Poplar afforestation requires rapid growth and high yields. It must have excellent seedlings and scientific planting and management techniques in order to give full play to the potential for yield increase and achieve good economic benefits. The main technical requirements are as follows: l. Selection of afforestation sites: It is advisable to use high-post, riverbank soil, roadsides, and well-drained farmland. The perennial groundwater level should be below 1m, or after drainage, this requirement can be met. local. 2. Select excellent seedlings, robust plants, and well-developed seedlings for roots, and promote the main cultivars I?69, I-72, 35 Yang and 107 Yang. 3. Soak the whole tree seedlings for 3 days before planting. 4. Take the "three major and one deep" cultivation techniques, ie, large seedlings, large pits, large plant spacing, and deep planting." Tai Hang: It is better to plant ponds and dig ponds earlier, and it is better to complete them before the end of December to facilitate soil weathering. When digging the tree and pond, the excavated topsoil and subsoil shall be piled aside and the pit size shall be 1X1X1m or 1X1X 0.8m.. Big seedlings: One-year-old seedlings shall be used, with a ground diameter of 2.5cm or more and a height of 3.5m or more; Above 4cm and above 4m, Large row spacing: 5X6m for plywood, 5m6m for forest, 4m for single row of farmland forest, more than 4.5m for double row or above, suitable for close use according to the purpose. : The standard of the deep pond planting is 80cm in pond depth and not less than 60cm in planting depth 5. Planting season: Spring planting in late February and early March is appropriate to avoid afforestation below 0°C. Planting method; when planting, apply 1 kg of compound fertilizer to each pond, mix well with topsoil, fill in a small amount of topsoil in the pond, put the seedlings into the pond, fill in the soil, fill in the soil, fill in the 1/3, and then slightly upward In order to raise the roots and strengthen the roots After stratified filling, it is practicable to pour a layer of water once the soil is filled with 10-20cm from the ground, and it is advisable to fill the ponds with water. After the water is infiltrated, cover the soil again. 7. Management: Prevent the newly planted seedlings from being damaged. After the storm, it is necessary to correct and support the soil in a timely manner, paying attention to the control of pests and diseases.
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