Rice seedlings develop from the second leaf to the third leaf, about 10 to 14 days, and experience two leaf ages. The endosperm nutrition has been basically exhausted, which is the seedling lactation period, and the second leaf of the seedling grows faster. The third leaf grows slowly. Management focus Control the stems and leaves of the seedlings and promote the robust growth of the roots, so that the seedlings can reach the standard of strong seedlings. To strictly control the temperature and moisture, the temperature of 1 cm below the first height of the seedling is controlled at 22 to 25 °C in the 2 leaf stage, the maximum is not more than 25 °C; the maximum temperature is not more than 25 °C in the 3 leaf stage between 20 and 22 °C. The minimum temperature is not lower than 10 °C. In this period, it is necessary to set up a large ventilation and ventilating seedlings for ventilating. To master the principle of "low temperature is sick, high temperature is terrible", when it starts to be sunny after continuous low temperature, it is necessary to open the ventilation early to prevent the emergence of bacterial wilt (or blight); the high temperature weather should be ventilated early to prevent the high temperature from being long; The leaves of low temperature chilling seedlings are damaged by freezing, and should be ventilated before 8:00 in the morning to alleviate the freezing damage of the leaves. The seedlings in the 2.5 leaf stage gradually increase the ventilation according to the temperature. When the minimum temperature is higher than 10 °C, it can be ventilated day and night. Rice blight is the main disease that threatens during the field, and it occurs to varying degrees every year. Mild occurrence causes the seedlings to die and cause death, which leads to insufficient seedlings, delays in farming, and affects rice yield. However, some farmers used non-standard drugs during the spraying process, and did not wash the seedlings after spraying, resulting in seedbed alopecia seedlings. Precautions for spraying rice seedlings and preventing diseases: 1. Spraying pots are strictly prohibited to be mixed and must be washed before each use. 2, the need to wash the seedlings must wash the seedlings, anti-disease drugs must wash the seedlings. 3, spraying time in the morning or evening. 4. Test the spraying speed and the amount of water sprayed in advance to ensure the uniformity of spraying. 5, the height of the nozzle should be 70-80cm away from the seedling to ensure the atomization effect, which can effectively reduce the phytotoxicity caused by excessive concentration. 6, to prevent heavy spray leakage. 7, must be used to standard medicine, the amount of medication must be standard. 8. When the medicine is used, the amount of water should be sufficient to prevent the concentration from being too large. 9. When you are in the medicine, you should first exchange the mother liquor and stir evenly. 10, when the medicine should be in the air, to prevent poisoning. The life of rice seedlings is relatively fragile. At this time, it is easy to cause diseases, or the temperature is high and burned, so you should check the condition of the seedlings in time, pay attention to the moisture and temperature of the seedlings. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone Ppe Nitrile Gloves,Aql4.0 Industrial Gloves,Ppe Non-Medical Equipment,Disposable Powder Free Nitrile Gloves Puyang Linshi Medical Supplies Co., Ltd. , https://www.linshihealths.com
How to manage rice seedling stage