Asparagus promotes new cultivation techniques in the off-season

First, the cultivation of a robust asparagus roots generally planted and cultured need to use 1 to 3 years after planting the roots, and use early maturing, multi-stem green asparagus varieties. (a) to cultivate strong seedlings. There are two ways to grow strong seedlings. The first is the greenhouse nursery. At the beginning of January, seedbeds were planted in solar greenhouses. Special nutrients for 8 cm and 8 cm were used for the nutrient pods. One seed was sowed in the middle of each pod. After 3 months, seedling height was about 30 cm, and five small stems were produced on the pods. When the meat root reaches 10, it can be planted. The second is direct sowing of seedlings in Daejeon. In mid-March, in Daejeon, 60-80 cm spacing and 20 cm spacing were planted on the diggings. Each seed was sowed with 2 seeds. After sowing, the cover soil was 2 to 3 cm thick. After seeding, the seedlings should be punched and cooled in time to prevent hot sprouts. In late April, seedlings should be released as soon as possible to promote the rapid growth of seedlings. (b) transplanting seedling colonization. In late April, asparagus seedlings grown in greenhouses can be transplanted to the field. The row spacing and spacing are the same as those for direct seedlings in the field. The depth of the seedlings is 6-8 cm. (c) Field management. Field management focuses on four areas. One is weeding and weeding. In the early stage, more cultivating and less watering are needed to increase the temperature and promote the growth and development of asparagus. During the whole growth period, field weeds should be promptly removed so as not to affect the growth of asparagus. The second is to top-dress fertilizer in time and re-apply autumn fat. After entering late May, we must adhere to a small number of top dressing principles, supplement nitrogen fertilizer and potash fertilizer, and water in case of drought. Before and after the autumn, 50 kg of NPK fertilizer was applied per mu, and Qiu Shui was poured again. After the end of September, water and fertilizer should be controlled to avoid new stems and promote root storage. Third, graded soil and increased stem diameter. At the beginning of June, the soil is cultivated in the roots of the plant once, and the soil is 3 to 5 cm in height and 10 to 15 cm in width. The soil is applied for the second time in combination with Shi Qi and the fertilizer. The amount of soil is the same as the first time to promote the growth of scale buds in the underground stems. Promote cultivation yield. The fourth is rotation updates. In early November of each year, roots with robust, large scale buds, and large roots are excavated before being planted, placed in a cool, low-temperature place for preservation, and used for other crops in the asparagus field.

Second, the asparagus root plants of the false plant (a) leave soil treatment and implantation density. 500 kg of bio-organic fertilizer should be applied per acre before being planted and deep-turned by 30 cm to evenly mix the bio-organic fertilizer with the soil. Generally, 10,000 to 12,000 asparagus root strains can be planted per 333 square meters. From north to south, each row is 120 centimeters in width, with 8 rows of asparagus per juvenile. There are ridges between the urns, which are 40 centimeters wide and 15 centimeters high. They are used as a work line when harvesting bamboo shoots. (b) Root excavation and storage. After the autumn frost, the asparagus roots can be excavated when the asparagus stems are yellow, and must be excavated before freezing. When excavating roots, roots should not be damaged or roots should be damaged as much as possible, and roots should be kept 25 centimeters or more long. When excavating roots, start from one end of the asparagus plant, dig 30 cm deep, and then draw roots from the bottom. If you use mechanical digging, you should open a deep ditch at 25-30 cm on one side of the asparagus plant line. Then, asparagus shoots should be plowed at the bottom of the asparagus plant. Turn the roots out and shake off the soil from the roots for storage. During storage, the root strain should be placed at a temperature of 0°C to 5°C to promote its dormancy. It is advisable that the root strain be free from frost damage and dry, and store at least 15 days at low temperature. (c) Treatment of asparagus roots before prosthesis. At the beginning of the prosthesis, the roots were soaked with 3010-6 to 5010-6 gibberellic acid or evenly sprayed on the roots to break the dormancy and promote the sprouting of the scale buds. In order to prevent root rot in the conditions of high temperature and high humidity, 8% of the sodium sulphide mixture can be used to inject water from 150 to 200 times to disinfect the roots or soil. (d) Implantation procedures. Implantation should be completed by November 20th. First leave 40 centimeters at one end of the greenhouse, then exhume the 30-cm deep and 80-cm wide puppies. It is best to lay a layer of cow dung on the bottom, cover the soil with 1 cm thick, and then put the roots together. The rows are closely aligned, with the roots facing one side and slightly inclined, but the scale buds must face upwards and remain flat. When planting, use fine soil to fill gaps between roots in a timely manner. After each pod is planted, use a small amount of water to flush the fine soil into the root space, but avoid excessive amounts of water so as not to affect the ground temperature, which is not conducive to the emergence of bamboo shoots. Finally, cover the roots with 6-8 cm thick soil. Second excavation is to be carried out at a distance of 40 cm from the first point and the same method is used. After the planting, the shed should be immediately baited, and the management should be strengthened to promote the germination of the scale buds and shoot the bamboo shoots in time.

Third, after the management of the post-falsification management of asparagus after the prosthesis is focused on the reasonable regulation of temperature and humidity. Solar greenhouses should be equipped with dry and wet thermometers and soil thermometers, and be observed and documented in time. Measures should be taken according to the actual situation and strict management should be conducted. (a) Temperature regulation. Asparagus just entering the shed requires higher temperature conditions to break the dormancy of the root itself. Before taking the stems, the temperature in the shed during the day should not be lower than 25°C, and the soil temperature in the night should not be lower than 8°C. After the asparagus stalk grows out of the ground, when the temperature in the shed exceeds 25°C, it should be ventilated. In the afternoon, cover grass and sedge to keep warm, so that the night temperature is not lower than 8°C. On the sunny day, about 9:00 am, the haystacks should be uncovered, and about 4 pm, they should cover the grasshoppers in time to keep the temperature in the sheds from being dissipated. If cloudy or snowy days last for a long time, they should be warmed in the short term. (b) humidity control. Relative humidity in the shed is controlled at around 85%. When the topsoil is dry, it is watered, lightly poured is suitable, and sprinkler irrigation can be performed conditionally. (c) Asparagus harvesting. As soon as the asparagus shoots grow out of the ground, the weak and curved deformed stems should be removed in time to avoid the consumption of nutrients in the root and affect the yield. When the stem is 25-27 cm in length, it can be harvested. It is required that the tip of the stem does not have a loose head. The stem has no fiber, and the lower part retains about 1 cm of purple or white stem.

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