This year in Hebei, Shandong, Henan and other places, due to the warm climate in the previous period, part of the early sowing of wheat fertilization is too much, there has been a problem of excessive wheat seedlings. The main manifestations of over-prosperity of wheat seedlings are: the number of leaves per plant is too high, and the development of wheat is too fast. Some wheat has 6 to 7 leaves. Some farmers find that the young wheat seedlings are fast growing. On the other hand, there are too many deliveries and too many groups. Because the wheat seedlings are over-prosperous, these overgrowth wheat seedlings are vulnerable to frostbite when the low temperature arrives in winter, and some species may even freeze to death. Before the winter wheat seedlings require stable and robust, not over-expectation, wheat seedlings prosper before the winter will consume a large number of stored substances in the body, to the spring after the spring does not cause growth retardation. By then, if topdressing and other measures fail to keep pace, a large number of births will be degraded, which will easily lead to a reduction in production. Therefore, it is not a good sign that wheat sprouts are too busy before the winter.
Expert Comments: For the problem of growing winter wheat seedlings can generally take the following three solutions.
One is to cut off the roots. Both the withdrawal and the partial root system can be cut off to achieve the purpose of restraining the growth of wheat sprouts.
The second is suppression of wheat seedlings. However, this method will hurt the delivery before the winter and it is necessary to master the moderation.
Third, spray growth retardants. This is a simple and effective method at present, but we must carefully select the appropriate pharmaceuticals, we must pay attention to choose to use the "three certificates" of a full range of drugs, otherwise it will not achieve the desired results, and even counterproductive. For the selection of retardant species, it is better not to use paclobutrazol for two reasons: one is that paclobutrazol has a long residual time on dry land and there is a potential safety hazard; the second is the risk of using paclobutrazol. The amount is slightly larger and it is easy to over control and the wheat seedlings completely stop growing, resulting in serious reduction of production. For this reason, paclobutrazol is not approved by the Ministry of Agriculture for registration on winter wheat crops.
At present, some chemical control experts believe that the use of Maiyefeng and CMC are relatively safe and effective. Taking Maiyefeng as an example, when wheat seedlings appear severely prosperous, 25-30 ml per mu are used; when the long growth is not serious, 15-20 ml per mu; water 25-30 kg, foliar spray Once, you can walk on both sides for spraying.
Finally, we must analyze the reasons for the growth of the wheat seedlings in order to prevent the emergence of wheat seedlings in the coming year. Apart from the high temperature, soil, fertilizer, water conditions and field management measures have a great influence. The situation of Mai Miaowang mostly appears in soils with high fertility and good lye, and wheat fields are prone to prolonged growth in fields where shallow basal fertilization and high-nitrogen compound fertilizers or basal fertilisers are used for large-scale nitrogen fertilizers. In addition, sowing date, the sowing of large wheat fields, there will be long wheat seedlings.
Case Tip: To avoid the prosperous winter wheat, it is necessary to grasp the appropriate sowing date and sowing volume. In the fertilization of wheat field, the base fertilizer and topdressing fertilizer are applied separately, and the basic fertilizer should be applied in a proper amount. In the use of retardants to control the prosperous growth of wheat, we must be careful to choose the appropriate type of retardant, strictly control the concentration, and spray evenly.
Expert Comments: For the problem of growing winter wheat seedlings can generally take the following three solutions.
One is to cut off the roots. Both the withdrawal and the partial root system can be cut off to achieve the purpose of restraining the growth of wheat sprouts.
The second is suppression of wheat seedlings. However, this method will hurt the delivery before the winter and it is necessary to master the moderation.
Third, spray growth retardants. This is a simple and effective method at present, but we must carefully select the appropriate pharmaceuticals, we must pay attention to choose to use the "three certificates" of a full range of drugs, otherwise it will not achieve the desired results, and even counterproductive. For the selection of retardant species, it is better not to use paclobutrazol for two reasons: one is that paclobutrazol has a long residual time on dry land and there is a potential safety hazard; the second is the risk of using paclobutrazol. The amount is slightly larger and it is easy to over control and the wheat seedlings completely stop growing, resulting in serious reduction of production. For this reason, paclobutrazol is not approved by the Ministry of Agriculture for registration on winter wheat crops.
At present, some chemical control experts believe that the use of Maiyefeng and CMC are relatively safe and effective. Taking Maiyefeng as an example, when wheat seedlings appear severely prosperous, 25-30 ml per mu are used; when the long growth is not serious, 15-20 ml per mu; water 25-30 kg, foliar spray Once, you can walk on both sides for spraying.
Finally, we must analyze the reasons for the growth of the wheat seedlings in order to prevent the emergence of wheat seedlings in the coming year. Apart from the high temperature, soil, fertilizer, water conditions and field management measures have a great influence. The situation of Mai Miaowang mostly appears in soils with high fertility and good lye, and wheat fields are prone to prolonged growth in fields where shallow basal fertilization and high-nitrogen compound fertilizers or basal fertilisers are used for large-scale nitrogen fertilizers. In addition, sowing date, the sowing of large wheat fields, there will be long wheat seedlings.
Case Tip: To avoid the prosperous winter wheat, it is necessary to grasp the appropriate sowing date and sowing volume. In the fertilization of wheat field, the base fertilizer and topdressing fertilizer are applied separately, and the basic fertilizer should be applied in a proper amount. In the use of retardants to control the prosperous growth of wheat, we must be careful to choose the appropriate type of retardant, strictly control the concentration, and spray evenly.
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