improper fertilizer and water management can also lead to early heading in rice. For example, when fertilizing, nitrogen fertilizer is applied too late, or the application is insufficient, causing weak plant growth and inhibited growth, so that the main stem enters reproductive growth ahead of time and early heading occurs.
Control method: When fertilizing, it must be applied according to the soil and rice growth conditions. It must be applied sufficiently and early, and attention must also be paid to the rational application of nitrogen, phosphorus, and potassium fertilizers.
The above are the causes of early heading in rice and the control methods brought to you by Qinong Net. The content about early heading in rice is introduced here. We hope it can help you. If you want to learn more, please stay tuned to Qinong Net.