Appropriate and appropriate drying of the field is an important technical link for rice yield increase. First, it can promote the rapid extinction of the late tiller, so that the nutrient concentration can accumulate to the effective tiller and increase the tillering rate. Second, it can promote root development, improve root vigor, and plant the plants after drying. The number of roots increases, and the number of black roots decreases. Third, it can inhibit the growth of aboveground parts, accumulate carbohydrates in stems and sheaths, increase the hemicellulose content in stems and sheaths, and increase the lodging resistance of plants. Fourth, it can dredge soil. Air, remove reducing toxic substances in the soil, improve soil physical and chemical properties, and improve rice quality. First, the principle of drying the field The rice field should adhere to the principle of “the seedlings are not equal, the time is not equal to the seedlingsâ€. Sunshine can neither be too early nor too late. The morning sun will affect the tillering, and the late drying of the field will affect the differentiation of young ears. Therefore, the sunning field should be carried out in the late stage of rice tillering until the ear is differentiated. The field should be started when the number of seedlings reaches 80% to 90% of the planned number of seedlings. This is because the first 23 days of the field, the seedlings continue to divide, and when the field is light to heavy, the tillers will stop. Only in this way can the total number of branches be controlled within the planned number of seedlings to achieve the purpose of controlling the seedlings in the field. Second, drying time The length of the drying time should be determined by the weather. For example, during the drying of the field, the temperature is high and the air humidity is small. The number of days in the field should be less; if the temperature is low and the humidity is high, the number of days in the field should be more. In addition, the field should be determined according to the water source conditions and the supporting conditions of the canal in the irrigation area. It should be avoided that the irrigation after the drying of the field is not timely and affects the normal growth of rice. Third, the degree of drying the field The degree of drying the field is light and heavy. The light drying field is generally dried for 57 days. The soil in the middle of the field is thick and the feet are not trapped. The field edge is chicken claw crack, and the rice leaf color is slightly lighter. Generally, it takes 71 days to dry, and there is a 35 mm wide crack in the middle of the field. The soil on the side of the field is slightly white, the color of the rice leaves is faded, the green color is green, and the leaves are straight as a sword. As for the extent to which the rice fields are exposed, it is also appropriate to use the fields and the seedlings. It is generally a thick green field with strong leaf color, a strong fertile field, and a cold-soaked field, a low-lying field, and a clay field. It is light-green, green, grows, and has few fertilizers, and high-field, sandy soils are light. show. Because cold soaking fields, low-lying fields, fertilizer fields, and clay fields have strong water-holding capacity and are not easy to be sun-dried, they must be re-dried; sand-soil fields and thin fields have poor water-holding capacity, and water leakage is strong, and it is not suitable for heavy drying. Fourth, technical measures after drying the field After the sun-dried field, 23 kg of urea should be applied for 667 square meters (1 mu) for jointing and panning fertilizer, and the “preservative water†should be filled. It is not advisable to cut off the water until the heading, so that the water and fertilizer are sufficient, so as to ensure the stable yield of rice. ,high yield. Real-Time Fluorescence Quantitative PCR Systerm This RT-PCR system is a necessary equipment for quantitative analysis of 2019-nCoV in big quantity during the COVID-19 pandemic, and this real-time PCR system can also be widely used in various fields such as scientific research, clinical detection and diagnosis, quality and safety testing, and forensic applications. real time pcr equipment,real time pcr system,real time pcr device,real time pcr machine,rt pcr instrument Shenzhen Uni-medica Technology Co.,Ltd , https://www.unimedicadevice.com
Key points for increasing production of rice in the field