Key Management Techniques for Rice at the Heading and Flowering Stage
The heading and flowering stage is the most critical period in rice growth, as it affects both the yield and quality of the rice. If management is improper at this time, it may lead to reduced yield or even total crop failure. So how should rice be managed during the heading and flowering stage? Come to QinNong Network to learn about the management techniques for rice at the heading and flowering stage.
1. Water management
The heading and flowering stage is the period of greatest water demand for rice, and the crop is extremely sensitive to water at this time. The most important thing during this period is to avoid water shortage and to ensure a sufficient water supply. At minimum, a water level of 3 cm must be maintained so that the rice can absorb and transport nutrients, increase photosynthesis, and promote spikelet differentiation. In low-temperature or high-temperature areas, the water level can be appropriately raised to regulate temperature and prevent high or low temperatures from affecting heading. During the flowering stage, long periods of deep-water management should be avoided, as this can cause premature root senescence. Therefore, at this time the soil is generally kept moist with wide coverage to promote healthy rice growth.
2. Fertilization management
The heading and flowering stage of rice is related to yield and quality, so special attention must be paid to fertilization. Ear fertilizer should be applied judiciously, with nitrogen, phosphorus, and potassium fertilizers used in combination, and fertilization should be based on rice variety, climate, soil, and other conditions. Generally, early-maturing varieties do not need ear fertilizer, while mid- to late-maturing varieties should be given an appropriate amount of ear fertilizer. When applying ear fertilizer, special attention should be paid to sandy soils with low fertility and poor fertilizer retention. In addition, if the "second black" is not obvious at the booting stage, flower-preserving fertilizer can be applied to improve the seed-setting rate. If symptoms such as yellowing appear on the leaves, foliar fertilizer can be applied as a supplement to prevent premature leaf senescence and achieve the goal of high yield.
3. Prevention and control of pests and diseases
Prevention and control of pests and diseases during the heading and flowering stage of rice is essential. The main diseases are sheath blight, rice blast, rice false smut, and bacterial leaf blight, while the main pests are rice planthoppers, rice leaf rollers, and stem borers. Agricultural control techniques and ecological control techniques should be combined. For diseases, prevention should be the main approach; for pests, trapping, capture, and the use of natural enemies can be adopted, with pesticides used as little as possible. Even when pests and diseases are severe and there is no alternative, highly effective and environmentally friendly pesticides should be selected, and the application rate and method should be properly controlled for treatment.
4. Rational use of pesticides
Generally, when pesticides are used according to the instructions, including the recommended pesticide, the appropriate timing, and the method, pesticide residues will not be caused. However, if the regulations are not followed and excessive or repeated applications are made, pesticide residues will exceed the standard and harm people's health. During the heading and flowering stage, rice is extremely sensitive to pesticides. If fungicides or insecticides with relatively high concentrations are sprayed improperly at this time, it can cause abnormal growth and rice pollen abortion, leading to total crop failure. Therefore, the use of pesticides must strictly comply with the standards for the safe use of pesticides and the guidelines for the rational use of pesticides, and pesticides must be used rationally.
The above are the management techniques for rice at the heading and flowering stage brought to you by QinNong Network. We hope they can help you. If you want to learn more about rice, please stay tuned to QinNong Network.