How wheat spring and spring fertilizers and water are managed Spring and spring and spring fertilization has a great influence on wheat yield. For example: Wheat is too thick, too thin, or has fallen in late growth, suggesting that the first time in the spring is problematic. Another example is the late-maturing gluttonous wheat and thin grains. This shows that the amount of water and fertilizer in your spring is unreasonable. So how can the management of wheat and spring water be scientific and reasonable?
First, we must accurately grasp the first fertilizer management time
Returning to the green period, we must pour wheat seedlings, and pay attention to the plan after pouring, so as to improve the temperature and security. After watering in the green period, due to the low temperature, the recovery of ground temperature will be very slow, the humidity will be high, the disease in wheat fields will increase, and the growth of wheat will be relatively slow. Because at this time wheat has less water for its own growth, watering is not good for wheat growth. Returning green manure can effectively promote the growth of wheat, increase the tillering in the spring and promote the emergence of the ear. Therefore, returning Qingshui is suitable for wheat fields with severe drought conditions, and returning green manure is suitable for under-populated wheat fields.
Insufficient population In wheat fields, we must pour up water and apply body fat. The fat and water during the growing stage does not increase the total amount of tillers, but it can increase the percentage of spikes and thus increase the number of mu ears. Therefore, the fertilizer and water during the start-up period are suitable for wheat fields with insufficient population, wheat fields with severe drought conditions, and wheat fields that have weakened during the pre-winter season. For moderately suitable or large scales suitable for wheat fields, the management of water and fertilizers will cause the groups to be too large, the internodes of the bases to be too long, the central leaves to be too large, and the lodgings to be easy to fall. Therefore, it is not appropriate to adopt them. At the same time, the wheat fields that have been poured back to Qingshui are also Should not be used.
The main wheat field should be the first water and fertilizer management in the jointing period in spring. Fertilizer and water management at jointing stage can accelerate the size and polarity of wheat in the wheat field, promote the differentiation of florets, make the flag leaves broad and robust, and improve the ability to resist premature aging, which is conducive to the cultivation of reasonable groups and robust individuals. It is of significance for the formation of a reasonable number of ears per mu and grains per spike. major. At the same time, the first fertilizer management is also the key to reducing the frequency of spring watering in the jointing period and promoting the technology of wheat water-saving and high-yield production. In order to reduce watering and high yield, only the watering that has little effect on wheat yield before jointing is eliminated. .
Second, scientifically determine the amount of wheat fertilizer in spring
Generally, the amount of topdressing fertilizer in spring wheat field is 15-25 kg of urea, and 50-75 kg of carbonic amine can be used. The top-dressing top dressing should be based on top dressing. The specific amount to do "four combinations": First, combined with the application of base fertilizer. If the amount of base fertilizer is as recommended by us when wheat is sown, and the ratio of N, P and K is reasonable and the total amount is sufficient, then you can apply more fertilizer in the spring to strive for high yield. If the amount of base fertilizer in wheat is insufficient or not matched, especially if the application of phosphorus and potassium fertilizers is insufficient, then there is no need to chase too much nitrogen fertilizer, so as to avoid waste and cause late-maturing gluttony. The second is the combination of seedlings. Before the winter, Wang Miao, due to the consumption of more nutrients before the winter, can recover some nitrogen fertilizer in the spring. The third is to combine the ability of soil to retain water and fertility. Leakage of sand to the water and fertilizer is poor, the need for watering more times, in order to increase fertilizer utilization, need to be top-dressing, can increase the total amount of fertilizer. The fourth is to combine management needs. If fertilization is required for returning to the green period, wheat will need to be replenished at least twice in the spring. Therefore, it is also necessary to appropriately increase the total amount of spring dressing.
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