Preferred seeding method to improve quality At present, the main sowing methods of wheat are shallow cultivation, green cultivation and casing cultivation. Each of the three methods has its own advantages and disadvantages. In the production, it should be comprehensively considered according to the factors such as season, climate, soil, machinery and manpower, and choose the appropriate planting method to improve the planting quality and achieve the purpose of disaster reduction and production increase. 1. Shallow ploughing wheat: It is an ideal planting method, and it is also a typical planting method widely used in recent years. Its characteristics are conducive to mechanical operation, high seeding quality, early emergence and uniformity, and can overcome the shortage of seeding and nesting weeds, and the yield is high. The disadvantage is that it is restricted by climatic conditions, and the sowing season is like rain, which is easy to cause rotten rot. 2. Raw board wheat: The advantage is that the method is simple, easy to operate, low in cost, and high yield can be obtained when the technology is in place. However, due to the uncultivated soil, the grass damage is heavier; the soil is not in place when planting, the grain is bare, affecting the whole seedling; the seeding is shallow, the roots are distributed on the soil surface, and it is prone to lodging and premature aging. 3. Set of wheat: Before the rice is harvested, it is scattered in the paddy field, which can catch the season and make up for the shortcomings of the maturity of the former rice. The disadvantage is that the grass is heavy, the roots are shallow, and the later stage is easy to fall and prematurely decay. Moreover, it is greatly affected by the climate. If rice cannot be harvested in time, it is easy to produce thin and weak seedlings. Sowing at the right time, cultivating strong seedlings Timely sowing is the premise of two wheat to promote strong seedlings and fight for early development. Early sowing can make full use of winter warm and light resources, promote long-leaf tillering of wheat seedlings, which is conducive to the occurrence of low tillering and root growth, forming a strong seedling and a reasonable group before winter. According to the climatic characteristics of recent years, the suitable sowing date of wheat should be mastered from the beginning of November to November 20, and the seedling period should be controlled at the end of November; the barley should be planted before November 15 and the seedling period should be November 20-25. Strive to pre-schedule early, improve the emergence of seedlings, seedling rate, ensure early branching, winter and spring. Moderate sowing, optimizing groups Reducing the basic seedlings, establishing a reasonable starting point for the group, and increasing the rate of stem and ear formation are the core contents of the group quality cultivation theory, and also a key technology repeatedly emphasized in production in recent years. Within the suitable sowing date, the planting amount of wheat is 12.5 kg, the basic seedling is controlled at 18-20 million; the barley acre is 15 kg, and the basic seedling is 20-22 million. For the field where the amount of straw is large, the amount of seeding should be increased appropriately. Generally, the amount per acre is increased by about 1.5 kg. Seed treatment, cultivation of strong seedlings The whole amount of straw is returned to the field and the wheat field adopts the seeding sowing method. Before the sowing, the application of the allograft leaching (mixing) species can prevent the production of thin and high seedlings, promote the occurrence of low tillers, and cultivate the strong wintering. For wheat fields that are planted early or overgrown, spraying paclobutrazol in the 3-5 leaf stage of wheat can control the growth of the apex, and promote the growth of roots and low tillers, delay the growth process, and prevent freezing damage. It is also possible to use frozen soil suppression to prevent the length of the wheat seedlings and reduce the occurrence of frost damage. The best time for suppression is the 5-7 leaf stage in winter. Rational fertilization, main attacking weight Scientific and rational application of fertilizer can promote the promotion and control of wheat seedlings and regulate the growth of crop populations. Under the premise of suitable sowing and reasonable basic seedlings, the “Yangmai†series wheat varieties have a total nitrogen content of 16-18 kg per mu, and the N:P:K ratio is 1:0.4:0.4. It is advisable to adopt the principle of “two-headed, intermediate control†fertilization for nitrogen fertilizer operation. The first is to re-apply the base fertilizer. The amount of fertilizer applied in the early stage (basic seedling fertilizer) accounts for about 60% of the total nitrogen. After emergence, according to the seedling condition and the amount of base fertilizer applied, it is more conducive to expanding the source of the reservoir. To promote the coordinated development of the library source. Generally, the seedlings are strong and strong, and the field of the base fertilizer can be used with less or no fertilizer; the seedlings are thin and the base fertilizer is insufficiently applied, and the fertilizer is appropriately applied to promote the transformation of the seedlings. Second, the medium-term (jointing stage) is dominated by control to prevent the growth of ineffective tillers. For the fields with unbalanced growth, the seedling fertilizer (about 10% of the total fertilizer amount) can be appropriately applied to promote balanced growth. The third is the late panicle fertilizer, which provides sufficient nutrients for the main attacking big ear and foot granules. The general dosage accounts for about 30% of the total nitrogen used. The high-yield field, large-ear and large-grain varieties of panicle fertilizer should be applied in two times. The first time after the wheat jointing, the leaf color is obviously faded, and 10 kg of compound fertilizer is applied to strengthen the tiller to form ear and promote the differentiation of small flowers; after 7-10 days For the second time, 5-7.5 kg of urea per acre can reduce the degradation of small flowers and increase the weight gain. 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