Spring water and spring fertilization have a great impact on wheat yield. For example: wheat is too thick, too thin, or has fallen in the late growth period, indicating that there is a problem with the first fertilizer time in spring. For example, if the wheat is late and ripe, and the seeds are thin, it means that your spring water and fertilizer are not reasonable. So how to carry out the fertilizer management of wheat in spring is scientifically reasonable?
First, we must accurately grasp the first fertilizer management time
In the greening period, you should water the wheat seedling water, and pay attention to the watering after the pouring, in order to promote the temperature. After watering in the greening period, due to the low temperature, the ground temperature will rise slowly, the humidity will be high, the disease in the wheat field will be aggravated, and the growth of wheat is relatively slow. Because wheat grows less water at this time, watering is not good for wheat growth. Re-green fertilizer can effectively promote wheat growth, increase spring tillering and promote ear formation. Therefore, the returning green water is suitable for wheat fields with severe drought, and the green fertilizer is suitable for the shortage of wheat fields.
Insufficient group of wheat fields should be poured into the water and applied to the body. The fertilizer water does not increase the total amount of tillers, but it can increase the rate of ear formation, thereby increasing the number of ears per mu. Therefore, the fertilizer water for the body is suitable for the wheat fields with insufficient population, the wheat fields with severe drought, and the wheat fields that have weakened in the spring before winter. For the moderate or large group of lyrical suitable wheat fields, getting up the water and fertilizer management will cause the group to be too large, the base section is too long, the middle leaves are too large, easy to fall and other adverse effects, so it is not suitable to use, and the wheat field that has been poured back to the green water is also Not suitable for use.
The main wheat field should be the first water and fertilizer management in spring during the jointing stage. The jointing stage fertilizer and water management can accelerate the polarization of the wheat field, promote the differentiation of small flowers, make the flag leaf broad and strong, improve the ability of resisting premature aging, and help to cultivate reasonable groups and strong individuals, and the significance of forming reasonable number of ears per ear and number of grains per ear. major. At the same time, the first fertilizer management in the jointing stage is also the key to reducing the number of watering in spring and promoting the high-yield technology of water-saving wheat. If watering and high-yield are low, then only watering that has little effect on wheat yield before the jointing is saved. .
Second, scientifically determine the amount of wheat topdressing in spring
In general, the amount of topdressing fertilizer in the wheat field is 15 to 25 kg in urea and 50 to 75 kg in carbonamine. The top dressing should be based on topdressing. The specific amount of use should be "four combinations":
The first is to combine the application of base fertilizer. If the amount of base fertilizer is as recommended in wheat planting, and the ratio of NPK is reasonable and the total amount is sufficient, then you can apply more spring fertilizer to achieve high yield. If the application of the base fertilizer of wheat is insufficient or the combination is unreasonable, especially if the application of phosphorus and potassium fertilizer is insufficient, then there is no need to chase too much nitrogen fertilizer to avoid waste and cause late maturity.
The second is to combine the seedlings. Before the winter, Miao Miao, because of the consumption of nutrients before winter, can chase some nitrogen fertilizer in the spring.
The third is to combine soil water retention and fertility. The sand leakage is poor in water retention and fertilizer retention, and the number of watering needs to be increased. In order to improve the utilization rate of fertilizer, it is necessary to divide the top dressing, and the total amount of topdressing can be appropriately increased.
The fourth is the need to combine management. If fertilization is needed during the regreening period, then at least two fertilizers need to be chased in the spring, so it is necessary to increase the total amount of spring topdressing.
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