Key points for management of high-yield cultivation of fertilizer and water in rice

The application of high and low fertilizer water in high yield of rice is the core. The application of fertilizer and water should be determined according to the characteristics of fertilizer demand, soil fertility and planting time. Generally 100 kg of rice needs pure N 2 kg, pure P 1.2 kg, pure K 1.5 kg. Special application measures for fertilizer and water:
First, in the transplanting of rice for 5-10 days, timely application of fertilizer, the application of N fertilizer accounted for 85-90% of N fertilizer in the field, P fertilizer accounted for 100%, potassium fertilizer accounted for 30%, to ensure rice seedling plant 25-30 In days, the number of effective stems is around 28-32 million.
Second, in the middle and late growth period, the main application is to apply the panicle fertilizer. The application of panicle fertilizer is generally 45-50 days after planting in the field. The application of panicle fertilizer depends on the variety, the soil fertility, the amount of fertilizer used in the early stage, the size of the seedling group, and the color depth. The soil fertility is below medium, the amount of fertilizer used in the early stage is insufficient, and the small field is the focus of applying panicle fertilizer. It is required to apply 5-8 kg of urea and 10-15 kg of potash. The application of ear fertilizer depends on the application of seedlings, and the application of the growth potential should be repeated. The benefits should be less or not applied. If the growth is good, the population is large, the leaf level is deep, and the fertilizer is used in the early stage, no fertilizer will be applied, and potassium fertilizer will be applied. The potting fertilizer will be 15-20 kg. It is necessary to adjust the nitrogen nutrient metabolism of rice plants in a timely manner, balance nutrients, and achieve robust growth.
Third, the water slurry management: in the early stage in the shallow water to send the tree, enough to timely remove the water to dry the field. Sun-method method: It can be re-dried in the mud field, and the white roots of the skin layer are exposed to the skin, and the color level is suitable. The bottom of the sandstone can only be used to dry the field, and the soil is slightly harder. In the middle and late stages, the management of water slurry should be shallow water and humid, and the dry and wet management should be managed in the later stage. Reach the roots and leaves to increase weight and gain.
The rice growth period prohibits the management of deep-water seedlings, resulting in poor root development of the rice plants, premature senescence of the plants, and decreased grain weight.