Asparagus should be processed before sowing. After putting the seeds in water, take out the seeds floating in sleep. The remaining seeds are cleaned and soaked for many times. Seed soaking is generally conducted in warm water of about 30 degrees Celsius, and the time for micro-gluing is generally 48 hours. During seed soaking, it needs to be replaced 1-2 times a day. After the seeds are fully imbibed, the seeds are taken out and discharged, put into a basin, and wet gauze is lifted in the basin. In the environment of 15-28 degrees Celsius, water is used twice a day during the process.
The suitable soil environment for asparagus is usually deep soil layer, fertile soil and low groundwater level. Choose soil and sand. In order to ensure the good growth and development of asparagus at seedling stage, the production of alkaline fertilizer is very important for seedbed production. Seedbed height is suitable for alkaline fertilizer. Usually, one mu of seedlings need 100 kinds of rusty organic fertilizer, 10kg of calcium phosphate, 10kg of potassium chloride, 10kg of lime and 10kg of urea. After mixing these alkaline fertilizer raw materials, it is suitable for soil and cultivation; After five to seven days, apply 30-40 kg of ternary compound fertilizer. The height of mixed fertilizer seedbed soil is 30 cm, the width is 65438 0.5 m, and the adjacent intergranular layer should be controlled at about 30 cm. In the process of seedling raising, it is guaranteed to be fragmented. Before sowing, spray 50% bacteria into the soil.
Asparagus should be planted at the right time. Asparagus should not be sown too late, otherwise it is easy to break the embryo. The suitable temperature for asparagus seeds to germinate is 25-30 degrees Celsius, and soil temperature is usually required for planting. If it exceeds 30 degrees Celsius, the germination rate of asparagus seeds will be affected. General selection of sowing from Gulu to mangshi. In the process of sowing, first of all, in the lawn mower, the depth of the four grooves used for sowing is generally 3-4 cm, and the seed spacing during sowing is usually controlled between 6-8 cm. After the seeds are planted, lower them with your feet to ensure that the seeds are buried in the soil. After sowing, the thin soil layer is on the surface of the seedbed and becomes thinner again. Then cover the seedlings with straw curtains or straws to ensure their humidity.
After asparagus seedlings are raised, the cover of the seedbed must be removed. If the temperature is too high, the corresponding shadow processing is needed. When the seedling is about 70 cm, topdressing should be done once every 20 ~ 30 days and 2 ~ 3 times. The fertilizer is 3-4kg/mu urea, 4kg/m potassium chloride or10kg/mu ternary compound fertilizer. If the weather is dry, you must water it every 7- 10 days. If there is too much rain, please do a good job of drainage and wait for the seedlings to be ready. The transplantation of asparagus should first master the management of base fertilizer. Usually, 80- 100 balanced soil, 10kg urea, 30kg calcium phosphate and 10kg potassium chloride need to be applied, and a soil-fertilizer mixed layer with a thickness of 10- 15cm is formed after thorough mixing. Transplants usually take place from May to June. In order to ensure that asparagus is folded, it is easy to grow in groups in the range of 5- 10 cm when the seedlings are benign. In the process of planting, seedlings should be selected from 0.3 cm, and three seedlings with 7 or more underground storage roots are seedlings.
When asparagus harvesting begins, a force will be applied. Generally, it needs to be applied several times in the first four months of bud picking. At first, it was combined with aluminum dichloride, and later it was carried by irrigation. The essence of vegetable and bamboo fertilizer is carried out through holes or strips. During asparagus harvesting, tender stems should soften seedlings in the first half of harvesting. After harvesting, the valve stem retired, which promoted the next round of planting and harvesting.
The symptoms are mainly stems, branches and leaves, which leads to the death of mysterious fruit and the yellowing and shedding of annual rings. Purple-brown spots were put forward at the early stage of onset. With the gradual expansion of spots, the center of Lexin turns to light brown, then to gray, edge and purple-brown edge. The prototype on most stems is enlarged to form an ellipse. Prevention and treatment methods are the same as stem prevention and treatment.
The symptom is that there are wet brown spots on the primary stem 30 cm from the ground, and then they turn into grayish brown light blue, and extend to the prism at the same time, or more prototypes can be connected to the strip. Lesin's edge is red, the middle is slightly concave, and the bag adjacent to it is black. Because the spots spread rapidly, the branches were easily broken or inverted, and the inside of the stem was dark and rough, so it died.
Prevention and control: the drainage system is good in high-lying places. Clean the pastoral poems, remove the stems and scatter them on the ground, and bury them or bury them in the ground. The shooting date should not be too long, and the rainy season should be handled in time to prevent the stem from falling off. Implement formula fertilization and apply more organic fertilizer and potassium fertilizer.