Growing Environment:
The suitable growth temperature of asparagus is about 25 °c. the sandy loam with good drainage and ventilation is the best.
1000-seed weight of Asparagus was 20.30 g, 1800.3000 plants per mu, wide row and narrow plant, row width 1-1.2 m, plant spacing 0.2-0.35 m, seed amount 40-100 g per mu.
To Sow and raise seedlings:
Generally in 3-4 months of seedling vault, pre-seed germination 1-2 days, 15-25 degrees more suitable for asparagus germination.
Colonization:
General seedling age 60 days or so, plant height 30 cm, there are 2-3 main stem can be planted, seedling attention to root injury, filling to be solid, watering to thoroughly. After planting, pay attention to loose cultivation, soil weeding, timely topdressing, rope anti-lodging, the first year generally do not shoot. In the early April of the second year, the asparagus sprouted before the first 30 cm soil, in the shoot before, during and after a timely, topdressing.
Control of diseases, pests and weeds:
In the north, the harvest time is usually from April to June. In the south, the harvest time can be 2-3 times longer. After 30-40 days of shooting in spring, 2-3 mother shoots can be kept and shooting can continue for 2-3 months. If water and fertilizer management and pest control are good, the yield will be 300-500 kg in the second year and 1,000-2,000 kg in the third year, and the harvest will be sustainable for 5-8 years.
The main diseases of asparagus are stem blight and root rot. The stem blight was mainly caused by oval water blotch on the shoot. The diseased plant should be cut off and the mixture of Carbendazim and methyl taub was sprayed on the ground and on the plant. Root rot mainly affects the root system, and the aerial part is not obvious at the initial stage. When the root system is infected, it gradually dies, the aerial plant growth is weak, and some stems and branches turn yellow or die. Need to pre-disease, with 1:600 times of 50% carbendazim or 1:800 times of stem kuling irrigation root effective. The main pest is aphids, with high-efficiency and low-toxicity of the fast-kill D, kill aphids for prevention and control.