Pinus tabulaeformis seedlings are also called field seedlings. Compared with container seedlings, their survival rate and preservation rate are low. However, if the appropriate method is used, the survival rate and conservation rate of afforestation are comparable to container seedlings, and the cost of afforestation is reduced by about 30% compared with container seedlings. 1. Tree species name Hi light pine, hi dry cool climate, ability to -25 °C low temperature, in the altitude of 500 ~ 2300 meters, the annual rainfall in the area of ​​300 ~ 750 mm can grow, is the shady slope half shady hillside afforestation pioneer species. 2. Appropriate habitats can grow on calcareous soils with acidic, neutral, and limestone development, and are pioneer species of arid and infertile slopes and semi-pyramid slopes. 3. Afforestation design Pinus tabulaeformis planting spacing is 1.5-22 meters, that is, 2500-3333 plants/ha, seedlings are 2 years old, diameter is 0.3-0.4 cm, height is 15 cm or more, main root length is 15 cm or more, and terminal buds It is advisable to be full and strong. 4. Afforestation technology measures (1) Site preparation time: A rainy season or edge preparation. Mode: Suitable land preparation methods include anti-slope fish scale pits, lower moon pits, fan-shaped caverns, and planting joints. Namely: In the steep slopes where the vegetation coverage is above 40% and the height is over 40 centimeters, it is better to use counter-slope fish scale pits and fan-shaped hole soil preparation sites; in the slopes where the vegetation coverage is over 40% and the height is not more than 40 cm, the slopes are suitable for use. Lower quarter moon pit or planting ground. (2) Afforestation can be carried out in spring and autumn. Spring planting is best when the buds are about to germinate. Autumn harvesting is carried out before the soil is frozen. In the autumn rain season, the planting effect is better. When the seedlings are raised, they must be bundled with soil, planted with bubbling water, soil, soil, and seedlings. The survival rate of 3 to 5 plants per hole is higher and the growth is more prosperous. When planting, plant plants on the wall as far as possible to ensure that the root system is stretched and buried to 3 cm above the original soil mark. It is best to use a suitable amount of seedbed soil for better results. (3) In the first three years after tending afforestation, it is necessary to insist on the second annual cut irrigation (grass) expansion. The timely replantation of the weak residual seedlings, dead seedlings, lack of seedlings. And to prevent damage to pests and mice. 5. Precautions (1) Pinus tabulaeformis should not survive in Yangshuo Liangshu afforestation. Even if it is alive, it is difficult to become a forest. (2) It is generally not suitable to plant Chinese pine trees on farmland and farmland. (3) The Pinus tabulaeformis mycorrhizal species is better planted on the original soil with seedbeds, and 3 to 5 planting clusters can significantly increase survival and promote growth. This is what ordinary people often say. "The truth. (4) Afforestation seedlings should be followed up, and the time from raising seedlings to afforestation can not exceed 3 days. When raising seedlings, the exposure time of seedling roots in the light and air can not exceed 12 hours, otherwise it will cause a large number of deaths of mycorrhizal fungi and reduce the survival rate of afforestation. Collagen is the most abundant protein in mammals, accounting for 25% to 30% of the total protein. It is widely present in all tissues from the body surface of lower vertebrates to mammalian bodies. Collagen monomers are long cylindrical proteins with a length of about 280 nm and a diameter of 1.4–1.5 nm. It consists of 3 polypeptide chains that are supercoiled around each other. Collagen,Collagen Peptides,Collagen costco,Collagen Peptide Products YT(Xi'an) Biochem Co., Ltd. , https://www.ytherblifes.com