Spring has an important impact on agricultural production activities. Spring wheat enters the jointing stage, and in the north, there is little rain in the spring to catch the water and the joint fertilizer.
Jointed fertilizer is a key top dressing for high-yield wheat. Wheat grows vigorously during jointing stage. It has long stems and leaves, and differentiates the ears of wheat. It requires more nutrients. At this time, grasping fertilization can increase the number of spikes and seed setting rate. Jointing fertilizer is mainly applied to quick-acting nitrogen fertilizer. The appropriate amount and appropriate time for jointing fertilizer should be classified according to the condition of the seedlings and the situation of the land. It is necessary to prevent the loss of premature aging and reduce the production of small and small grains, and to prevent over-fertilization, causing lodging and reducing production. From the appearance of high-yielding wheat, it is normal to have leaf color fading during jointing stage. It reflects that wheat has transferred from vegetative growth to reproductive growth stage, and central leaves should not grow. Therefore, when the leaves of this wheat group are faded, it is also the most suitable when the first section of the base is elongated to a fixed length. At this time, the base fertilizer not only does not cause lodging, but is conducive to strong stalks and large ears; while the seedlings are too strong, the leaves are still green, and the large and drooping wheat fields can be applied or not delayed until the leaves are chlorotic. Otherwise, the group will become too large and the stems will be weak and cause lodging to reduce production. It can be seen that wheat jointing fertilizer is very important, and the mastery of fertilization technology is very important.
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The principle of application of winter wheat jointing fertilizer is: the classification of the soil due to seedlings:
First, for the wheat fields with severe drought, yellow spotted seedlings and dead seedlings, the soil is immediately watered and preserved immediately after the soil is thawed, and the principle of nitrogen fertilizer is used for topdressing. When returning to green, first apply urea 5~7 kg to promote early seedling growth. When the jointing is to be carried out, the nitrogen fertilizer should be applied according to the appropriate amount of seedlings; the wheat field suitable for two urea application is also the irrigated wheat field with the total stem number less than 450,000 before the greening, and the second time after the spring is followed by the watering in the jointing stage. ~ 15 kg of urea.
Second, the growth of the seedlings Wheat irrigated before turning green mu total stem 45 to 600,000, binding of water up to 14 mu recovery of urea 10 kg. And reviving growth of the seedlings have reached the total stem 60 mu prior to 800,000 wheat, nitrogen should be implemented after the shift, until the wheat seedling jointing chlorotic groups, and then watering fertilizer, urea Mushi 12 to 15 kg.
Third, dry wheat field, to suppress binding to draw hoe, mention moisture soil moisture, drought resistance higher grain itself. Spring soil as early as possible back to the pulp or rain, with either a fertilizer or open Summer into urea 5-7 kg.
These are the main points fertilization wheat jointing stage, for your reference, hope can help to you. Huinong School has more relevant agricultural technology knowledge, and continue to pay attention to the Huinong School to answer questions during the planting process.
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