我们大郭庄大队位于迁安北部的沙河沿岸。几年来,广大群众在毛主席关于“绿化祖国”,“实行大地园林化”的伟大号召指引下,积极发展四旁树,在河滩沙荒、渠路两旁、村边院内栽植杨树约16,000余株。但是,由于树种选择不当,大部分是当地的小叶杨和二青杨。实践证明,这两种杨树较优种杨树生长缓慢,生长在沙滩上七、八年生的杨树高不过3米,粗不足5厘米,甚至连年焦梢成为小老树,严重地影响成材速度和 Our large Guozhuang Brigade is located along the Shahe River in the north of Qian’an. In the past few years, the majority of the people, under the guidance of Chairman Mao’s great call on “greening the motherland,” and implementing “the practice of the earth garden,” actively developed the four-sided tree and planted more than 16,000 poplar trees on both sides of the floodplain and on both sides of the canal. However, due to improper tree species selection, the majority are native Populus and Populus euphratica. Practice has proved that these two poplar poplar trees grow more slowly, growing on the beach seven or eight years of tall poplar but 3 meters, less than 5 cm thick, and even the years become a little old coke shoots, a serious impact on the speed and