我县营造杨树丰产林已达5万余亩,有的已陆续采伐利用。采伐后的树梢都作薪炭柴烧掉。由于丰产林都是短轮伐期经营的人工林,所以树梢还都处于幼龄阶段,生长旺盛,组织尚未老化,如利用这些主梢代替大苗深栽造林,将是可取的。我们于1977年春在里庄乡南力沟村进行了试验。现将试验结果,整理如下。 My county to create a poplar rich forest has reached more than 50,000 acres, and some have been harvested. After cutting the trees are burning firewood burn. As high-yielding forests are all short-rotation plantations, the treetops are still in their infancy. They grow vigorously and the tissues have not aged yet. It would be advisable to use these main shoots instead of deep-seeding plants. We conducted the experiment in the spring of 1977 in Nali Village, Lizhuang Township. Now the test results, sorted as follows.