绿化树新秀﹃常绿杨﹄文／郭良城湖北省潜江市林业科学研究所引进的杨树新品种———“常绿杨”，是今后一段时期内，城市街道和公路绿化的理想接班品种。该树种生长快、易成材、更叶期短。据观察，１９９５年１２月江汉平原第一场大雪时，其它落叶乔木已万木凋零，而该树... Green trees rookie ﹃evergreen Yang﹄ text / Guo Liangcheng Qianjiang City, Hubei Province Forestry Science and Technology introduced a new poplar species - “evergreen” is the next period of time, the city streets and highway green succession varieties. The species grow fast, easy to become timber, more leaf period short. It is observed that in December 1995 the first heavy snowfall in the Jianghan Plain, the other deciduous trees have shrunk, and the tree ...