一、造林地的选择和整地营造杨树速生丰产林,造林地的选择十分重要。要选择地势平坦,土壤质地为沙壤土或壤土,土层厚度1米以上,地下水位在1.5～3米,并有灌溉条件的地块。造林前要进行认真细致的全面整地,以提高土壤中水分和空气的通透性。通辽市文冠果林场1986年春季营造的500亩杨树速生丰产林,林地平坦、肥沃,造林地畦田化、井灌化,造林成话率达98％,林木长势喜人。而 First, the choice of afforestation and site preparation to create poplar fast growing forest, afforestation land choice is very important. To choose flat, the soil texture of sandy loam soil or loam, soil thickness of 1 meter above the groundwater table in 1.5 to 3 meters, and irrigation conditions of the plot. Before afforestation, careful and thorough land preparation should be carried out to improve the permeability of water and air in the soil. The 500-acre poplar fast-growing and high-yield forest was built in the spring of 1986 in the Wenqinguo Forest Farm in Tongliao City. The woodland is flat and fertile. and