Poplar crinkle disease is a new discovered in artificial poplar forest in Heilongjiang province.
杨树皱叶病是在黑龙江省杨树人工林中新发现的病害。
The wilting litter of the middle aged secondary mountain poplar forest and the decomposing process of litter as well as an amount of their accumulation were analysed with changes in time.
通过对黄土丘陵区中龄山杨次生林的凋落物及其分解过程，以及蓄积量随时间变化的分析，研究了枯枝落叶层的持水和截留作用及其蓄水减沙效益。
Poplar canker is mostly caused by fungi. These kind of fungi distributes world wide, parasites wide-ranging hosts, and harms the branches and fruits of many kinds of forest and fruit trees.
杨树溃疡病主要由真菌侵染所致，该真菌是一类世界性分布的真菌，寄主范围十分广泛，可危害多种林木和果树的树干及果实，引起枯枝、溃疡、流胶和果腐等。
Poplar; Fast-grown forest; Technical management.
杨树；速生丰产林；技术管理理。
For instance, the small island east of the Heavenly Water Service Center has preserved its original landscape with addition of new elements such as the poplar tree forest.
如天水服务中心东侧小岛就是保留原有地貌的前提下加入杨树林等新的绿化景观。
Poplar is one of the most fast-growing forest trees.
杨树是最速生的树种之一。
Forest and wildlife ecologists probably can point out additional adverse impacts that such extensive poplar monocultures can generate.
森林和野生生态学家可指出这类大量的单一种植可造成的更多的负面影响。
Poplar is the important tree species for shelterbelt and timber forest in our country. However, rapidly and fiercely-spreading by disease and pest has led to tremendous economic losses.
杨树是我国重要的防护林和用材林树种，但病虫害的迅猛发展造成了巨大损失。
Poplar is the important tree species for shelterbelt and timber forest in our country. However, rapidly and fiercely-spreading by disease and pest has led to tremendous economic losses.
杨树是我国重要的防护林和用材林树种，但病虫害的迅猛发展造成了巨大损失。
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