Asparagus planting technique in greenhouse

Asparagus ununearthed white is called white asparagus, unearthed green asparagus is called green asparagus. It contains a variety of vitamins needed by the human body, and it is a very good home-cooked dish. Today, I will introduce the asparagus planting technology in the greenhouse.

First, deal with the seeds

Because the skin of asparagus seeds is thick and hard, it is difficult for water to penetrate the seed coat, so it is generally necessary to soak asparagus seeds in 25 ℃ warm water for 4 days before sowing. The germination temperature was controlled at 25-30 ℃. The common seedling raising methods in production are sunny border seedling raising, small arch shed seedling raising and open field seedling raising.

Second, establish a seedbed

First, according to the geographical location, build a certain length and width of the seedling bed, turn deeply, rake fine and flatten it, then spread it on the ground according to the amount of mature circle fertilizer 100kg and ternary compound fertilizer 1.5kg per 10m2, mix well, flatten and fill with water in the depth of 15cm, and sow seeds in ditches when the surface is white.

Third, sowing seeds

The sowing depth is 3cm. When sowing, the soil moisture in the border field should be ditched and watered twice. After the water seeps down, the asparagus seed should be sowed into a single seed. The sowing density is: row spacing 15~20cm, plant spacing 5cm, covering soil 2~3cm after sowing, pressing lightly on the second day, so that the seeds are closely connected with the soil to facilitate water absorption and soil moisture conservation. In order to prevent underground pests, poison bait can be put in the sowing ditch.

IV. Fertilizer and water management

The seedlings unearthed with high 10cm can be watered once. Generally, the amount of water per irrigation is 20 mm. In order to prevent root rot and blight, we should also pay attention to the water quality. Topdressing is carried out at the same time, generally applying compound fertilizer 50 kg per 667 square meters (1 mu), and the interval between topdressing is 1 month.

Even if the asparagus is produced in different regions, no matter which asparagus variety, as long as the sunlight will turn into green asparagus, buried in the soil or shaded by the sun, it will make the asparagus color white.