1. Sowing too late. The planting season of winter wheat is generally concentrated in September and October. The best time to sow wheat in Hubei is when the chrysanthemum is open, that is, half a month in the middle of the combination of cold dew and frost, and other regions are determined according to production habits. If sowing is too early, the wheat will grow vigorously. If it grows too much before dormancy in winter, it is easy to premature aging and suffer from freezing damage. If sowing is too late, the accumulated temperature before the winter break cannot reach, and there are few tillers or no division of sins. Planting too late is usually caused by excessive rain and missed planting time. 2. Sowing too deep. Too shallow seeding is not conducive to rooting and moisture preservation; too deep is not conducive to rooting, and there will be fewer tillers or no division of sins. Generally, the planting depth is 3-4 cm, 5-7 cm tiller is late and small, and there is basically no tiller above 10 cm. 3. High density. Both wheat and rice belong to the Gramineae family, and both have the nature of dividing sins. The rice growing season has high temperature and sufficient moisture, and generally has fast and more tillers. Therefore, in production practice, rice needs much less seeds than wheat for direct seeding or transplanting. Wheat needs to be planted reasonably densely, otherwise the yield is lower. The seeds are generally 20-30 kg/ About acres (667m2), except for interplanting land. The density is too high, the ventilation is poor, the line is closed prematurely, there is no free tillering space, and there are few tillers or no sin. 4. The soil lacks moisture. In the fast tillering stage, the soil water holding capacity is 60%-80%, the water is insufficient, or even drought, the root system cannot be pierced, the growth is slow or stagnant, and the tillering is few or not divided. 5. Soil compaction. Generally, there are three types: one is long-term use of low-quality fertilizers, the soil is acidified and compacted; the other is sandy soil, no plowing habits, long-term soil compaction; the other is too much rain when planting, rushing to prepare the land for the season, and there are many soil blocks Because the large pieces of dead mud have not reached the degree of looseness, the moisture loss is too fast or too much, the root system cannot be pierced, and the tiller is reduced or no tiller. 6. Insufficient nutrients. After the three-leaf period of wheat, the seeds are exhausted and the nutrients are provided by the soil. Fertilization is unbalanced, tillers are blocked, nitrogen and phosphorus deficiency are more prominent, and there are few or no tillers. 7. Saline-alkali land. Saline-alkali land generally has the five characteristics of drought, waterlogging, saline-alkali, thin (poor fertility), and slab. It grows slowly and is prone to have fewer tillers or no division of sins. 5. What are the factors affecting wheat tillering? 1. Varieties: The varieties with strong winter sex have a long vernalization stage and more tillers; varieties with strong spring sex have fewer tillers. 2. Accumulated temperature: From emergence of seedling to before overwintering, each leaf born requires an accumulated temperature of 70-80°C. To ensure the formation of strong seedlings before winter (calculated based on 6 leaves and 1 heart), the accumulated temperature above 0°C is 490～565°C. Late sowing wheat has insufficient accumulated temperature, fewer leaves, and fewer tillers. 3. Soil fertility and water and fertilizer conditions: high soil fertility, rich nitrogen and phosphorus, and soil moisture content of 70% to 80% are good for tillering. The nutrient area of ​​a single plant is reasonable, and the fertilizer is sufficient, especially the combined application of nitrogen and phosphorus, which can promote the occurrence of tillers and facilitate the formation of strong seedlings. In production, water and fertilizer are often the main limiting factor for the number of tillers, and the purpose of promoting and controlling tillers can often be achieved by adjusting water and fertilizer. 4. Seeding density and depth: Winter wheat should be sown sparsely, and the seeding depth is 3 to 5 cm. Sow too densely, the plants are crowded, win glory and grow, and there are few tillers. If the seeding depth exceeds 5 cm, the tiller will be suppressed; if the seedling depth is more than 7 cm, the seedling will be weak, and it will be difficult to tiller or tiller is late. From this point of view, the mechanism of winter wheat with fewer tillers or no division of sins is complicated, so the reason cannot be found only from the fertilizer. It is necessary to scientifically analyze the above factors and make a comprehensive judgment on the spot combined with the field. Disclaimer: Some articles on this website are transferred from the Internet. If the legal rights of a third party are involved, please inform this website for processing. phone
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