Current Asparagus Variety Updates Need Attention
At present, it is the time when the asparagus variety is updated and there are several outstanding problems in updating the variety. It must be noted that:
First, the choice of land asparagus cultivation, must choose high-lying, can drain energy, organic matter content of sand, sand soil, such soil loose, fertile, conducive to root development, easy management and harvest; slightly sticky soil Need to increase the amount of organic fertilizer applied, and can only grow green asparagus, not suitable for planting white asparagus. Do not choose paddy fields and plots that are prone to stagnation, and high groundwater level, waterlogged plots are detrimental to the growth of deep-rooted asparagus, and they are frequently diseased and difficult to manage. In addition, the land where asparagus has been planted should be avoided as much as possible. Because there are many fungi in the soil, the lower jaw is susceptible to stem blight. Former crops are orchards, mulberry gardens, and onion crops, which are also avoided as much as possible. This type of soil can easily cause root rot in asparagus. If the old shoot area needs to be planted in situ, the soil must be disinfected before it is transplanted. Before transplanting, soil is disinfected with 10 kg of Stannin plus 3 kg of carbendazim per acre and then planted again.
Second, the selection of varieties New varieties of hybrids used in recent years, compared with the previous conventional old varieties, the difference is very large, one of the hybrid varieties is fast growth, can be harvested one year in advance, and the second is to increase the level of output and quality More than 40%, the third is more than 60% increase in disease resistance. Therefore, new hybrids must be selected. At present, hybrids that perform better in various provinces and regions in China are domestically produced: New Prince F1, 2000-3F1, Champion F1, Shoufeng Fl, etc. The imported hybrids are: Apollo F1, Grande F1, Jersey F1, (all male species) and so on. It should be noted that foreign-imported hybrids are inferior to domestic hybrids in disease resistance; in addition, there are many imported hybrids and fake seeds, and farmers must be careful when purchasing seed.
Third, the summer high temperature period Seedling technology Summer nursery, there are several issues to pay special attention: 1. Soak the seeds with well water for 2 days, change the water twice a day. 2. Clean the towels and soak the seeds, put indoor germination, rinse the towel seeds once a day, about 5-6 days, there is 10% of the dew, you can sow. 3. The area of ​​the seedbed should be as large as possible, and be irrigated with large water. The water can be sowed after the water is soaked. The on-demand rows and the spacing between the rows are 10 cm square and cover 3 cm fine soil. 4. High temperature in summer, conditional seedbeds can be shaded by shade nets, without shading nets, it can also spread 3-5 cm of green grass to shade; if the seedbed is dehydrated, it can be sprinkled onto the grass to ensure soil moisture in the soil. Do not let the seeds dry out. When the seeds germinate and germinate at about 10 after sowing, they are removed in the evening. 5. After the seedlings have been unearthed for 30 days, weeds are removed from the seedbeds. 0.5 kg of urea is spread per 10 m2, and water is applied after dressing. At this time, during the rainy season, carbendazim must be sprayed 400 times to prevent stem blight.
Fourth, the seedling management summer asparagus seedlings grow rapidly, pay attention to the drainage of seedbeds, remove weeds in a timely manner to prevent the occurrence of stem blight. After the seedlings have grown for 60 days, they can be transplanted. If the plants are not transplanted in the autumn, the transplanted bamboo shoots in the spring of next year will grow to a height of 40 centimeters. They may fall flat. This can be used to cut off the stems from the ground and then spread 0.5 kg of urea and 1 kg of compound fertilizer per 10 square meters. Watering the topdressing to fully dissolve the fertilizer. Every 7 days in the rainy season, spraying shoots of carbendazim 400 times solution against shoot blight. To ensure that the seedlings safely pass through the winter, the wintering water is poured over the seedbed before freezing, and then a layer of farmyard manure or hay is spread to ensure that the seedlings safely pass through the winter, and they can be transplanted in early spring.
5. Preparations for Daejeon After many years of experimental observation, the method of digging and planting ditch and planting asparagus is not very scientific, and it is the most scientific method that Daejeon generally plows it again. 5 to 6 mu per mu high-quality organic fertilizer and 50 kg of nitrogen, phosphorus and potassium (45%) compound fertilizer were spread on the ground surface, and then a deep plow was pulled by chain tractor to deepen 0.45 meters to make raw soil, Ripe soil, organic fertilizer and chemical fertilizer are mixed thoroughly. In this way, asparagus can not only produce high yields early, but also produce high and stable yields at a later stage. Because 85% of asparagus roots grow within 15-45cm of soil below ground level. Since the depth of arable land is normally 20-25 cm, 60%-70% of the asparagus roots will grow in 20 cm below the soil layer (plate soil), and the roots of asparagus will be inclined about 5-10 degrees downwards. Outward growth of 1-1.5 meters, so only digging 50 cm wide planting ditch, far from meeting the requirements of asparagus root growth, but also failed to achieve the purpose of high-yield in the later period. Some people do not even dig trenches, and their output can be imagined.
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