First, early management
1. Time and method of seedling raising: Generally, the seedlings of Yangshuo are used in the middle and the middle of March. If the heat preservation materials such as grasshoppers are covered, they can be advanced to the middle and late February; the greenhouses that are idle in the early spring can be used for early seedling raising, according to the bamboo shoots. Different, summer and autumn sowing can also be.
2, seed treatment: asparagus seed skin thick and hard, outside the wax is difficult to absorb water, soaking seeds must be germinated before sowing. The method is as follows: firstly use the cold water for seed leaching, drifting the immature cockroach species and the worm species, then soaking in the warm water of 30-40 ° C for 2-3 days, changing the water 1-2 times a day, after the seeds are fully absorbed The water is filtered and placed in a pot, and germinated at 20-25 °C. To prevent boring, wash it once a day with water. Seeds can be sown when about 10% of the seeds are germinated.
3. Sowing: Before the sowing, the surface of the glutinous rice will be poured into the bottom of the water. After the water has been infiltrated, the straight line will be laid at a distance of 10 cm, and the seeds of the buds will be spotted on the intersection, and then the soil will be evenly sieved. The sieve is on the surface of the crucible, and the cover soil is about 2 cm thick. Large area seedlings can be spread.
4, heat preservation and moisturizing: immediately after sowing, cover the plastic film. Keep the temperature below 5 cm for 25-30 °C during the day and 15-18 °C during the night. After the seedlings are released, the temperature inside the crucible exceeds 32 °C, and the film should be uncovered in time to refine the seedlings to enhance the adaptability to the external environment.
Second, post management
1. Selection of colonization: Asparagus is not strict with the requirements of pH. Any soil with a pH between 5.5 and 7.8 can be planted.
Preparation before planting: 1 Digging and planting the ditch on the ground that has been turned over and flattened, according to the north-south direction, straighten the line according to the line spacing, and dig the groove along the straight line. The groove width is 40 cm and the ditch depth is 40--50 cm. 2 Fertilization and filling of the ditch: fill the soil with mixed soil and soil. Make the ditch surface slightly lower than the original plane, flatten the ditch surface, and form the ridge surface into a middle high, small arch surface with two sides low, fine and flat.
2, seedlings planted: when the asparagus seedlings grow more than three stems on the ground can be transplanted and planted. When starting the seedlings, first take the bamboo shoots in the middle, cut them into squares with a shovel, and then take the clods out with the clods. According to the plant spacing of 25 cm, planted in the planting ditch, the seedling bulbs are 10-12 cm below the surface of the planting ditch. . Then the watering is naturally collapsed, and after the water has been infiltrated, the soil is kept in a timely manner.
3. Management after planting
1 After planting, it is necessary to water the water in a timely manner. If the aphid is found to be damaged, it is necessary to spray 1000 times of fruit juice in time for prevention and treatment. In order to accelerate the growth of bamboo shoots, 30-50 kg of compound fertilizer will be applied every 667 square meters from July to August. Pour a large water before and after the winter, and then properly cultivate the soil, generally 10-15 cm, to keep warm and protect the young bamboo shoots for safe wintering.
2 In the case of planting, the green bamboo shoots do not need to be ridged when harvested, so the density is larger than that of white bamboo shoots. The average row spacing is 1.2-1.3 meters and the plant spacing is 25 centimeters. The length of the green asparagus harvest period depends on the growth of the asparagus in the previous year. In the harvesting period, in order to meet the demand for nutrients in the tender stems, two quick-acting fertilizers can be applied. Generally, 30-50 kg of artificial-age shoots are applied. Because green asparagus does not need to be harvested, it is more sensitive to soil moisture than white bamboo shoots. Therefore, it is necessary to timely water the harvesting season to ensure that the tender stems are fast, long straight, and do not diverge. Pay attention to pest control during the period of picking bamboo shoots.
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