Asparagus is a large number of Liliaceae plants. Asparagus is native to the eastern Mediterranean coast and Asia. It is heat-resistant and has a very cold growth period. The suitable temperature for seed germination is 25℃. Young stems are degraded into scales by asparagus leaves at 15 17℃, then branched into needles, and the leaves are replaced with low steam and dry air. Roots are fleshy roots, widely distributed, with fibrous roots, but without root hairs. They absorb and wet soil and soil, but they have strong static resistance, strong-resistance, and are not resistant to strong acid soil. The pH value is 6-6.7, but it may prevent crystallization. Besides, there is enough sunshine.

Asparagus can reproduce, reproduce and transfer seedlings with seeds. Seeding can be started when the soil temperature reaches above 65438 00℃. Before sowing, it should be soaked in water at 50-55℃ for 2-3 days, and then discharged into the seedbed. After sowing for 2 cm, the grass is wet and uncovered in time. Three plants will be planted.

Asparagus is isolated in order to be cultivated in sandy land or polished soil with deep altitude, high terrain, good drainage and loose soil, so that it can follow the crops in front of patients. The whole place needs deep ploughing, applying a lot of organic fertilizer and phosphate fertilizer, staying away from the soil, being highly sensitive and shallow, and dividing seedlings from 30 cm. After planting, thin fat is needed to accelerate the growth of the strain. When autumn comes, the fertilizer should be repaired once in autumn to promote the growth in the next autumn. Asparagus likes organic fertilizer and uses it every 15 days to exercise quickly. Phosphorus fertilizer, especially potassium fertilizer, is also needed to improve plant disease resistance and yield.

During the growth of asparagus, there are many pests. Asparagus pests include Spodoptera litura, Helicoverpa armigera, aphids, aphids and so on. Diseases include stem rot, brown spot, root rot, strain disease and bacterial Sclerotinia sclerotiorum. Suitable for pesticides, containing 0.5% wool green solution and 65% zinc Eupatorium 1000 times solution spray.

The time of planting asparagus is different, some are transplanted around spring, and a small amount can be harvested. Some people transplant before winter 10, turn green the next spring, and harvest in autumn. There are other times to transplant, choose the right time.

According to its planting time and seedling promotion time, spring transplanting needs to be carried out indoors with plenty of sunshine, and it is usually planted in the middle of 5438+ 10. In the past eight months, pay attention to the rain.

It is necessary to soak asparagus seeds locally to accelerate germination before sowing. Firstly, sterilizing, and soaking in 500 times solution of 50% carbendazim powder for 12 hours to prevent sowing date and rhizome diseases; Then soak in warm water at 25-30℃ for 24 hours, during which the seeds are 1-2 times at last. Wrap the soaked seeds under a wet cloth and place them below 25-28℃ (indoor sun green or other suitable places) for germination. 10% of the seeds can be sown lightly.