Platycladus orientalis seed collection and nursery

Platycladus orientalis is one of the main tree species in afforestation in rocky mountain areas. The spring drought and low temperature in northern China, late spring, Arborvitae seedlings germinate late, the emergence rate is low, the quality of seedlings is poor, and can not be afforested in the same year. According to practical experience, autumn harvesting with cultivation can reduce the trouble of storing seeds, make full use of the autumn water source, ensure the water requirement for seedlings, and it is particularly beneficial to the cultivation of dry land in mountain areas. Timely seeding of Platycladus orientalis seeds generally matures in the middle or early September. When collecting seed, it is necessary to grasp the harvesting when the seed shell is yellow. After harvesting, dried and miscellaneous spare. The soaking germination is first soaked in warm water of 50°C-60°C for 24 hours, and then the empty seed floating on the water is removed, and then the good seeds submerged under the water are picked up and mixed with 3 times the wet sand in the outdoor. Dig a pit to the sunny side of the leeward (width 50 cm - 80 cm, depth 20 cm - 30 cm), the length depends on the number of seeds. Thinly spread the seeds of mixed sand on the bottom of the pit and cover it with a straw or plastic film. Turn it 3 times - 4 times a day. Sprinkle water regularly to keep it moist. When the seed has 1/3 split mouth, it can be sowed. After the soil preparation site is selected, apply the base fertilizer before planting, and plow the well to a depth of 25 cm to 30 cm, and then level it down. It is 1 meter wide and 30 centimeters wide. It is ready for broadcast. Sowing the seedlings in a well-distributed pot, with a spacing of 20 cm to 25 cm. Drain the bottom water in the trench. After the water seeps, spread the seeds evenly into the trench, then cover the soil 1 cm thick. Use 120 kg to 125 kg per hectare. After sowing, the noodles are covered with branches and leaves, wheat straw, etc. to facilitate the preservation of the earthworms. Generally about 7 days can be Qimiao, then gradually remove the cover can be. Bao Yu, such as autumn after the rain, soil drought, watering in time, the best watering before winter 1 - 2 times, to protect the antifreeze, but pay attention to watering should not be too late, so as to avoid frost thawing in the spring. In early spring, thawing in early spring must be timely soil protection, increase the temperature, and promote the growth of seedlings. The seedlings cultivated by this method have many branches and leaves, deep roots, strong seedlings, and strong drought resistance. They will not die due to spring drought. The height of seedlings can reach 30 cm to 40 cm in July and the number of seedlings per hectare is more than 50,000. The survival rate of afforestation in the rainy season can reach more than 95%.