How to buy wheat seeds in autumn
Due to the great differences in the natural ecological climate and cultivated cultivation conditions in various wheat regions of China, the complex production levels are quite different. Based on years of scientific research and production practices, the main principles that should be followed in the selection of improved varieties of wheat are summarized here. (1) Adhere to the principle of selecting certified varieties. According to national and provincial regional trials, production test results selected varieties. To overcome the blind pursuit of new ideas, do not be affected by certain advertisements or one-sided propaganda, the introduction of untested varieties, so as not to cause undue losses to production. All varieties planted on a large area must pass the regional trial and production test and be approved by the National or Provincial Variety Approval Committee. National or provincial regional trials generally have test points distributed in different ecological areas. Tests have high representativeness and accuracy, and the identification of traits such as adaptability, resilience, yield, etc. is relatively objective and accurate, so that The varieties approved by the province can generally be widely used in their adaptation areas. (2) According to local natural and cultivation conditions, select varieties, so that thoroughbreds are on the way and good methods are available. Some people heard that a certain variety was good and planted blindly without asking questions about the nature and suitable range. As a result, all kinds of high-yield products could not meet the fertility of the fertilizer, the yield potential could not be fulfilled, or the spring variety was planted in early indica. In the autumn of warm winter and cold winter, there is a great deal of damage. In contrast, it is said that the variety is not good. When selecting good varieties, it is necessary to examine the comprehensive factors of natural cultivation, and the good varieties and good methods are pushed together. First, varieties are selected based on the characteristics of local climate ecology types. The types of climatic ecology vary across regions, and the requirements for varieties vary. For example, in winter wheat fields with clear, dry, abundant sunshine and short spike differentiation, it is generally better to use winter wheat varieties with good cold resistance and strong tillering ability. However, in the winter and wheat regions where there is more rain, higher temperatures, less sunshine, and a longer spike differentiation time, spring large ear varieties with strong moisture tolerance and long resting periods should be selected. In the Huang-Huai Dongmai District, which is located in the transitional zone between the northern and southern winter wheat areas, it is generally advisable to use mid-winter and mid-weak spring mid-type hybrids with medium tillering percentage, and three production factors. The second is to use varieties according to production conditions and levels. In order to use improved varieties, we must first consider the high yield, and the high yield of wheat varieties is closely related to the cultivation conditions. Therefore, when selecting varieties, we must first consider local production conditions and production levels. In areas with good water and fertilizer conditions and high production levels, high-yield products with high resistance to fertilizer and high yield potential should be selected; varieties with strong adaptability and high yield should be used in large-scale middle production areas; Mountain and sand alkali lands should use good varieties that have strong drought resistance and sturdy ability. The third is based on farming systems, crops and cornices use good varieties. The reform of farming systems often has new requirements for wheat varieties. For areas with higher multiple cropping index, early maturing varieties are generally required. In the intercropping system, compact and dwarf resistant varieties are required. Another example is the early sowing of wheat in Tengkuo in the Huanghuai wheat district. The use of semi-wintering varieties and the use of spring and spring varieties in the late spring. The fourth is to select improved varieties based on the characteristics of local natural disasters. Selection of varieties should pay attention to the analysis of the characteristics of pests and natural disasters in the region, and the large-scale popular varieties selected must have strong resistance to major local natural disasters (cold, dry, wet, dry and hot wind, sprouting, etc.) and pests and diseases. Achieve bumper harvest. (3) Selection of varieties must be comprehensively evaluated. The selection and promotion of varieties must be based on the results of district trials and production trials, but also dialectical and objective. It is not simply based on the level of production in the trials and the good or bad selection of the varieties; it is not only to resist disease, disease, and disease, but also to completely negate the need for unilateral immunization. To comprehensively measure the comprehensive traits and stable yield of the varieties. The good varieties promoted in large areas should have many advantages and few defects, especially comprehensive traits, rich genetic basis, good disease resistance and disease resistance to major diseases, resistance to major natural disasters, and high and stable yields. That is, the varieties welcomed by the masses are “Great increase in output in the harvest, small increase in production in the flat year, and no reduction in production in the disaster yearâ€. For some special varieties, special cultivation measures can be applied.