Sowing seeds in time can be planted from the end of August to the end of November, but seedlings are preferred for optimum planting in mid-November and high yields. The fruit should be picked up before sowing and it is best to soak germination before sowing. Generally soaked with warm water for 10 to 12 hours, and then for germination treatment, in order to facilitate the emergence of neat and tidy.
Although the soil is not strictly required for the close-grained planting, it is still necessary to make a fine soil preparation before sowing and to apply sufficient basal fertilizer. The amount of 0.75 kilograms per mu is measured by the live broadcast method and the cover soil is 0.5 to 1 cm. After emergence and time seedlings and seedlings, about 8000 mu seedlings. Too many shoots remain, plant stalks are weak, and there are no branches or branches in the lower part, and lodging is serious. This causes the plants to be opaque, impervious to air, promote their falling and fruit drop, affect the seed yield, and even cause the granules to fail.
Disease prevention and control The main disease of insect pests is blight, and in fields where the planting density is too high, downy mildew sometimes occurs during the later stages of plant growth. The occurrence of damping-off during the bolting period to the flowering period mainly caused the basal and middle parts of the stem to decay, resulting in the death of the whole plant. At the beginning of bolting, spray fungicide such as anti-dry spirit and enemy cough pine for 2 to 3 times, which can play a preventive role. The main pest is leafminer, because the insect body is small and the food is harmful to the embryo, causing the seed to lose its viability. Spraying an enemy insecticide such as omethoate at the flowering stage and the final flowering stage can prevent and control the insecticide.
The timely harvest of alfalfa seeds is harvested at the beginning of June. When the top 30% to 40% of the plants turn yellow, they can be harvested. At this time, during the rainy and hot season, it is critical to prevent rain and rain, and preparations must be made for prompt harvest. When harvesting, use fruit cuttings with clippings, and then spread on the tarps and other objects to dry. Because the seeds are easy to fall off, 60% to 70% of the seeds will fall off when they are dry. Generally about 100 kg per mu seed.
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