How to cultivate strong seedlings of wheat before winter

Only by cultivating strong seedlings before winter can we ensure large spike and multi-grain weight, high yield and bumper harvest of wheat in the coming year.

The criteria for strong seedlings of wheat before winter are as follows: there are 8 leaves on the main stem, 8 tillers per plant and 9 secondary roots before winter. the number of stems per mu in the general wheat field is 1.5 times of the number of spikes in the coming year, and that in the high-yield field is 1.5 times that in the high-yield field.

In order to achieve the above strong seedling standard before winter, we must pay attention to the following management measures: check seedlings as soon as possible, timely check seedlings and replenish seedlings in wheat fields with lack of seedlings and broken ridges. In order to reduce the gap between the wheat field of replanting and the large seedling of early sowing, the seed can be soaked for one day according to the proportion of 1 kg of seed and 1 kg of water before replanting, and the seed can be replanted after 1m / m for 2 hours; if the replanting is too late, the seed should be accelerated to sprout, so that the seedling can emerge 2 MUE 3 days earlier; if the time is too late, the wheat field that can not be replanted can be combined with inter-seedling and thinning seedlings for replanting. Transplanting to plant large seedlings, strong seedlings, planting depth without burying heart leaves is appropriate, after planting compaction, watering, covering soil; between seedlings, sparse seedlings can ensure that the seedlings are strong. Therefore, it is necessary to carry out inter-seedling and thinning seedlings as soon as possible for the "pimple seedlings" in the oversized wheat fields and general wheat fields. The combination of topdressing seedling fertilizer and winter fertilizer before winter plays an important role in promoting seedling strength, protecting wheat seedling safe overwintering and consolidating pre-year tillering. For dry and thin land wheat fields or general wheat fields with weak seedling potential, 1520kg of standard nitrogen fertilizer can be applied early in the three-leaf stage, 1520kg of standard nitrogen fertilizer can be applied in wheat fields with more fertilizer and stronger seedlings, winter fertilizer can be applied in combination with watering winter water between the Beginning of Winter and Lesser Snow, 1015kg of standard nitrogen fertilizer can be applied per mu, and 1520kg of ternary compound fertilizer of nitrogen, phosphorus and potassium can also be applied to plots lacking in phosphorus and potassium. You can also sprinkle 2000,000kg of soil and miscellaneous fertilizer in the wheat field, or 500,000kg of human feces and urine. However, snow-covered wheat fields and salt fields can not be irrigated; high-yield wheat fields, fertilizer, strong seedlings, tillering feet, generally do not need topdressing, in case the population growth is too prosperous and cause lodging in the later stage. Look at the wheat field moisture, timely watering the pre-winter water, mainly refers to the weak wheat field or low-lying land with tillers, when the soil water content is higher than 15% in winter, it can not be watered; if the soil moisture is dry and the water content is less than 15%, the wheat field should be watered in winter. The time of watering is 6 degrees per day, and the most suitable time is from the Beginning of Winter to Lesser Snow in half a month. Wheat should pay attention to paddling hoe, pressing, cultivating soil, preserving soil moisture and preventing cold before winter. Paddling hoe can increase the water content of soil plough layer, raise soil temperature, and promote the healthy growth of wheat seedlings. Paddling hoe should grasp the opportunity, that is, after watering or rain in the wheat field, when the soil topsoil is "white" or has "flower spots". To the flourishing wheat field, it is necessary to draw a deep hoe of 10Mel 12cm in order to inhibit tillers and prevent lodging. It is very good to press the wheat field twice before winter.

First, it can reduce water evaporation, and the cold wind can be prevented in the depths of winter.

Second, it can make the soil dense, strengthen the role of capillaries, improve the surface moisture of the soil, and take root organically.

Third, it can restrain the growth of excessively prosperous wheat fields. However, the wet and saline wheat fields should not be pressed, so as not to cause soil hardening or anti-salt (alkali). Pressure should be carried out after 10:00 and before 4pm on a sunny day. The function of cultivating soil in wheat field before winter is mainly to enhance the ability of drought and cold resistance of wheat, and to inhibit tiller, promote large tiller and prevent lodging by bacon. The method is to combine with ploughing and hoe to pick up the soil at the root of the wheat, but it is necessary to grasp the thickness of the soil so that the tillers are not buried.