Ding Hongqiang, Chenqiao Town, Jinhu County, said on July 1 that the hybrid rice planted and transplanted on a large area recently had yellowing of the leaves, blackening of the roots, and yellowing. It is understood that this phenomenon occurs mainly in the field of orange stalks returned to the field, the symptoms appear about 1 week after the rice transplant. The seedlings used were dry seedlings and soon after they were planted. There are a lot of bubbles in the field and there are a lot of bubbles coming out of the hand to insert into the field, and there is bad odor. He asked why the above situation occurred in rice and how to rescue it. According to Ding Hongqiang’s report, rice is likely to be harmed by toxic substances such as hydrogen sulfide. In the field where the straw is returned to the field, the straw in the field is generally rotted 7-10 days after the upper water, and the straw can be completely rotted after about one month after the water supply. Straw rot will consume oxygen in the soil. In the case of water on the field, the soil in the field is often deprived of oxygen. Under anaerobic conditions, straw decay produces toxic gases such as hydrogen sulfide. Hydrogen sulfide has a rotten egg smell and has a strong poisoning effect on rice roots. The roots of the damaged seedlings are yellow, and when they are severe, the roots turn black and rot and the leaves yellow and die. Straw returned to the field, should pay attention to observation after rice transplanting, found that there are a lot of air bubbles in the field, especially when smelling with smelly eggs, it should be timely drainage of the open field, so that the oxygen in the air into the soil, oxidation of which sulfide Hydrogen and other toxic substances make it lose its toxicity. If the leaves of the seedlings become yellow and then they die after dehydration, the roots of the seedlings have been severely poisoned and difficult to recover. Even if they recover, their growth and delivery will be seriously affected. The effective tilling period of transplanted rice is short, and it usually enters into the effective termination of the tiller in mid-July. If the early delivery is not timely, it will be difficult to ensure sufficient groups, which will eventually lead to insufficient number of panicles and low yield. For the above-mentioned damaged fields, it is imperative to drain water. It is best to open up the productive ditch in the field so that the field can be discharged as soon as possible. Considering that the root system of rice is damaged and its absorption function is declining, it is better to apply growth regulators such as sodium nitroprusside (Adocazone, which promotes root growth and seedling recovery) as soon as possible after drainage to promote rice recovery. Plus 1% potassium dihydrogen phosphate and 1% urea mixed spray. Afterwards, for the slow recovery of the plots, appropriate application of compound fertilizer should be adopted to promote the delivery, and appropriate delays should be made to postpone the field. Gradually, the panicle-heading and booting fertilizers promote the shaking of tillers, and ensure that there are sufficient panicles and yields. loss. Laryngoscope Fibre Optic,Medical Bulb Laryngoscope Set,Lightbulb Laryngoscope,Conventional Adult Bulb Laryngoscope Jiangsu Yongle Medical Technology Co., Ltd. , https://www.jsylmedical.com