How to fertilize wheat high-yield fertilization strategy during wheat jointing and booting stage
Wheat jointing and booting fertilizer is the most important fertilizer in the whole life. The jointing and booting stage is also the key period for determining the rate of seed formation and seed setting of wheat, and winning the large ear of strong stalk. It is the second peak of fertilizer demand in wheat. The amount of fertilizer needed during this period generally accounts for about 50% of the total fertilizer requirement. Scientific pursuit of jointing and booting fertilizer can ensure the growth of wheat and form large ears. After the spring, the temperature gradually rises. Once the wheat is generally raised, it immediately enters the jointing and booting stage, which is an excellent period for applying the jointing and booting fertilizer.
According to the study, for every 100 kg of wheat grain produced, about 3.1 kg of pure nitrogen, 1.1 kg of phosphorus pentoxide, and 3.2 kg of potassium oxide are needed. Before wintering, the demand for nutrients in wheat is not much. After wintering, as the temperature rises and the wheat population increases, the nutrient uptake increases rapidly until it is heading and flowering. From jointing to flowering, it is the peak period of wheat absorption and nutrients. 55% of nitrogen, 80% of phosphorus and 90% of potassium are absorbed at this stage.
After flowering until maturity, it is necessary to absorb 28% of nitrogen and a very small amount of phosphorus, and basically no longer absorb potassium. At present, the basis of wheat seedlings is better, but the proportion of Wangchang seedlings and weak seedlings is high everywhere. Therefore, jointing and panicle fertilizers must be applied reasonably according to the ground, seedlings and seedlings.
The application time is determined according to local conditions. Wheat jointing and booting fertilizer should generally be faded in the leaves of the group, small tillers die, the base is fixed at the first internode, and the second internode is applied. The normal growing wheat field is generally in the middle and late March.
For late-wound wheat, late-winter growth, and poor growth of individual crops, and wheat fields with yellow leaves and heavy freezing, should be topdressed early in mid-March, which can effectively increase the number of grains. Dividing into ear, ensuring a sufficient number of turns per acre also has a certain effect. The color of the leaves is faded slowly and the fertilizer is applied. In the early spring, the field of returning to the green fertilizer is applied. The amount of fertilizer can be reduced according to the condition of the seedlings, and the time for the application of the jointing fertilizer can be appropriately postponed.
The amount of fertilization should be determined due to the seedling system. Wheat jointing and booting fertilizer refers to the fertilizer applied from the jointing to the tip of the flag leaf. At the time of jointing, if the base fertilizer and the wax fertilizer are applied less, the jointing fertilizer should be applied as appropriate, and about 5 kg of urea and a certain amount of phosphorus and potassium fertilizer can be applied per mu.
At the time of jointing, the group is too large, the leaves are dark green, the leaves are drooping, the small cockroaches are not retreating, and the yin is heavier, indicating that the growth is too strong. For this kind of wheat field, it is necessary to properly control the fertilizer, when the leaf color appears faded. If the leaf color has not turned light, it will not be applied.
At the time of jointing, the group development is insufficient, the yellowing is too early, the leaves are narrow, thin and straight, and it is a typical lack of fat. It should be topdressed as early as possible, combined with fertilizer and water, and actively promoted, 6-8 kg of urea can be applied per acre. Combined with rainwater fertilization, the fertilizer can be infiltrated into the soil and the utilization rate can be improved.
The ratio should be determined according to the species. In general, varieties of dwarf stalks, fertilizer-resistant, and lodging-resistant varieties can be applied in appropriate amounts; varieties with high stalks and not resistant to fertilizers should be applied less. Insufficient bottom fertilizer, the field with poor ground force should be applied more appropriately; the ground force fertilizer, the field of the foot strength, can be applied less.
Generally, the joint fertilizer is to use special compound fertilizer plus urea; the ear fertilizer can only be applied with urea to achieve precise fertilization. Generally, the medium-gluten wheat is fertilized with 4-5 kg ​​of pure nitrogen, 3 kg of phosphorus pentoxide and 4 kg of potassium chloride per mu. Usually 45 to 30 kg of 45% NPK compound fertilizer per acre.
Applying panicle fertilizer, that is, using 2 to 3 kg of pure nitrogen per acre, about 5 to 7 kg of urea per acre. Weak gluten wheat advocates the one-time application of jointing and booting fertilizer, that is, 2.6 to 2.8 kg of pure nitrogen per mu, 1.5 kg of phosphorus pentoxide, 2 kg of potassium oxide, and generally 45% of NPK compound fertilizer per mu. 15 kg. If the amount of nitrogen fertilizer used in the early stage is large, the joint fertilizer should be appropriately reduced.
The root activity of wheat was significantly decreased in the middle and late growth stages, and the trace element fertilizer was basically not absorbed from the soil. However, the demand for micro-fertilizer in wheat in the middle and late stages is very important. It can improve the efficiency of photosynthesis and promote the transformation of rigid seedlings. It is necessary to grasp the combination of spraying and disease prevention in the middle and late stages of wheat, and spraying the trace element foliar fertilizer to improve the yield. The increase in production can reach 3% to 5%.
This article URL: How to fertilize wheat high-yield fertilization strategy during wheat jointing and booting stage
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