Guiding Opinions on Management Techniques of Middle and Late Rice in Northeast China

At present, rice in most parts of Northeast China has entered the heading stage and some of the same ears, and its growth and development is about 5 days earlier than normal. The overall growth is better. Since July, high temperature and high humidity weather is conducive to the occurrence of diseases such as rice blast and sheath blight. In addition, the number of pathogens is high, and the area of ​​susceptible varieties is large. If the rainy and humid weather continues in the later stage, rice blast may occur. To this end, the Rice Experts Guidance Group of the Ministry of Agriculture recommends that all localities strengthen the field management of rice production in the middle and late stages of production, control water and promote roots, properly apply nitrogen fertilizer, focus on disease prevention and control, and ensure a good harvest.

First, prevent diseases such as rice blast and sheath blight. It is necessary to attach great importance to the prevention and control of rice blast disease, which is mainly based on panicle neck mites, based on prevention. Whether it is a disease-resistant variety or a susceptible variety, whether it has been used in the prevention and treatment of leaf blast disease in the early stage, it is necessary to make a rice break period and heading. The final stage is to control the neck and neck. Can use 20% tricyclazole per mus 100g or 40% rice glutinous rice (Fuji No. 1) emulsifiable concentrate 100 liters or gram temperature dispersion 100 ml, spray 50-60 kg with water; or use Bacillus subtilis (100 billion live Spore), 10 grams of water with 20 grams of water for fine mist spray. At present, it is the best time to prevent sheath blight, and we must pay close attention to prevention and treatment. You can use 5% Jinggangmycin water, 50ml spray per 100ml of water, or 100ml with 5% Jinggangmycin water and 150% 200ml or 25% triazolone wettability. Powder mixed control.

The second is to apply good grain fertilizer. At present, the yellow-leafed rice fields have low chlorophyll content after emergence, which will affect the filling rate, and appropriate application of granular fertilizer. Generally, about 25 kg of urea is applied per hectare. In the first and middle stages, the application of nitrogen fertilizer or soil fertility and dark green leaves should be combined with the prevention and treatment of panicle neck sputum and the application of nutrients such as potassium dihydrogen phosphate to promote normal growth and development.

The third is to manage the water layer. This year, the rice has been transplanted with high temperature, and the amount of hydrogen sulfide and methane in the soil is large, which seriously affects the development of roots. Paddy fields before and after the heading stage should adopt a dry and wet alternate water layer management method to increase the air in the soil, improve the root activity and prevent premature aging.