Due to its planting time, high survival rate and fast planting efficiency, asparagus can be harvested for ten years. It is one of the most efficient economic crops. It is rich in protein, has blood circulation and anti-cancer. Therefore, it is favored by consumers. In the high-yield cultivation of asparagus, the following points should be focused on.
First, cultivate strong seedlings
In order to cultivate strong seedlings, the first step is to select good varieties, and secondly to establish a nursery for seedlings. The best construction period for asparagus is June, and the seedlings take about three months. After the seedlings are raised, the seedlings should be planted at a distance of 16.5 cm×16.5 cm. It is most suitable to select 10-20 roots when transplanting seedlings.
Second, the land transplant
Since asparagus prefers tidal loam, it is necessary to remove impurities from the soil several times before transplanting. After fully drying, apply 40-5000kg or 100-150kg of cake fertilizer, 150kg of superphosphate, and potassium chloride per mu. 30kg, after the application of fertilizer, ploughing, for cake fertilizer, add water for 8-10 days and then mix superphosphate and potassium chloride, apply to the ditch (depth 30-40 cm) and cover the soil after planting.
Third, reasonable close planting
The planting period of asparagus group price is from August to September, and it can be harvested in the second and third months after sowing. The row spacing of planting seedlings is 25cm×160cm. When planting, the roots should be fixed in two halves and then fixed in the ditch. In the planting, the scale buds are oriented towards the midline of the sputum, and then cover the soil of 5-6 cm. After compaction, the root water is poured.
Fourth, strengthen water and fertilizer management
1. Seedling stage
The watering method of furrow irrigation is used to water the water every 20-25 days, and the drainage ditch should be opened to prevent rain and water accumulation. The first fertilization is carried out 20 days after the planting, and 5 kg of compound fertilizer per acre is applied to the 1000 kg hole or ditch application. After 40-60 days after planting, fertilize once every 25-30 days, and apply per acre. Compound fertilizer 25-50kg or urea 10-20kg + potassium chloride 6-12.5kg. Four months after the planting to the harvesting period, fertilize once every 25 days, 20 kg of urea per acre, 12.5 kg of potassium chloride, and watering after fertilization.
2. Harvest period
During the harvesting period, the fertilizer is applied every 15-20 days, and 20 kg of urea and 12.5 kg of potassium chloride are applied per mu. At the same time, the four sides and the Tianzhonggou are to be opened, which is conducive to watering on sunny days and preventing water from accumulating in rainy days.
Five, fixed mother stem
In the period from May to June after the colonization, the last batch of stems can be used as the fixed stem when the seedlings are harvested by 0.8-l cm. Before the fixed stems, 30 kg of urea should be applied per mu. And 15kg of potassium chloride, after the selection of the fixed stem, it is necessary to immediately carry out the large-scale cultivation of the soil, and pour into a box of 30-40CM.
6. Prevention of pests and diseases
1, common diseases of asparagus: stem blight, anthracnose; common pests: there are tigers and green worms.
2, stem blight prevention and control: 70% methyl thiophanate 600 times solution or 40% carbendazim 500 times solution spray, seedlings, seedling period every 10-15 days spray once, mother stem selection period 5-7 Spray once a day.
3, anthracnose prevention and treatment: 70% mancozeb 500 times solution, or 75% chlorothalonil WP 600 times solution, or 80% anthrax Fame WP 800 times solution spray, spray once every 10 days, even Spray 2-3 times, but it is strictly forbidden to spray for 7 days before collecting bamboo shoots.
4. Prevention and control of ground tiger larvae: When the larvae are 1-2 years old, they can be sprayed with 1000 times of Anlubao. The young larvae of the larvae and the ground tigers can be manually killed.
Seven, change seedlings
After harvesting the asparagus for three or four months, the previous seedlings will gradually age. At this time, the whole seedlings can be removed to leave the root potato. After that, the ridges are fertilized and the potatoes are seeded, and the seedlings are changed twice a year.
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