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杨树材质好、生长快,一般栽后10年左右即可成材,是“四旁”绿化的优良树种,适于在房前屋后闲散空地栽植。1.选用良种,栽植大苗。经引种试验观察,我省全面推广的优良品种较多,如沙兰杨、健杨、德杂杨、小钻杨、小黑杨、加杨、小美旱等,各地可因地制宜选用。用于“四旁”的苗木,要选用2年生以上的大苗,苗高2米以上,苗木胸径2厘米以上,冠幅50厘米,根幅40厘米,根系完好,无病虫为害。栽这样的苗木可以一次成林,并且便于管护。
Poplar material is good, fast growth, generally about 10 years after planting can be useful, is “around” good tree species of green, suitable for idle vacant land in front of house planting. 1. Selection of elite, planting seedlings. The introduction of experimental observation, the province more comprehensive promotion of more good varieties, such as Chalanshan, Jian Yang, Germany Cha Yang, small drilling Yang, Populus, plus Yang, a small drought, all over the selection of local conditions. For the “four sides” seedlings, to use more than 2 years old seedlings, seedling height 2 meters above the seedling diameter of 2 cm above the crown 50 cm, 40 cm root width, root system intact, no pest damage. Planting such seedlings can be a forest, and easy to care and maintenance.