三倍体毛白杨新品种对比试验

经过９年对１９个三倍体毛白杨新品种的生长对比试验和各品种的干形、抗风折及抗病虫害能力的综合分析，结果表明，Ｌ１０、Ｌ４、Ｌ２、Ｌ３、Ｌ９和Ｌ１六个新品种综合性状最优，特别是Ｌ１０和Ｌ４的材积增益大于对照１．４倍～１．９倍，具有干形直、抗风折、病虫害少的优点，应作为重点发展的新品种。Ｌ１０、Ｌ３和Ｌ９为雄株，可用于城市绿化和通道工程绿化。目前三倍体毛白杨的病虫害有不断升级之势，天牛、白杨透翅蛾、根瘤病、潜叶蛾的危害较重，应引起人们足够的重视。

Contrast Test of Triploid Populus tomentosa New Species

triploid Populus tomentosa new species were tested in growth increment and analyzed on stem form and resistance to wind-breaking and pest, of which, L10,L4,L2,L3,L9 and L1 six epecies have best synthetic character,especially the L10 and L4 , with 14 to 19 times the volume increment of the control,straight stem, resistance to wind-breaking, and little pest, which should be a key species to develop. As to L10,L3, and L9, which are male plants, may be used in city and road greeningHowever, we should pay great attention to the trend of increasing pest which are cerambycids, Paranthrene tabaniformis, root nodule, and leaf miner.