Genetic variation of 11 sib-families (145 clones) from Populus deltoides germplasm established by Nanjing Forestry University was analyzed on phenotype and molecular level, which provided the base for the polar breeding in future. The main results as follows:1.
本文从表型与分子两个层次上对南京林业大学建立的美洲黑杨种质资源库中的11个家系，145个无性系进行遗传变异研究，为将来杨树育种提供科学的依据。
参考来源 - 美洲黑杨种质资源遗传变异研究In total 125 nests were found in the field,nesting on willow, poplar, birch and other hardwood trees near lakes and rivers.
研究结果共发现巢125个,营巢位于于临近湖泊、河流等水域附近的柳树、杨树、桦树等阔叶树上。
参考来源 - 新疆北部白冠攀雀的巢与巢址选择The soil properties change is significantly correlated with the poplar growth. And the suitable hydraulic loading rate for domestic sewage treatment by poplar land is 6—9 cm/week.
生活污水杨树林地处理比较适宜的水力负荷是6—9cm/周。
参考来源 - 生活污水慢渗生态处理对土壤及杨树生长的影响·2,447,543篇论文数据，部分数据来源于NoteExpress
杨树上挂着奇怪的果实。
“中国在杨树种植方面取得了巨大成功。”卡尔说。
"Poplar planting in China has been a tremendous success," said Carle.
自然发生的森林火灾甚至比山体滑坡或积雪更能促进白杨树的生长。
Even more than mountainside slides of mud or snow, naturally occurring forest fires promote the survival of aspen trees.
应用推荐