Green asparagus, also known as “Shijiebaiâ€, is a “green vegetable†in the international market. It has high nutritional value and anti-cancer and anti-aging medicinal value. Its market prospect is broad and it is profitable for many growers. Planting varieties, however, there are still many growers who do not understand the cultivation techniques of green asparagus. In order to avoid planting losses caused by the lack of cultivation techniques of whole and green asparagus, Xiaobian will talk to you about the cultivation techniques of whole green asparagus.
1. Sowing and seedling
Selection of good varieties
The quality of seeds is the key to the success of green asparagus cultivation. At present, most of the seeds that are promoted and planted in Ganyu County are imported from the United States: Glies, champions, etc.;
Seed treatment
1. First, soak the seeds, the temperature of the selected water is between 70~80 °C, stir while pouring water until the water temperature drops to room temperature, then add 0.1% potassium permanganate or carbendazim, soak for 40h. , complete the soaking work.
2. Then filter out the water, moisturize, and germination at 25~30 °C for 24h, waiting for the seeds to appear white, when more than 40% of the seeds are white, they can be sown;
3. Use nutrient 钵 to hold seedlings. The ratio of soil to feces in the nutrient soil is 3:1, add carbendazim, the temperature is controlled at 20~25°C, when the seedling grows to 10cm, use 0.2% KH2PO4 [phosphoric acid Potassium hydrogen fertilization is applied to the foliage. When the seedling age is 50~60d, if the ground stem reaches 3~4, it can be colonized.
2, colonization
Plot selection
The soil layer should be selected to be deep, the depth of the plough layer should reach 30~40cm, the soil is fertile, the pH value is between 5.5 and 8.0, the green asparagus is cultivated in sandy loam or loam with good permeability, and the dry energy can be poured and the raft can be discharged. The seedlings should be graded before planting, and the seedlings are divided into large seedlings, medium seedlings and seedlings according to the number of fleshy roots. Be careful not to cut roots during the seedling process. Seedling and planting should be completed on the same day, which is conducive to seedling grading and field management;
Colonization time
For the selection of colonization time, generally from May 20th to June 1st, the line spacing is kept at 120cm and the plant spacing is kept at 30cm. In the process of planting, the direction of the scales should be kept in the direction of the ditch, and the roots should be evenly attached to the soil. At the same time, the ditch should not be filled once, and the soil should be covered first, then fertilization and weeding should be carried out. The colonization depth is controlled at 15cm, which can ensure the survival rate of the seedlings is higher;
Classification
When planting, the seedlings are graded, planted separately according to the size of the seedlings, transplanted with soil, standard: seedling height 30cm, there are more than 3 aboveground stems, 10~15 fleshy roots, unqualified can not be planted, seedling bulbs when planting It is 10~15cm below the surface of the planting ditch, 4~5cm after planting, and then watered. Later, with the growth of the seedlings, the soil will be gradually filled and settled.
3. Daejeon management
The first year of Daejeon management is mainly divided into three parts, watering, seedling and topdressing. Generally, water is poured once every 7~10d, and the seedlings are replenished once a month. The seedlings are usually best at 16:00-17:00. After 1 month of planting, topdressing is required. Topdressing should be combined with cultivating loose soil and CO (NH2) 25kg/667m2. After 2 months of planting, combined with 100.0/667m2 of compound fertilizer.
In the second year of Daejeon management, the main work is clearing garden and field management, timely weeding, watering and fertilizing, while at the same time, we must carry out thinning and finishing, retaining strong branches.
In the third year, the management of Daejeon mainly increased the use of bamboo shoots and grading.
Before the bamboo shoots are collected, generally before and after the beginning of April, the fertilizer is applied to the ditch, and the compound fertilizer is generally applied at 25kg/667m2. The bamboo shoots are generally harvested on May 1st. The harvesting time is best controlled at 7:00-10:00. Pay attention to sun protection during harvesting. During the bamboo shoots, water should be poured once a week, and CO(NH2)2 should be applied once every 2 weeks.
4, pest control
Disease
The main diseases are stem blight and brown spot disease. The prevention and treatment methods are mainly agricultural control. The winter and spring are thoroughly cleaned up, the organic fertilizer and potash are applied, the water in the field is cleared in time, the humidity in the field is lowered, and the disease conditions are controlled. For the prevention and treatment of pesticides, spray 75% of chlorothalonil 600 times or use stems such as Boer liquid to control stems.
Pest
There are mainly beet armyworm, ground tiger, cockroach, golden worm, cockroach and so on. It is necessary to clean up the garden field, eradicate weeds, use unfertilized farmyard manure, and find pests. It can be treated with high-efficiency and low-toxic insecticides such as pyrethroids or 1000 times of phoxim.
5. Management after harvesting
After the harvest is completed in early July, it is necessary to excavate 15~20cm ditch between 2 rows, apply 25kg of three-element compound fertilizer per 667m2, and apply the decomposed organic fertilizer, pay attention to timely weeding, and pour antifreeze water before freezing. Reach the purpose of root protection.
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