Winter wheat field management should be timely cultivating

Timely cultivating, warming and protecting. All kinds of wheat fields should be tightened before quenching and buckwheat loose soil. For wheat fields with large cracks in the field, they should be pressed first and then pressed to compensate for the cracks and prevent cold roots from freezing in the early spring. After the suppression, it can also be insulated to prevent or reduce the early death of frozen seedlings. Dryland wheat without watering conditions should be suppressed in time in early spring, which can play a role in ensuring cold protection.

Seedling grows, classification management. For the wheat fields where the soil is not deficient, do not rush to water and topdress when returning to green, and still raise the ground temperature by cultivating the loose soil, and promote the early growth of the seedlings. According to the special situation that the planting is generally late in 2011 and the soil moisture is good, it can be divided into the following types of management: First, the wheat field (or low-yield field) with moderate to small (less than 600,000 plants per mu) in the greening period. After returning to green, the seedlings can be planted for about 20 days, and the second leaf of the spring wheat is to be watered and topdressed before and after birth. The amount of topdressing can be controlled at about 40% of the total amount of topdressing in spring. The recommended amount of fertilizer is about 7 kg per mu, to promote the growth of tillers and the number of panicles. At the end of the jointing period (before and after the birth of the 5th to 6th leaves of Chunsheng), the second fertilizer management will be carried out. The amount of topdressing is about 60% of the total amount of topdressing in spring. The recommended amount of fertilizer is about 10 kg per mu, to promote the multi-grain weight of the ear and improve the quality. Second, the greening population in the wheat field of more than 600,000 plants per mu (or the high-yielding wheat field with good soil fertility) can delay the first fertilizer time in spring, and the seedlings are about 40 days later, until the late stage of wheat jointing (the fifth leaf of Chunsheng) Before and after the birth of 6 leaves, watering and topdressing are carried out. The amount of fertilizer applied in the spring can be applied once in this period. The recommended amount of fertilizer is 15-20 kg per mu. The third is for wheat fields that have been planted too late, the basic seedlings are too large (more than 350,000 per acre), and there is no tillering before winter. In spring, do not rush to water and fertilize. In early spring, the main reason is to keep warm. The first fertilizer management in spring can be postponed in the early stage of jointing. The amount of topdressing accounts for about 80% of the planned fertilization in spring, and the remaining fertilizer is applied along with water in the early stage of flowering. Fourth, for some wheat plants with high density and growth, or higher varieties of plants, in addition to mastering the regulation of fertilizer and water, chemical regulation methods can also be used to properly spray plant growth retardants during the period of establishment to control the growth of plants and shorten the length of plants. The base is internoded to reduce the plant height and prevent lodging.
Master the time of foliar spray. The optimum application period of foliar spray fertilizer is from wheat heading to grain filling stage. Foliar spray fertilizer advocates the use of potassium dihydrogen phosphate or urea solution, 0.5 to 1 kg per mu, and evenly sprayed 40 to 50 kg of water. At the same time, it is best to spray after 4 pm on a sunny day to avoid burning the leaves.

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