How to Improve Rice Water Management
Through water management, it can not only achieve the coordination of soil gas supply and fertilizer supply capacity, but also improve the temperature and humidity of rice growth, establish a microclimate favorable to the growth of rice, and at the same time have the supporting role of exterminating and weeding. The key points for different cultivation methods, different growth periods, specific weather conditions, rice plant specific conditions, and pesticide application and weed control are proposed as follows:
1. Transplanting early rice, early, middle and late rice throwing hoe, early, middle and late rice seedlings should be spent flower mud; medium and late rice should be transplanted deep water 3-5cm? Live; live yijing no water layer.
2, using herbicides, should maintain a thin layer of water? 2cm) 4-5 days, such as water in the field, to slow irrigation. Every time fertilization, there should be a thin layer of water, if you want to water, it should be 1-2 days after being able to dry.
3, early rice appeared low temperature (less than 15 °C), should be deep-water irrigation (5cm) seedling protection; early rice during the flowering period of 28 °C above and the late rice during the flowering period of more than 32 °C, to irrigation 6cm deep water layer.
4. The insecticides (fly locusts, aphids, etc.) should be filled with thin water, especially non-corporating pesticides (touching, fumigating pesticides such as dichlorvos, etc.) to establish the water layer; for older locusts, during the application of pesticides To combine irrigation deep water.
5. Wet seedlings and direct-seeded rice should be kept moist in the period from sowing to 3 leaves, so that the field is not white, no cracking, no irrigation.
6, the emergence of frozen seedlings, root poisoning (black root) should be drained more exposed fields.
7, the flooding period of the field more than 5 days, to drain the field.
8, booting stage, heading flowering stage, filling period should be intermittent irrigation to keep the soil moist.
9. In the tillering period, thin water irrigation should be used in combination with light-exposed fields, and the number of planned seedlings should be drained to expose the fields. For the tender green rice, as well as the growing plots, to increase the exposure of the open field, can be exposed around cracking about 1cm, the middle of the field does not fall into place, faded leaf color.
10, early rice should be cut off water 7-10 days before harvest, mid-late rice should be cut off 5-7 days before harvest.
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