Through the use of container seedlings, ABT rooting powder, water retaining agent, mulching, immersing and other afforestation techniques, the survival rate of afforestation and seedling growth can be significantly increased. The survival rate of afforestation is generally more than 90%, and it is worth promoting. First, container nursery The cultivation of seedlings in containers filled with nutrient soil is called container seedlings. It is suitable for the cultivation of bare root seedlings in areas and tree species that are not easy to survive, and it is also suitable for the cultivation of rare tree species. Seedlings grown in this way are called container seedlings. Afforestation with container seedlings is an important means to improve the quality of afforestation. The first is not limited by the season of planting: container seedlings can be planted in all seasons; the second is to save seeds: 2-3 seeds per seedling are sown, and the seed utilization rate is high; third, the seedling growth period can be shortened: only 3-4 months. It can be cultivated in a shorter time or in a shorter time. Fourth, it is conducive to the cultivation of good quality seedlings: container seedlings are easily managed to meet the requirements of seedlings for humidity, temperature and light, and are conducive to cultivating strong seedlings. Fifth, they can improve the survival rate of plants: Containers Planting is full-rooted seedlings, roots are not damaged, and the survival rate of planting can be greatly improved. Sixth, it is beneficial to the early realization of benefits: The nutrition soil used in container nursery is high in fertility, which is conducive to the growth of seedlings. Second, ABT rooting powder ABT rooting powder series has the dual functions of supplementing exogenous hormones and promoting the synthesis of endogenous hormones in plants. It can promote the formation of adventitious roots, shorten the rooting time, and promote the formation of clusters of roots of undulating roots. At present, there are three models that are widely used in forestry production. No. 1 and No. 2 are mainly used to promote the induction and formation of adventitious roots in cuttings of precious and hard-to-root plants. Such as apple, hawthorn, citrus, ginkgo, longan, litchi, grape, pomegranate, black currants, pine cypress, paulownia, black locust and some valuable flowers, etc., per gram can handle 3000 to 6000 more than cuttings. No. 3 is used for transplanting seedlings, and it is used to treat the root system of seedlings, the survival rate of high seedlings that can be transplanted, promote root development, accelerate seedling growth, and increase resistance to stress. Each gram can handle 3000-6000 seedlings. Three, water retention agent The use of water-retaining agents for afforestation in arid regions can greatly increase the survival rate of afforestation. A water-retaining agent is a high-molecular polymer, which is insoluble in water, but can absorb water which is quite a hundred times its own weight. The absorbed water cannot be extruded by a simple physical method and has a strong water retention property. When afforestation, the water-retaining agent is applied at the same time with pesticides, fertilizers, etc. to make them release slowly, increase the utilization rate and reduce the pollution to the environment, thus reducing the cost of crops. The service life of forestry is generally more than 5 years and up to 7 years. The degradants are ammonia, carbon dioxide and water. Its main component is a polyacrylate (potassium salt or sodium) and polyacrylamide copolymer, a small reservoir that can quickly absorb, store and release water and nutrients to meet the growing needs of plants, while improving soil ventilation and increasing soil activity. Reduce soil consolidation. Fourth, plastic film coverage The operation method of mulch-covered drought-resistance afforestation technology is: after the seedlings are planted and watered, the trunk is taken as the center, and a funnel-type tree disk with a height of 1 meter, low and high circumference is trimmed, and a diameter of approximately 1.2 meters is sandwiched between the mulches. 10cm water inlet vent, set over seedling stem, tiled to the tree plate, the membrane surface should be tensioned and flattened, surrounded by soil compaction, around the seedlings and then sealed with bauxite, reducing the evaporation of water around the roots, is conducive to drought Security. After covering the plastic film, the surface soil temperature is improved, the physical and chemical properties of the soil and the micro-environmental state are improved, which is conducive to the development of young root trees, promotes the growth of young trees, and improves their resistance to stress. Afforestation with film-covered drought-resistance technology eliminates the need for cultivating and weeding during sapling growth, avoiding competition for water and fertility between surrounding weeds and saplings. It also reduces the spread of pests and diseases, lowers forest fire ratings, and promotes healthy growth of young trees. . Fifth, soaking afforestation Soaking afforestation is to soak the seedlings with fresh water for more than 24 hours before afforestation. This will greatly increase the survival rate of afforestation. As the seedlings are deprived of water in the process of raising seedlings and transportation, and sometimes the seedlings cannot be planted in time, the survival rate of the trees is low. Therefore, soaking in fresh water before planting, so that the seedlings suck enough water to increase the survival rate of afforestation, if the seedlings after soaking mud is more effective, according to the test, after soaking, retting seedlings survival rate of afforestation up to 100 %, this technology is suitable for afforestation of bare root seedlings.
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