First, the sowing period "The late broadcast is weak, the early broadcast is prosperous, and the wheat seedlings are planted at the right time." Wheat is planted late, due to low temperature, late emergence of seedlings, small plants before winter, less tillering, poor growth and development of roots, no strong seedlings, weakened cold resistance of wheat seedlings. At the same time, due to low tillering before winter, the tillering rate is low. The number of acres is small. Late broadcast is not good, so it is not good to plant too early. Because the early sowing of wheat seedlings grows rapidly under higher temperature conditions, the quality of seedlings is weak, not only vulnerable to pests and diseases, but also many tillers, large groups, easy to form Wang Miao, but Wang is not healthy, less dry matter accumulation, there are In the winter before the jointing, it is easy to suffer from freezing damage during the winter. Therefore, it is necessary to determine the sowing date reasonably according to the characteristics of the variety. Generally, the semi-winter varieties such as short anti-58 should be planted on October 10-15, and the weak spring varieties should be planted on October 15-25. Second, the amount of broadcast During the suitable sowing period, the average half-winter variety of the plot is 7-9 kg per acre, and the weak spring variety is 9-11 kg per acre. If the sowing date is postponed, it is necessary to increase the amount of broadcast appropriately. Generally, it is broadcasted every day for one day, and the amount of broadcast is increased by 0.25-0.5 kg. Seeding should be carried out with a seeder , requiring accurate seeding, uniform seeding, and uniform depth to ensure seeding quality. Third, lyrics The species under the ankle is the key to ensuring the seedlings, the seedlings, and the seedlings. "The wheat harvest every year" is to emphasize the importance of the bottom. The astragalus is sowed or the mouth is not enough, the emergence of the seedlings is slow and not uniform, the tillers are delayed, the tillers are absent, and the seedlings are thin and weak. Therefore, it is necessary to do the next kind. Insufficient cockroaches should be poured into the bottom of the water, but also to ensure good mouth to ensure that the whole seedlings are broadcast. For plots with sticky soil, poor tillage, and difficult to protect the mouth, you can also plant the seeds first, then pour the head water. Fourth, the depth of the broadcast The suitable sowing depth of wheat varies with climatic conditions, soil quality, and lyric conditions. When the climate is dry , the soil is soft, and the sensation is insufficient, the sowing can be appropriately deeper. Generally, the sowing depth is 4-5 cm; the soil is sticky and the lyrical plot can be slightly shallower, generally 3 to 4 cm deep. It is appropriate. After the broadcast, pay attention to timely suppression, bridge the soil, and solidify the soil , so that the seeds and soil are closely combined, which is conducive to lifting the stalks, early emergence, and competition. Pour the land of the head water, so that the planting should be shallower. After the soil is dry, it should be drained in time to break the knot and facilitate the emergence of seedlings.
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