1, breeding
There are two kinds of breeding methods: one is seed propagation, and the other is propagation of ramets. Seed propagation can be broadcast in spring or autumn. Autumn sowing in early September to late October is appropriate, spring sowing from late March to late April is appropriate. Seed germination 15 days before sowing and soaking in 35-40°C water. Autumn sowing is better than spring sowing. The suitable temperature for seed germination is 18°C. Spring sowing is generally used 250-300 grams per mu, spacing 50 cm, spacing of 33 cm. It is also possible to transplant seedlings, transplant seedlings, apply base fertilizers, and apply water once after leveling. Sprinkle the seeds evenly after water infiltration (3-5 g per square meter of seed). Cover fine soil for 15-20 days. Emergence. When the seedlings are transplanted at a height of 10-18 centimeters, do not plant them too deeply. Do not injure the roots and water them after planting. Plant propagation can be performed from September to October or before plant germination in early spring. The method is: separate the mother plants naturally, and then grading them according to the growth period and the size of the roots, and cultivate them separately, with some fibrous roots, so as to shorten the period of the seedlings.
2, management
After the planting plant has returned to green or has been planted and lived, topdressing is applied once. Afterwards, in April, May, and October each year, loose soil, weeding, fertilizing, and soil cultivation are observed. In the rainy season, drain water in a timely manner to prevent the accumulation of stagnant water. If lack of seedlings in time to make up, to ensure production.
3, harvest
Pyrethrum can be harvested in the first year, and the amount of flowers collected will increase in 2-3 years. Generally, 80-150 kilograms of dried flowers will be produced per mu and 400 kilograms of hay will be produced. The flowering period is May to July in one year. To select a sunny day, wait until all the discs are open for harvesting. The content of this flower pyrethrum is the highest, and the collected flowers must be dried in time to prevent mildew.
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