The Seedling-raising technique of Chuanshanlong Seeds

The propagation methods of Chuanshanlong include seed propagation, seedling transplanting and rhizome segment propagation. The propagation speed of rhizome is fast and the finished product is early, but the amount of planting per unit area is large and the propagation coefficient is low. The most important feature of seed propagation is its high reproduction coefficient, which is conducive to the rapid expansion of the area and the formation of large-scale production. 30,000 seedlings are produced per 500 grams of seeds, and there is no need to set up a frame in the year of seedling rearing. The length of the main rhizome is 10 cm, the diameter is 1 cm, and the length of the lateral rhizome is 3 color 5 cm. There are 8 overwintering buds and 5 growing points of rhizome, which is easy to form huge root groups. The specific techniques of seed breeding are introduced below.

The main results are as follows: 1. Seed collection treatment is from the end of September to the first ten days of October. The ear on the plant is collected and placed in a ventilated place with a thickness of not more than 10 cm. Water once a day, turn it once at noon, stick to 10ml for 15 days, and the seeds will fall off. From late October to mid-November, the dried seeds were soaked in clean water for 30 hours and then dried. Mix the fine sand of 2 times the seed volume with the seed, stir fully, pack it in a breathable woven bag, and seal the bag mouth. Then choose a place with high overcast terrain and no stagnant water to place the seed bag flat on the surface, take soil from both sides of the bag and bury it all, covering the soil thickness of more than 10 cm. After the seed bag and soil cover are frozen, it is covered with 30 cm thick straw to prolong the freezing time. Remove the covered straw 10 days before sowing.

2. The sandy loam with higher topography and slope of more than 5 degrees should be selected for soil preparation and seedling cultivation. 2000 kg of rotten farm manure or 15 kg of compound fertilizer shall be applied every 667m2 before land preparation. Then turn the soil 15 centimeters deep so that the fertilizer is evenly mixed into the soil. Make a bed with a width of 1.2 meters, a height of 10 centimeters and a length of not more than 30 centimeters along the slope, and the operating channel is 30 centimeters wide for weeding, watering and other management activities.

3. The sowing time is from May 15 to 30. Before sowing, mix seeds with dimethazone, 2.5 kilograms of seeds and 400 grams of dimethazone for every 667 square meters. Flatten the bed and spread it, sowing about 100 seeds per extended rice. Cover the seed with 1.5 centimeters of soil and suppress it with a wooden peg. Cover the bed with 1 cm thick larch leaves after sowing. Sprinkle a little sand on the larch leaves so as not to be blown away by the wind or torrential rain. Then water the sown bed once and for all. Check the moisture in the bed in time, keep the soil moisture in the seed layer, and water immediately after sunset when there is a shortage of water. The seedling can only emerge when the ground temperature is above 22 ℃. The first time it germinates a true leaf with a height of 1.5cm. After 12ml for 15 days, it germinates a bolting plant, and when the seedling reaches 15cm, it entangles other plants to grow. The height of the seedlings can reach about 1 meter in that year.

4. before and after the emergence of seedlings in the field management, when the weeds grow 2 true leaves, they should be pulled out in time, otherwise the weeds will easily bring out the seeds or seedlings if they are too large. In the later stage, if there are too many Monocotyledon weeds, Najiaojing can be used to weed. The rainy season is coming from late July to early August, the air humidity is high, the plant is easy to get leaf rot, wilting like water immersion. The method of prevention and control is to spray Daming green or strong harvest every 10 days after the first true leaf is spread, and spray it 3 times in a row. It was sprayed twice in late July. The main pests that harm the seedlings are red caterpillars and locusts, which are mostly damaged at night. They can be sprayed at 3: 00 pm with insecticides such as enemy killing.

5. The overwintering plants grew to wither after frost at the end of September and could not be transplanted before freezing. If it does not rain before freezing, frozen water must be poured to avoid the death of overwintering buds caused by soil drought caused by no snow in winter. After watering, the frozen surface of the bed soil was covered with 10 cm thick rice straw to ensure the humidity of the bed soil and delay the germination of the overwintering buds in the spring of the second year. The bare seedlings germinated in the middle of April and were frozen to death by late frost before May 20. Promoting its delayed germination is beneficial to transplanting in early spring and ensure the survival rate.