About cultivation techniques of heterophylla
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1. Nursery
1.1 Selection of heterophylla susceptibility mosaic virus disease, after the onset of the impact on yield is very large. Therefore, it is best to use the new anti-virus No. 1 heterophylla variety that is highly resistant to mosaic virus cultivated in Wendeng City.
1.2 Select soil to choose soil fertility is better, and there are water-conditioned conditions of sandy loam cultivation of heterophylla. The clay and the stagnant water, as well as the land where the former crop is tobacco, should not be cultivated.
1.3 Fertilizer Before tilling, spread 5-6 cubic meters of high-quality soil miscellaneous fertilizer, 50kg of ammonium bicarbonate, and 50kg of compound fertilizer of nitrogen, phosphorus and potassium.
1.4 To be used in Taiwan, the plot will be ploughed to a depth of 20cm after fertilization. After the flattening, the raft shall be smashed, and the raft shall be spaced 180-200cm apart. The raft shall be 10-15cm in height and 130-140cm in width, and the raft shall be leveled. can.
1.5 Seeding From October 20 to November 20, the seeds were evenly spread on the surface of the planter, and the soil was covered with a thickness of 1 cm. It is also possible to open a wide groove in the sampan surface with a 5-10cm line spacing and a depth of 1cm. Spread the seeds evenly into the ditch, and then cover them evenly. The amount of seed used for drilling and spreading is 2.5 kg. After sowing, cover the 8-10cm thick wheat straw and cover it with a nylon net to prevent the wheat straw from being blown away by the wind. The main role of cover grass is to keep warm, moisturize and prevent soil compaction. Some wheat straw was removed in early March of the following year, but a small amount of wheat straw was still needed (it was enough to cover the surface of the wheat straw), and the field management was the same as that of the product.
2. Commercial cultivation
2.1 Seedlings prepared by seedlings Seedlings (roots) prepared from commercial ginseng have two sources. One is nursery field, and the other is Honda (only 2-3 generations of continuous breeding, or virus disease may increase). The source of these two types of seedlings is about 1 mu of planted area of ​​about 10 mu. From September 20th to October 20th, the parsley will be planted and plants will be planted after the sick and weak roots are planted.
2.2 Soil preparation Fertilization method is the same as that of nursery field.
2.3 Implantation From September 20 to October 20, shallow grooves of 3-4 cm deep were opened on the rachis by 15-20 cm spacing. Connect the head and tail of the seedlings (roots) flat into the ditch, put 1 seedling in the large seedlings, put 2 seedlings in the middle seedlings, and put 3-4 seedlings in the seedlings. Afterwards, the sorghum surface is overlaid (without seedling emergence in that year). It can also be broadcast by spreading the seedlings evenly on the surface of the seedlings, covering the soil with another mulch from 3 to 4 cm and covering the mulch or wheat straw.
3. Field management Taizishen usually emerges around March 10 and enters flowering on April 5. Therefore, the mulch film should be removed in time at the end of February and early March to facilitate the emergence of seedlings. In order to create a cool condition for Taizi ginseng and promote its growth, corn should be used in the Taizi Sen. In early May, one row of corn is planted on the sunny side of each side (southwest side of the east and west side, south side of the north and south sides of the north and south sides), and 2 corns are planted every 20cm. Generally, about 500kg of corn is produced per mu.
The main diseases of heterophylla are black spot, leafy mildew and viral disease. It can be used to control 50% mancozeb 500 times, antiviral 500 times and virus A. Virus disease found in the central strain should be promptly removed. Insect pests are mainly underground pests, and 1 to 1.5 kg of Phosphorus should be applied during the colonization.
4. Harvest When there are more than half of the leaves in the field, it can be planed. Before the plan, the seeds will be swept up, and generally 5-10kg of seeds will be produced per mu. After the seeds are harvested, they should be mixed with wet sand and stored in a cool place. The commodity fresh parsley should be promptly dried after harvesting. When it is half-dried, remove the hair roots and continue drying to dry for sale. Leave farming at this time not planing, such as planting with the plan with the species, the effect is better.