The bitter buckwheat is originally a wild plant in China. After years of domestication and breeding, it has become a popular high-yield, high-quality feed crop, and is an excellent juicy feed for various livestock and poultry. In North China, bitter buckwheat usually sown in April, twitching in July, flowering in August, the flowering period is very long, can be extended to October, 9-10 seeds mature gradually. 1. Soil preparation: Shepherd's buckwheat should not be used as a continuous crop. The former pod should be wheat or leguminous pasture and forage crops, and the latter should be arranged with crops such as beans, wheat, corn and potatoes. Seeds are small and the seedlings are weakly excavated. They require fine soil preparation. It is better to turn the ground in autumn, and the depth of cultivation should be more than 20 cm. 2. Fertilization: bitter leeks grow fast, harvest more times, and produce more, so they need more fertilizer. Before planting, sufficient base fertilizer should be applied, and 3,500 to 5,000 kilograms of organic fertilizer should be applied per acre, 10 to 15 kilograms of urea, and 15 to 20 kilograms of superphosphate. After each harvest, combined with irrigation, the human fecal urine or ammonium sulfate, urea and other chemical fertilizers are applied. 3. Seeding: seeds need to be cleaned before sowing, to clear immature seeds and impurities, select large and full-purple purple black seeds for seed use. Seeding for a day before sowing can increase the germination rate. In addition, the seed germination rate is highest in the second year of seed collection, and then declines rapidly. Therefore, the seeds harvested in the first year must be selected for seeding to ensure the whole seedlings. Bitter leek should be sown in the spring, preferably at the time when the ground is thawed, or it can be planted in wheat stubble where winter wheat is harvested. Can be broadcast, broadcast. The sowing amount per acre is 1 to 1.5 kilograms when broadcast; 0.5 to 1 kilograms are drilled and the spacing is 20 to 30 centimeters.
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