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Français- What is the rejuvenation period of rice?
After the rice is transplanted, it will generally turn from green to yellow, and then from yellow to green. This period is called the greening period. When the seedlings turn green in machine transplanting, they will give birth to 4 leaves, so they are also called greening leaves. The leaf length is 11cm and the plant height is 17cm. Around, the number of stems should have 10% of 1 leaf tiller tip.
- How to use greening fertilizer for rice?
After transplanting, it is necessary to apply rejuvenation fertilizer. It is best to use Shanghai special fertilizer immediately when transplanting. Machine transplanting can use Dongfeng Jingguan with side deep diagnosis fertilizer. cost.
After the application of greening fertilizer, the paddy field was kept in shallow water. It is beneficial to the decomposition of fertilizers and the division of seedlings. It is not recommended to release water in the field after applying the green fertilizer, let it fall naturally. Then release the shallow water muscle.
- How to choose a juvenile fertilizer?
The most important feature is "fast absorption", followed by "long-lasting effect". It is not recommended to apply urea alone as a greening fertilizer.
Disadvantages of using urea alone:
1. When urea dissolves in water, it will absorb a lot of heat, reduce the water temperature of the paddy field, and affect the greening of the seedlings;
2. Urea is an amide nitrogen fertilizer, which must be converted into ammonium nitrogen fertilizer to be absorbed by the seedlings in large quantities, and the length of the conversion time is affected by the soil, temperature and water, and also affects the greening of the seedlings.We can use the method of ammonium sulfate + urea to apply the greening fertilizer
1. Ammonium sulfate is not affected by low temperature, the absorption rate is relatively fast, but the lasting period is relatively short;
2. Although urea reduces the water temperature, it has a longer duration of effect;
3. When the two are used together, the fertilizer effect can be absorbed quickly and long.
- How to use "green fertilizer" in rice?
There is no transplanting process for rice, and there is no obvious greening stage. According to the developmental stage of rice, we can use the analogy of transplanting rice. It is necessary to apply "greening fertilizer" in the early stage of seedling distribution to increase the yield of cooked rice.
The application period of direct seeding rice is 3 leaves and 1 center to 4 leaves and 1 center. Before fertilization, keep a 5 cm water layer in the paddy field. At this time, the base fertilizer applied before the live broadcast can no longer meet the growth and development of the seedlings. We need to apply fertilizer in time to meet the nutrients of the seedlings.
- How to choose "returning green fertilizer"?
The nitrogen fertilizer in urea can be quickly absorbed by the seedlings, and the effect is fast, but urea can easily lead to the surge of the flag leaves in the middle and late stages of the seedlings, and the low fiber degree of the plants, which is easy to cause rice sheath blight, rice blast, rice planthopper and lodging, especially direct seeding rice. The ventilation itself is not good.
We can use compound fertilizer + urea to apply "returning green fertilizer".
Compound fertilizer can ensure the nutritional needs of the seedlings in the middle and late stages, promote the robustness of the seedlings and prevent lodging. Generally, 40 catties of compound fertilizer + 10 catties of urea is applied at one time per mu. It is best to apply it before 41 cm. Too late will affect the tillering and greed of the seedlings, cause pests and diseases, and cause yield reduction.
