How to manage rice during the tillering stage? Latest key points explained
When rice enters the tillering stage, it is the critical period for determining effective tillers. This is the foundation for achieving high yields, so management of the rice tillering stage is extremely important. In order to cultivate strong seedlings and lay the foundation for a bumper harvest, management measures for the tillering stage must be carried out well. So how should rice be managed during the tillering stage? Follow the editor and take a look.
1. Scientific water management
After rice transplanting, the field water level should be kept at 3-4 cm, so that the field forms a relatively reasonable environment for heat and moisture retention, prompting new roots to sprout and the seedlings to quickly turn green. After entering the green-turning stage, the seedlings also enter the tillering stage. At this time, shallow water irrigation should be used, generally keeping the water level at 2-3 cm. When the rice tillers reach the expected number of tillers, the field should be drained and sun-dried in time. Sun-drying the field can play a role of first suppressing and then promoting. It has a good effect on controlling the rice population, promoting the transformation of rice from vegetative growth to reproductive growth, and cultivating large panicles with many grains. For sun-drying the field, the principle is to sun-dry heavily for clayey fields, low-lying fields, and overly fertile fields, and to sun-dry lightly for sandy fields and lean fields. Generally, sun-dry until small cracks appear on the field surface, the feet do not sink when stepped on, the leaf color fades, and the leaves stand upright.
2. Apply tillering fertilizer early
The fertilizer demand of rice gradually increases after the green-turning stage. At this time, the root system is mostly distributed in the surface soil, and the nutrient supply is insufficient, so tillering fertilizer should be applied early. Generally, 5-6 kg of urea is applied per mu, spread evenly, and a shallow water layer is maintained. Fertilization should follow the principle of applying less to fertile fields and more to lean fields. Tillering fertilizer is generally applied immediately after the green-turning stage, but fertilization should not be flooded indiscriminately. Fertilize according to the seedlings. First apply 80%, and for the remaining 20%, look at the field growth. Apply less where growth is good and more where growth is poor. After fertilization, maintain the water layer and do not drain. Irrigate again after it dries naturally.
3. Pest and disease control
The main control target is leaf blast. In the early stage of leaf blast, 30 g of 75% tricyclazole or 100 ml of 40% Fuji One emulsifiable concentrate can be used per mu, mixed with 30 kg of water and sprayed evenly. The main insect pests are rice stem borers and rice planthoppers. For the control of rice stem borers, generally 100 ml of triazophos emulsifiable concentrate or 50 g of insecticide per mu is used, mixed with 30 kg of water and sprayed. For the control of rice planthoppers, 20 g of imidacloprid wettable powder or 100 ml of dichlorvos per mu is mixed with 30 kg of water and sprayed.
The above is an introduction to the key management points of the rice tillering stage. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.