The main reasons for the yellow rooting of rice seedlings are the following: 1 and soil alkalinity is inappropriate: rice is suitable for growth in micro-acid soils, and if soil is acidic or alkaline, it can affect the absorption of seedlings to nutrients, resulting in yellow roots. Inadequate soil fertility: the lack of essential nutrients such as nitrogen, phosphorus and potassium in the soil can lead to poor growth and yellow roots. 3. Over-water: the long-term accumulation of slabs or slabs and low-lying water can cause soil aerobics to deteriorate and roots to lack oxygen, leading to yellow roots. Paraquat: one of the major ills of the paddy period, which resulted in brown spots in the seedling base, which gradually spread and decayed, leading to yellowing. 5. Inadequate application of fertilization: excessive or uneven application of fertilization results in yellow roots. In graphics, it may be associated with local over-drive or stand dead. The prevention of yellow rooting of paddy seedlings is as follows: 1, seedbed soil is acidized: ph adjusts to about 5 - 5. 5 to make it suitable for rice growth. 2. Reasonable fertilization: based on the fertility of the soil, it is scientifically reasonable to apply the fertilisation equally, ensuring that the soil is adequately nourished and not in excess of the amount. 3. Reasonable irrigation: to ensure good rooting by opening a ditch around the trunk, keeping it open, ensuring fresh water, moderate field moisture, avoiding long-term water accumulation, and maintaining soil moisture before the 2-3 leaf period, especially by plugging a soft disk. After a wet trifle, the shallow water layer can be properly built. Paraquat: seed disinfection prior to seeding and can be fertilized with herbicides such as dikeson. In the early stages of the disease, more rice cultivation techniques can be learned through the application of agents such as methadone, virulence, etc., and can be accessed on the “spring rice” wx public or “spring rice” shivering signs。
