Bellflower: Soil preparation, sowing, nursery, transplanting
First, the election site preparation
Choose sandy lands with plenty of sunlight, deep soil, and well-drained water. After the land is selected, apply 3000 kg of soil-fertilizer or loop fertilizer per mu, add 50 kg of superphosphate and 50 kg of cake fertilizer or 15 kg of diammonium phosphate to the ground, spread it into the ground, deep-plow the soil 35 cm, make a leveling and squeegee, and make a width of 1m. It depends on the terrain.
Second, breeding methods
(a) The use of seed propagation: the growth period of 2 years.
Production usually uses live broadcasts. The seed of Platycodon grandiflorum is small, the weight of one thousand grains is 1.5g, and the germination rate is 85%. Under the condition that the temperature is 18 to 25°C and the humidity is sufficient, the seedlings emerge after 10 to 15 days after sowing.
Winter sowing: Winter sowing in November - January. Smearing is generally used. When sowing, mix the seeds with fine sandy soil (the ratio is 1 pot soil mixed with 0.3kg seeds) and sprinkle it on the ravioli, and swipe it again with a broom to avoid seeing the seeds as a degree and make a slight shock. In the spring of the following year, emerged early.
(B) transplanting seedlings: growth period of 1 year.
1. Seedling raising: Platycodon grandiflorum seedling transplanting is generally available from April to June. It is too early to affect the quality of seedlings because of the small seedlings of Platycodon grandiflorum. The impact of seedling transplanting is too late, and the average seedling volume per mu is 10 to 12 kg. Specific methods: Choose land can not be in the high slope can not be in low-lying fields, it is best to select a well-drained field, the land to intensive cultivation, full base fertilizer, it is best to deep over a foot and a half above, the whole face, to facilitate Spray water for irrigation during drought, and spread the seeds of Platycodon grandiflorum well mixed with fine soil. Lightly pressurize it to cover the weeds and keep the soil moist. Generally, the seedlings can emerge in 10 to 12 days. After the seedlings emerge, select the rainy days to remove them. Cover for seedling growth.
2, transplanting: growth period of 1 year. From the autumn and winter of the year to the spring of the next year, budding was carried out. One-year-old straight platycodon grandiflorum seedlings were selected and planted in large and small gradings. When planting, in the entire good planting ground, the ditch with depth of 25cm will be opened at a spacing of 20cm, and then the bulbs will be inserted into the ditch at an angle of 75 degrees. According to the spacing of the plants, 6~8cm, the soil cover will be compacted, and the cover soil should be slightly higher than the seedlings of 3cm. degree.
Corn, also known as wheat, maize, grain, it is one of the world's three major food crops, planting area and yield after rice and wheat, ranked third.More because of good mouth, high heat, large yield, and is widely used in a variety of livestock feed, thus known as the "King of Feed", in addition, corn is also the three food crops most suitable for industrial raw material crops, its processing of industrial products as high as more than 3000 kinds.
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